61results about How to "Meet the actual requirements of the project" patented technology

The invention discloses an incoherent spread spectrum digital transceiver instantaneous frequency measurement and demodulation method. The instantaneous frequency measurement and demodulation method is low in algorithm realization complexity and is multistation interference resistant. The method is realized through the following technical scheme that an incoherent reception algorithm module captures Doppler frequencies and code phases, detects sample data of an analog-to-digital converter through synchronization headers and finishes synchronization header correlation detection; an instantaneous frequency measurement module and a digital downconversion module eliminate Doppler through near-real-time ms magnitude Doppler frequency difference measurement and compensation, decimation filteringand matching filtering are carried out through an IDF decimation filter, sign bits of I and Q data are directly obtained, the data is changed into single bits for follow-up processing, incoherent demodulation and RS decoding are finished, and user data is output; and a spread spectrum transmitting algorithm module carries out framing, RS coding, differential coding and direct sequence spread spectrum processing on the user data, then carries out sign mapping and modulation on the user data, sends the user data to a DAC for digital-to-analogue conversion, and the DAC filters the user data through a double end to single end transformer and a second filter and outputs instantaneous frequency measurement and demodulation signals.

The invention relates to the technical field of engineering experiments, in particular to a visual experiment device and experiment method in consideration of slope instability soil displacement undera seepage-stress-rainfall coupling effect. The device comprises an artificial rainfall system, a seepage system and a simulated side slope; the artificial rainfall system comprises a water supply tank, an intelligent lifting device and a rainfall board; the seepage system is closely connected with a transparent model box, and the bottom of the seepage system is communicated with the transparent model box through a water stop clamp; a certain space is reserved at the bottom of the transparent model box, a gravel layer is laid above the reserved space, the saturated transparent soil simulated side slope with a certain inclined face is placed above the gravel layer, and anti-slip piles are inserted into the surface of the transparent soil side slope; a high-speed industrial camera is placedin front of the transparent model box, and a laser is arranged on the left side or the right side of the transparent model box. By adoption of a transparent soil technique and computer image processing software, the problem of visualization of soil interior displacement under the seepage-stress-rainfall coupling effect is solved, the experiment device is simple, easily understandable and reusable,and the experiment method is high in feasibility.

The invention discloses a modeling method for achieving distributed-generation-contained power distribution system fault recovery. The modeling method comprises the following steps of (1) reading original data of a distribution network, using a switch as the boundary to carry out partition on the distribution network, and using the switch as a decision variable; (2) forming an adjacency matrix of a region to be recovered; (3) forming a reachable matrix of the region to be recovered; (4) forming the Boolean function about various fault recovery constraints; (5) carrying out merging to form a final mixed decision diagram, carrying out conversion to form an orderly binary decision diagram, and contracting a solution space; (6) determining an optimal fault recovery scheme for the contracted solution space according to a priority of an objective function. The modeling method for achieving distributed-generation-contained power distribution system fault recovery can effectively reduce the complexity for solving the distributed-generation-contained power distribution network fault recovery problem, and can have the advantages of being high in computation speed, high in credibility of solutions, good in actual operability of projects and the like.

The invention relates to a wind power plant equivalent modeling method based on real-time operation data. The physical quantity can be measured through analysis of operational characteristics of a wind power plant and a real-time monitoring system, support vectors which determine unit operating states are extracted and input in a support vector machine, a unit is divided into four classes by building a new kernel function, and preliminary grouping of the unit is completed. Homology groups of all units are determined by combining geographical location information of the wind power plant to divide final results. By means of the wind power plant equivalent modeling method, a detailed model figure and an equivalent model figure are constructed in simulation software, and equivalent errors are analyzed. Compared with a traditional single-machine equivalent method, the equivalent method provided by the wind power plant equivalent modeling method is small in error, and can meet actual requirements of engineering.

The invention discloses a permanent magnet synchronous motor direct torque control method based on model predictive control, and belongs to the technical field of control. The invention aims to provide the manent magnet synchronous motor direct torque control method based on model predictive control, wherein by means of an electric vehicle wheel hub motor drive control method based on extended Kalman estimation and model predictive control, the defects in the prior art can be well overcome. According to the permanent magnet synchronous motor direct torque control method based on model predictive control, firstly, an extended Kalman principle is used for completing motor drive system estimator designing, secondly, torque and flux linkage values obtained by the estimator are used as feedbackvalues which are transferred to a motor control system controller along with reference set values, and finally, by solving an optimum control problem corresponding to a target function, fast accuratetracking control of motor torque and flux linkage is completed by the system. By means of the permanent magnet synchronous motor direct torque control method based on model predictive control, the problems of complex coordinate change and current magnitude coupling in a motor model are effectively solved, the system complexity is reduced, and dynamic response speed of the system and the intuitionism and the reliability of a system control effect are improved.

The invention discloses an evaluation method, device and equipment for a metal corrosion state, and the method comprises the steps: collecting a corrosion image of to-be-assessed power equipment metal, carrying out the color space conversion from an RGB model to an HIS model of the corrosion image, and extracting the colorimetry characteristic quantity of the corrosion image; after carrying out gray scale conversion and preprocessing operation on the corrosion image, calculating the morphology and texture characteristic quantity of the corrosion image; inputting the chromaticity characteristicquantity and the morphology texture characteristic quantity into a target corrosion evaluation network, and outputting a corrosion state evaluation value of the corrosion image; and determining the corrosion degree of the power equipment metal to be evaluated according to the corrosion state evaluation value. According to the method, the device and the equipment provided by the invention, the metal corrosion state evaluation efficiency is improved.

The invention discloses a method used for navigating a CEO satellite to disorbit, which comprises the following steps: (1), ensuring the working condition of disorbited satellite equipment, and propellant residual condition of the satellite prior to disorbiting; (2), ensuring the satellite disorbiting scheme according to the working condition of disorbited satellite equipment and the propellant residual condition; (3), specifying the performance of a thruster used for the disorbiting of the satellite according to the satellite disorbiting scheme; and (4), utilizing the satellite disorbiting scheme implemented by the thruster used for the disorbiting of the satellite, and carrying out inactivation operation for the disorbited satellite after the completion of the disorbiting of the satellite. According to the method provided by the invention, the operation and requirements for navigating the CEO satellite to disorbit are given, so as to ensure the CEO satellite to enter an abandoned orbit after the service life of the satellite ends.

The invention discloses a multifunctional ice or snow melting pavement test device and an evaluation method.The multifunctional ice or snow melting pavement test device is characterized in that a sealed case used for establishing a test environment is arranged; a test platform is arranged inside the case, a test piece to be tested is put on the test platform, and an ice or snow tank is arranged on the top of the test piece to be tested; an ice or snow pipeline is additionally arranged and used for putting ice or snow into the ice or snow tank; the test piece which is to be tested and used for simulating an ice or snow melting pavement is provided with a lower pavement layer, a middle heating layer and an upper pavement layer in a layered mode; a concrete precast element is adopted as the middle heating layer and provided with hole channels in an array mode, and strain pieces stick to the hole walls of all the hole channels; heating elements are put into the hole channels at set positions, heating holes are formed, and concrete rods are put into the hole channels without the heating elements to fill the hole channels.According to the multifunctional ice or snow melting pavement test device and the evaluation method, simulation tests of the deicing or snow melting process can be conducted according to different working conditions and pavement structures and different deicing or snow melting modes, the ice or snow melting efficiency and speed and the fatigue life are obtained, an optimal scheme is obtained by means of evaluation to the ice or snow melting pavement, and therefore the ice or snow melting pavement can be better applied.

The invention relates to an early determination method for a substation grounding grid. The method includes the steps: acquiring total fault current and current divider coefficient of the grounding grid and calculating buried short-circuit current; acquiring the size of a station zone of a substation and calculating the total area of the station zone; calculating the minimum section of a grounding body and selecting the shape and the section of the grounding body; calculating and checking the grounding resistance of the grounding body; calculating and checking maximum contact potential and step voltage of the station zone; performing economic and technical comparison on the grounding body meeting requirements to determine the optimal grounding grid design scheme; generating a grounding grid design calculation sheet, an engineering quantity list and an estimation sheet or approximate estimation sheet. The optimal grounding grid design scheme can be early determined, the method effectively solves the problem that a detailed engineering structure and use materials cannot be accurately determined at researchable and preliminary design stages, and an early design method is provided for the substation grounding grid engineering.

An embodiment of the invention discloses a configuration method for a series capacitor of a power distribution network. The method comprises the following steps: acquiring a candidate line of a series compensation capacitor, determining a capacitive impedance value range of the series compensation capacitor according to the candidate line, and determining a mounting position and a capacitive value of the series capacitor according to the capacitive impedance value range. According to the scheme, the configuration method for the series capacitor of the power distribution network has the features that minimizing of voltage integral deviation, total compensation capacitive impedance and active network loss serves as an optimized purpose, a tap of a transformer has the effect of adjusting voltage, the reasonable mounting position and capacitive impedance of the series capacitor are determined through multi-purpose optimized calculation and the like, so that a scientific basis is provided for formulation of a series capacitor optimized configuration scheme for improving voltage quality of the power distribution network, and the voltage quality of the power distribution network can be improved effectively.

The invention relates to a structure and process integrated design method for an FRP structural part. The structure and process integrated design method for the FRP structural part comprises the stepsof: (1), establishing a finite element model of the FRP structural part, performing parameterization of layer angle and layer thickness design variables, and establishing a material interpolation model; (2), performing finite element analysis on the structural part, extracting parameters required for calculating the sensitivity, and establishing a target function and a constraint condition on layer angle and total thickness design variables; (3), calculating the sensitivity of the target function and the constraint condition; (4), according to the sensitivity, iterating to obtain the optimalsolution of the target function by adopting a mathematical programming method, and updating a parameterization model of the layer angle and total thickness design variables; and (5), repeating the steps (2) to (4) till the result is converged or is up to the maximum iteration number, so that the optimal layer structure of the FRP structural part is obtained. Compared with the prior art, the structure and process integrated design method for the FRP structural part in the invention has the advantages that: structure and process integrated design is realized; and, on the premise that performancerequirements and manufacturing constraints are satisfied, the material utilization rate and the optimization design efficiency of the FRP structural part are effectively increased.

The invention discloses a discrete variable truss non-probability reliability optimization design method. The method includes the steps that firstly, a design variable and related design parameters of a truss needing optimization design are determined; secondly, the to-be-optimized truss is subjected to optimization processing by means of a pre-built discrete variable truss non-probability reliability optimization model. The method is simple in step, reasonable in design and good in use effect, an uncertain parameter vector influencing the reliability of the truss is taken into consideration, a displacement non-probability reliability indicator function and a stress non-probability reliability indicator function are built, structural optimization of truss discrete variable non-probability reliability is achieved, the weight of the truss is reduced, and it is guaranteed that the optimal design scheme of the truss is obtained.

The invention discloses a flow regulating device for a boiler superheater or a reheater distributing header branch pipe. The flow regulating device comprises a main header body, an inner sleeve and an importing pipe, the inner sleeve is arranged in a cavity of the main header body, the outer wall of the inner sleeve and the inner wall of the main header body form an annular cavity, a plurality of through holes are reserved in the sleeve wall of the inner sleeve, the left end of the inner sleeve is blocked at the left end of the main header body through a left sealing connecting unit, the right end of the inner sleeve is blocked at the right end of the main header body through a right sealing connecting unit, the importing pipe is in butt joint with the left end of the inner sleeve, the importing pipe after being in butt joint is communicated with the inner sleeve, superheated steam from the superheater or the reheater is imported into the inner sleeve by the importing sleeve and is imported into a branch pipe after being secondly distributed in the annual cavity formed by the inner sleeve and the main header body so as to regulate flow in the branch pipe. The flow regulating device can regulate steam flow from the branch pipe according to running condition of utility boiler heated wall temperature.

The invention relates to a flexible direct-current transmission synthetic loss calculation method and belongs to the field of flexible direct-current transmission. Synthetic loss comprises converter valve loss, converter transformer loss, reactor loss and filter loss, wherein the power loss of a converter is mainly caused by a switching device (IGBT) and antiparallel diodes of the converter and mainly comprises IGBT conduction loss, IGBT switching loss, diode conduction loss and diode reverse recovery loss. The method fills up the blank of flexible direct-current transmission synthetic loss calculation and is a relatively complete loss calculation method. The calculation result of the method meets the engineering practical requirement and has guidance significance for practical engineeringapplication.

The invention discloses a navigation GEO (geosynchronous orbit) satellite and stationary communication satellite collocating method. The method includes: (1) confirming orbit controlling requirements and orbit controlling rules of a stationary communication satellite; (2) confirming direction and change rules of phasor difference of an inclination angle between the navigation GEO satellite and the stationary communication satellite; (3) confirming the direction of the phasor difference of eccentricity ratio of the navigation GEO satellite compared with the stationary communication satellite; (4) if an included angle between the phasor difference of the inclination angle and the phasor difference of the eccentricity ratio, and the corresponding distance between the navigation GEO satellite and the stationary communication satellite cannot meet set requirements, adjusting the phasor difference of the eccentricity ratio; and (5) confirming a collocating strategy for the navigation GEO satellite and the stationary communication satellite. Aiming at mission feathers of the navigation GEO satellite, the problem of safe collocating operation of the satellites is solved.

The invention provides a blasting lumpiness measuring method based on photogrammetry and a particle contact theory, which comprises the following steps: Step 1, randomly selecting a rock sample from the blasted pile rock, and filling at least three containers; Step 2, vibrating and compacting the rock samples to form a test piece container; Step 3, respectively photographing the side surface of each test piece container to obtain a side surface projection image of the rock sample, and selecting a geometric characteristic parameter for measuring the rock lumpiness; carrying out lumpiness statistics on the particle size range to be solved to obtain the rock lumpiness condition; Step 4, measuring the void volume of the rock in each test piece container, and calculating the corresponding voidratio and the volume of the rock; Step 5, establishing a relation curve N1 between the void ratio and the rock lumpiness; and Step 6, establishing a relation curve N2 between the rock volume and the void ratio, then predicting the void ratio of the blasted pile rock under the same vibration compaction condition after blasting according to the total volume of the rock before blasting based on the curve N2, and estimating the rock lumpiness of the blasted pile rock according to the curve N1.

The invention discloses a network intrusion detection method based on deep learning, and the training process of the method comprises the steps: inputting an obtained data set into a to-be-trained convolutional neural network model, and extracting network traffic features through the to-be-trained convolutional neural network model; repeatedly extracting features with richer network traffic through a spatial pyramid model including a convolutional layer, an upper sampling layer and a lower sampling layer, and obtaining a multi-scale effective feature layer; and finally, predicting network intrusion classification confidence through logistic regression, predicting categories by using a logic classification model, and calculating loss errors of a real frame and a prediction frame through an error model. Then, repeated iterative optimization is carried out through reverse gradient, and the to-be-trained network intrusion detection model with the minimum loss error is used as a trained network intrusion detection model; according to the method, the detection precision and speed of network intrusion are further improved, the detection capability of unknown attacks is improved, and the false alarm rate is reduced.

The invention provides a visual testing device and method for soil and structure shearing characteristic research. The visual testing device comprises an upper shearing system, a lower shearing system, a horizontal force applying device and a data acquisition system. The upper shearing system is composed of transparent soil, a glass cylinder, an oil hydraulic system and an axial pressing system. An upper cover is arranged on the upper portion of the glass cylinder, and a loading rod and a loading plate are arranged between the axial pressing system and the transparent soil. The lower shearingsystem is composed of a rock-like or concrete-like material, a shearing box and a base. The horizontal force applying system is composed of a motor, a propelling worm and a horizontal displacement meter. A hand wheel applies horizontal push force to the base through the propelling worm, and liquid beads are arranged between an optical platform and a shearing box. The data acquisition system is composed of a laser, a CCD camera and a computer. By means of the visual testing device and method, the problem that contact surface stress and displacement are not visible during soil and structure shearing failures is solved, and the purpose of visual observation of the contact surface during soil and structure shearing failures is achieved.

The invention mainly aims to provide a cement-based cementing material suitable for an environment of-10 DEG C to-30 DEG C and a construction method and application of the cement-based cementing material. The material comprises the following components in parts by mass: 0-5 parts of anhydrite; 15-25 parts of sulphoaluminate cement; 0.1-0.3 part of a water reducing agent; 0-0.3 part of a water-retaining agent; 0.1-0.3 part of a retarder; 0.1-0.3 part of an early strength agent; 55-75 parts of sand; 1-3 parts of an antifreezing agent and 7-12 parts of water. The technical problem to be solved isthat the existing cement-based cementing material cannot be subjected to cold material on-site heating-free mixing and construction under the negative temperature condition. The use requirement in anextreme negative temperature environment can be met by controlling the freezing point of a mixing solution, promoting cement hydration and other technical measures and adjusting the component proportion of the cementing material, and the purposes of direct mixing and pouring of cold materials in a low-temperature environment of-10 DEG C to-30 DEG C and heating-free maintenance are achieved; the cement-based cementing material does not need additional special curing measures such as heating curing and is high in strength development speed and low in cost and does not influence engineering progress and is more practical.

The invention discloses a triaxial micromachine accelerometer static correction method based on particle swarm optimization. The method includes the steps that a triaxial MEMS accelerometer and a relevant peripheral circuit are welded to a designated circuit board to form a test and using circuit of the accelerometer, and normal operation and data output of the accelerometer are guaranteed; the circuit board is fixed to a certain space point, and the circuit board can be freely rotated on three axial directions of space; the circuit board provided with the accelerometer is manually or automatically driven by an external device to rotate in the space, the rotating speed is smaller than 10 degrees per second, the rotation track of the accelerometer covers main distribution of a spherical surface, and actual output data of the accelerometer are recorded; after the collected data are preprocessed, an error estimation algorithm of the accelerometer is designed according to a standard PSO processing method; an error correction model of the accelerometer is set according to the estimated error model, and measurement accuracy of the accelerometer is improved. By the adoption of the method, random errors in the sampling process are effectively eliminated, and measurement accuracy of the MEMS accelerometer is further improved.

The invention discloses a two-rotating two-moving parallel machining swing head mechanism. The two-rotating two-moving parallel machining swing head mechanism comprises a fixed barrel, four linear driving modules, four connecting rod branches and a movable platform with a machining spindle. The four linear driving modules are fixed to the fixed barrel, the first linear driving module and the second linear driving module are fixed into the left-right symmetric faces of the fixed barrel, and the two third linear driving modules are fixed to the two sides of the left-right symmetric faces of thefixed barrel. Stretching barrels of the second linear driving module and the third linear driving modules are identical in structure and penetrate through a stretching barrel of the first linear driving module. One ends of two first connecting rod branches are connected with the movable ends of the first linear driving module and the second linear driving module through rotating hinges correspondingly. One ends of two second connecting rod branches are connected with the movable ends of the two third linear driving modules through spherical hinges correspondingly. The other ends of the connecting rod branches are connected with the movable platform through universal hinges. The two-rotating two-moving parallel machining swing head mechanism is good in dynamic property, high in rigidity andhigh in machining precision, and curved face machining is achieved.

The invention relates to an attitude control method for an underactuated spacecraft actively assisted by a light pressure torque. The method comprises the following steps of taking the spacecraft witha flywheel and two pairs of solar panels as an object, and firstly establishing a kinetic model of a flexible spacecraft with a flexible attachment and a attitude kinematics equation of the spacecraft; establishing a simplified analytical model of a solar pressure torque; designing a linear quadratic optimal controller to obtain a three-axis desired torque, analyzing characteristics of the solarpressure torque, and distributing the three-axis torque to the solar pressure torque and a flywheel torque; under the assumption that the surface characteristics of the panels are constant, solving aninverse solution according to the simplified solar pressure torque model of the panels to directly obtain a corner steering law of the solar panels; and obtaining a corner steering law of the solar panels based on numerical optimization by solving constrained nonlinear programming problems. The attitude control method provided by the invention can effectively improve the controllability of the attitude and improve the control performance, and is more suitable for the engineering practice by adopting a control scheme in which the steering law and the control law are separated.

The invention discloses a low-noise power capacitor using damping steel plates. The low-noise power capacitor comprises a capacitor shell, a core, a casing, and a sound insulation cavity. The casing is arranged on the top of the capacitor shell. The core is arranged inside the capacitor shell. The sound insulation cavity is arranged at the bottom of the capacitor shell. The sound insulation cavity is a closed cavity structure composed of inner and outer steel plates. A damping material is arranged between the outer steel plate and the inner steel plate to form a three-layer closed cavity structure. By making use of low density, sound insulation, noise reduction, vibration absorption, high strength, high specific rigidity and other advantages of the damping steel plates, vibration at the bottom of the power capacitor can be reduced. The closed cavity formed by welding the damping steel plates is used to insulate sound in the main contribution frequency band of noise, so that vibration at the bottom of the power capacitor is reduced, and actual engineering requirements are met.

The invention discloses four-branch swallow-shaped five-axis machining equipment. The four-branch swallow-shaped five-axis machining equipment comprises a main shaft, a single swinging head, a moving platform, four linear driving branches, a rack, a first rotary frame and two second rotary frames; the first rotary frame is located in the left and right symmetrical surfaces of the rack and is connected with the rack through a revolute pair; two first linear driving branches penetrate through the first rotary frame, and the middle part and one end of each first linear driving branch are separately connected with the first rotary frame and the moving platform; the axes of four revolute pairs are parallel to one another and are vertical to the rotation axis of the first rotary frame; the two second rotary frames are located on the left and right sides of the rack and are connected with the rack through revolute pairs; two second linear driving branches penetrate through the corresponding second rotary frames; the middle part of each second linear driving branch is connected with the corresponding second rotary frame through the corresponding revolute pair, and one end of each second linear driving branch is connected with the moving platform through a spherical hinge; the single swinging head is arranged on the moving platform; and the main shaft is fixed on the single swinging head. The four-branch swallow-shaped five-axis machining equipment is compact in structure, high in structural rigidity, high in bearing capacity and high in machining precision; and curve surface machining can be realized through five-axis linkage.

The invention discloses a flowing water destruction sieving test device and method. The device includes a destruction sieving test barrel, a flowing water guiding device and a circulating water pump system; the destruction sieving test barrel includes a testing barrel framework, a clamping slot, a sieving disc, a testing barrel cover, a filtering screen and the like; the flowing water guiding device comprises a flow guiding groove, a water inlet, a water outlet and a sprayer, and the flow guiding groove is bonded with the framework of the destruction sieving test barrel through water-resistantglue; the sprayer is arranged between a water guiding groove and a guiding pipe in order to make a water flow in the flow guiding groove close to a laminar flow. The circulating water pump system includes a water pump, a water pump valve and the guiding pipe. Through the water pump, power is provided for water, and the flow guiding groove serves as a buffering strip. According to different waterpumping powers of the water pump, the flow speed can be quantitatively controlled, the destruction speed rates under different flow speeds and sieved objects different in granule size are obtained, the specific gravity occupied by each destructed object different in granule size is precisely measured, and the flowing water destruction sieving test device has the advantages of being accurate in measurement, simple and practical in design, light in weight and convenient to move.

The invention discloses a crystal cultivation process environment vibration influence quantitative and rapid assessment method. The method comprises the steps that 1, the first three order vibration mode frequencies f1, f2 and f3 of a crystal cultivation structure are obtained; 2, a vibration response allowable target [R] of the crystal cultivation structure is determined according to process design of the crystal cultivation structure; 3, the environment vibration excellent frequency band center frequency fL is tested; 4, on the condition that the first two order vibration mode quality accumulation participation coefficient is larger than 80%, whether f3 / f1>10 and f3 / f2>10 are met or not is judged, and if yes, the step 5 is executed; 5, whether (f1-fL) / fL<0.05 is met or not is judged, andif yes, the step 6 is executed; 6, a single degree-of-freedom single particle power model response value RS, double degree-of-freedom single particle power model response values R[D, x] and R[D,y] are calculated, an x direction vector, a y direction vector and a maximum response value RD are judged, and the RS and the RD are compared to take the maximum value; 7, the maximum value in the RS and the RD is smaller than [R] or not is judged, and if yes, it is judged that the vibration environment does not affect crystal cultivation equipment.

The invention relates to a method for identifying parameters of a space target under double-arm capture based on a kinetic model. The method comprises the steps of taking a combined multi-rigid-body system as an object, wherein the combined multi-rigid-body system is formed by a space debris active removal aircraft provided with a double-mechanical-arm system and a space non-cooperative target captured by double mechanical arms; firstly, establishing a dynamical model of a combined spacecraft system and a central platform attitude kinematical equation after capturing a space non-cooperative target, wherein the dynamical model of the combined spacecraft system comprises a translation equation, a rotation equation and a mechanical arm rotation equation of a central platform and a rotation equation of a to-be-identified body; obtaining the acceleration, the posture, the angular velocity and the angular acceleration of the central platform and the rotating angle, the rotating angular velocity and other information of each section of connecting rod of each mechanical arm through sensor measurement; according to a central platform rotation equation in the system dynamics model, deriving and sorting forms, and exporting an identification equation; and finally, on the basis of a least square algorithm, identifying and estimating quality characteristic parameters of the to-be-identified body.

The invention discloses a low-noise power capacitor based on a damping steel plate. The low-noise power capacitor comprises a capacitor shell, a capacitor core, a sound insulation cavity and a terminal sheath, wherein the capacitor core is arranged inside the capacitor shell; the sound insulation cavity is of a closed cavity structure formed by combining an inner layer steel plate and an outer layer steel plate; the sound insulation cavity is arranged in the bottom of the capacitor shell; the closed cavity structure is fixed to the bottom of the capacitor through welding; a damping material isarranged between the outer layer steel plate and the inner layer steel plate, and a three-layer closed cavity structure is formed; the terminal sheath is arranged at the top of the capacitor shell. According to the low-noise power capacitor, the damping steel plate which has the advantages of low density, sound insulation and noise reduction, vibration absorption, high specific strength, high specific rigidity and the like are utilized, so that the vibration of the bottom of the power capacitor can be reduced; and the closed cavity formed by welding the damping steel plate is used for carrying out sound insulation on the main noise contribution frequency band, so that the noise of the bottom of the power capacitor is reduced, and the practical requirements of engineering are met.

Ultra-short-term prediction of a traction load is a key link in electric energy control of an electrified railway. Aims at the characteristics that the traction load random volatility is high, the jump amplitude value is large, and no-load is frequent, the invention provides a DWT-TCN-SVR combined prediction method which integrates DWT (discrete wavelet transform), TCN (temporal convolutional network) and SVR (support vector regression). The method comprises the following steps: firstly, decomposing a traction load time sequence into low-frequency, intermediate-frequency and high-frequency subsequences by using a wavelet decomposition method, then predicting the low-frequency and intermediate-frequency sequences by using a TCN model, predicting a high-frequency part by using an SVR model, and finally superposing and restoring respective prediction results to obtain a final prediction result.