375results about How to "Short adjustment time" patented technology

This invention provides a white balance adjusting method and a system, in which, the method includes: adjusting RGB gain value and configuring bright step of a display screen to meet the needs of clients based on the relation of coordinate and brightness corresponding to a color temperature with RGB gain, adjusting RGB offset value and configuring the dark step of the display screen to meet the needs of the clients based on the relation of color coordinate corresponding to the color temperature and the RGB offset to just if the bright step and the dark step meet the needs of the clients simultaneously, if so, it ends the adjustment, otherwise, it continues configuring bright and dark steps of the screen.

The invention discloses a multi-shaft support air floatation platform leveling method and belongs to the technical field of ultraprecise apparatus platforms. The multi-shaft support air floatation platform leveling method aims to solve the problem that existing support platforms are limited in leveling conditions and narrow in application range. The method includes that: an upper computer transmits a current working mode, a control command and an error parameter to a controller via the Ethernet; the controller transmits servo period starting signals for every 200microseconds to start a moving state working mode or a static state working mode; the controller performs data fusion on all feedback signals read by the same so as to acquire regulating amount of support legs, corrects driving signals of a servo voice coil motor by means of driving a servo voice coil motor driver, judges whether a bearing platform is in static state or not and whether levelness of the bearing platform reaches to a preset precision range or not, and if so, finishes the current servo period leveling and waits for the next servo period till all servo periods are finished. The multi-shaft support air floatation platform leveling method is used for leveling of the air floatation platform.

The invention discloses an automatic gain control device and an automatic gain control method. In the device, the energy classification is conducted on received signals, different gain control process flows are adopted for different energy levels, so that the strengths of the input signals are controlled in a certain range, thereby being adapting to the signals in various strength levels, so that a signal receiving system can achieve the best receiving effect.

Method for positioning a viewing axis in relation to a distal fixation hole (2) for an intramedullary nail (1). A rigid support (3) is fixed to the proximal end of the nail (1). An adjustable viewing device (9) is mounted on the rigid support (3). A coarse adjustment is done of the length of the rigid support according to the length of the nail (1). A coarse adjustment is done in order to move the viewing device (9) closer to the nail, taking account of the patient's build. A precise adjustment is done of the position of the viewing device in relation to the nail, involving the translational and / or rotational movement of the viewing device in a plane perpendicular to the longitudinal axis of the viewing device (Z).

A measurement control system for a multi-shaft supported air floatation platform, the system comprising a load feedback unit (5), an execution unit (6), a position measurement unit (7), a safety protection unit (8), a controller (9), a rotating motor (10), and a linear light source 11; the load feedback unit comprises M pressure sensors (5-1) and four differential sensors (5-2); the execution unit comprises M servo voice coil motors (6-1) and M servo voice coil motor drivers (6-2); the position measurement unit comprises a plane grating (7-1), M linear gratings (7-2) a linear array CCD (7-3), a tilt sensor (7-4), M electronic levels (7-5), and an indoor GPS (7-6); the safety protection unit comprises 2M proximity sensors (8-1) and M temperature sensors (8-2); and the linear array CCD consists of no few then six CCDs. The system solves the problems of leveling limitations and narrow application range of existing supporting platforms.

The invention discloses an ultrasonic scalpel system based on frequency and power tracking and a control method thereof. The ultrasonic scalpel system comprises a main control MCU, a DDS-based signalgeneration control module, a power output isolation module, an interaction module and a medical switching power supply, wherein the signal generation control module uses a DDS chip to generate two paths of high-precision PWM signals with specific frequencies, and the power is controlled by a digital control half-bridge power adjusting circuit based on a clock circuit; and the power isolation module is used for matching the inductive reactance through the series power inductance, providing an interface for an ultrasonic scalpel, and respectively using a PID algorithm and an ADRC algorithm to control the power output and the working frequency of the ultrasonic scalpel in real time so as to achieve the real-time control of the power and the follow-up control of the resonance point frequency.The system has the advantages of high control precision, high response speed, good operation effect, high energy utilization rate, convenient operation and the like, and is suitable for driving ultrasonic surgical scalpel equipment in common ultrasonic surgical operations.

An intelligent high-low temperature test box temperature control system includes a temperature sensor mounted in the test box working area, the output terminal of the temperature sensor is connected to the input terminal of PLC, the refrigerating output terminal of the PLC controls a refrigeration system, and the heating output terminal of the PLC controls a heater, wherein, the heater and the refrigeration evaporator in the refrigeration system are mounted in a temperature adjustment area of the test box. The inventive intelligent high-low temperature test box temperature control system has significant effects of few system loop, simple structure, reasonable use of resources, low energy consumption, fast adjustment time, simple operation, and low machine utilization.

The invention discloses a photovoltaic solar energy rotation support which comprises at least two bases arranged side by side. Stand columns are arranged at the upper ends of the bases and provided with U-shaped holes in the length direction of the stand columns, and rotating shafts are further arranged at the upper ends of the U-shaped holes in a sleeved mode. A photovoltaic rotation support body is arranged on each rotating shaft in a sleeving mode and comprises a cross beam and a semicircular frame perpendicular to the cross beam, wherein the circle center of the semicircular frame is on the cross beam, the rotating shaft penetrates through the circle center of the semicircular frame so that the photovoltaic rotation support body can rotate around the rotating shaft, and a circular arc rack is further arranged in the circumference direction of the semicircular frame. U-shaped supports are further arranged on the part, located at the lower ends of the circular arc racks, on the stand columns in the horizontal direction, a main shaft is sleeved with the U-shaped supports and penetrates though the bases arranged side by side in sequence, gears are further arranged on the main shaft in a sleeving mode, and the gears are meshed with the circular arc racks. By means of the photovoltaic solar energy rotation support, overall simultaneous angle adjustment can be achieved, the adjusting time is short, the working efficiency is high, the adjusting precision is high, the utilization of solar energy is effectively improved, operation is convenient, and manual operation and automatic operation can be achieved.

A head-up display including a display panel, a non-mechanical focusing lens, and a determining unit is provided. The display panel is configured to emit an image beam. The non-mechanical focusing lens is disposed on a transmission path of the image beam and generates an image of the image beam. The determining unit is electrically connected to the non-mechanical focusing lens and configured to adjust a focal length of the non-mechanical focusing lens according to a sensing signal, so as to change an image distance from the image to a user's eye.

The invention discloses a heavy battened steel column mounting construction process. The mounting construction process comprises the following steps of: A) detecting foundation dimension of a cup opening and adjusting a dimension error; B) snapping a line on the foundation and correcting elevation; C) measuring the distance from a bracket surface to the lower surface of a column bottom plate; D) lifting a heavy battened steel column; E) adjusting a column foot center line relative to a locating axis; F) adjusting the verticality of an axis of the heavy battened steel column; and G) fixing the heavy battened steel column. According to the invention, the heavy battened steel column correcting process is improved so that the working efficiency is largely enhanced and the labor intensity is reduced; and compared with the traditional correcting method, the heavy battened steel column mounting construction process disclosed by the invention has the advantages of short time in the adjusting process, capability of reducing 1 / 3 working time and engineering cost conservation.

The method features the following points: when a failure link or a failure router appears in the network exchanging path, the downstream router adjacent the failure router or the failure link re-establish the exchange path; meanwhile, the source router sends the path detection message to decide if the path between the source router and the destination route is the shortest path; if not, the destination route sends the path modification message to re-establish a shortest path.

The invention discloses a measurement and monitoring method for centroid skewing permitted interference of a multi-axis support air floating platform and belongs to the technical field of an ultra-precise apparatus platform. The invention solves the problem that an existing support platform is limited in leveling state and is narrow in the range of application. The measurement and monitoring method comprises the steps that a centroid offset threshold is firstly set, a centroid offset G (x0, y0) is compared with the centroid offset threshold, and when the centroid offset G (x0, y0) is less than the centroid offset threshold, the telescopic length of each support leg is compensated; when the centroid offset G (x0, y0) is greater than the centroid offset threshold, nozzles of air feet are controlled to spray air, so as to enable a chassis platform to carry out translational motion in a horizontal concrete foundation and move along with the load on the chassis platform, so that the relative offset (x2, y2) is adjusted until the centroid offset G (x0, y0) is adjusted to be in the range of the centroid offset threshold. The measurement and monitoring method for centroid skewing permitted interference of the multi-axis support air floating platform is applicable to the measurement and monitoring of centroid skewing permitted interference of air floating platforms.

The invention discloses a method for designing parameters of fuzzy PI (proportion integration) controllers of PWM (pulse width modulation) rectifiers. The method includes acquiring voltage external loop PI parameters by means of computation according to conventional processes for designing the PI controllers when the parameters of the voltage outer loop fuzzy controllers of the PWM rectifiers are designed; selecting a plurality of groups of PI parameters of the same order of magnitude according to arithmetic sequences on the basis of the voltage outer loop PI parameters, substituting the selected multiple groups of parameters into systems to carry out simulation and recording dynamic performance simulation results of the systems under the conditions of the various groups of PI parameters; determining the maximum values K<P_max> of variation of parameters K of PI adjusters and the maximum values K<i_max> of variation of parameters K of the PI adjusters by the aid of curve characters of the simulation results. The method has the advantages that actual parameters K and K are adjusted in real-time according to fuzzy control principles and deviation e and deviation variation rates ec of the systems, the PI parameters are acquired by the aid of the dynamic performance simulation curve characters of the systems, accordingly, blind selection of the parameters can be prevented, and the systems are short in adjusting time and low in overshoot on the premise that the systems work stably.

The invention discloses a method for realizing automatic adjustment of a Gamma curve of a television through a computer, which is mainly characterized in that a user sets up picture quality indexes needing to be adjusted through a human-computer interface on the computer; meanwhile, the current practical Gamma data of the television is collected by the computer and is calculated through using a Gamma automatic adjustment algorithm; the calculated adjustment data is sent to a receiving end of the television; data information forwarded by the computer is timely received by the television through an RS232 interface and is decrypted; control contents of the computer, which mainly comprise red-green-blue (RGB) information of the Gamma curve, are responded according to contents of an information packet; and through repeated calculation and adjustment, the automatic adjustment of the Gamma curve of the television is finally realized. By adopting the method, the regulated Gamma curve has high transitivity, and has the characteristics of good adaptability, quick adjustment speed, high veracity and good safety.

A sub-carriage includes a first head mounting portion and a second head mounting portion. The second head mounting portion includes at least a portion of constitution members of an adjustment mechanism which adjusts a position of the second head, a first recording head of one side of the same set is fixed in a state of being positioned to the first head mounting portion so that the nozzles are disposed in a defined position, and a second recording head of the other side is fixed to the second head mounting portion in a state where the relative position to the first recording head is defined by the adjustment mechanism based on a landing position in a recording medium of ink ejected from predetermined nozzles of the second recording head with respect to a landing position in a recording medium of ink ejected from predetermined nozzles of the first head.

The invention discloses a distributed dynamic matrix frequency control method of interconnected power systems considering wind power, comprising the following steps: establishing a distributed discrete time state space model of the interconnected power systems considering the wind power based on a mechanism analysis modeling method and a discretization method, designing respective area control errors and quadratic control performance indexes weighted by a fan angular velocity output prediction deviation vector and a control increment prediction vector as rolling optimized objective functions, considering respective constraint conditions of a system output prediction deviation, a control prediction signal and an increment prediction signal, adopting a distributed constraint dynamic matrix control method based on a self-adaptive colony optimization strategy to realize load frequency coordinated optimization and control of the interconnected power systems in respective areas. Compared with the prior art, time domain response of load frequency of the interconnected power systems considering the wind power according to the invention has the advantages of faster regulation time, smaller dynamic oscillation amplitude, smaller steady-state error and higher robust performance.

The invention discloses a control circuit of a two-way DC / DC (Direct Current / Direct Current) power converter and a control method of the control circuit, and belongs to the field of control circuits of power converters. The control circuit comprises a voltage division detection circuit, a voltage follower, an A / D (Analog to Digital) conversion circuit, a digital controller and a driving circuit. The control method takes control of voltage of a high voltage side as an example, and comprises the steps of stabilizing the voltage of the high voltage side by the digital controller in a PID (Proportion Integration Differentiation) control mode when the power converter operates in a steady state, and switching to capacitor charge balance control in a corresponding Buck or Boost mode from the PID control mode when the voltage division detection circuit detects that a fluctuation of the voltage of the high voltage side exceeds a set threshold. For the problem of poor dynamic property of the two-way DC / DC power converter in the prior art, the control circuit ensures an optimal transient state response process, has high steady state output accuracy, and is applicable to any non-isolated two-way DC / DC power converter.

The invention relates to a rolling curtain drive device, which comprises a motor and a control section, wherein the control section comprises a microprocessor, a switch circuit, a memory, and a control signal circuit; the motor is connected with a drive power supply through the switch circuit; the switch circuit is connected with the microprocessor; the memory is connected with the microprocessor; the control signal circuit is connected with the microprocessor and is provided with an uplink key, a downlink key and a stop key; the control signal circuit also comprises a control signal receiving circuit, a control signal output circuit corresponding to the control signal receiving circuit, and ID keys respectively arranged on the control signal output circuit and the receiving circuit; the receiving circuit is connected with the microprocessor; and the control signal output circuit can output data information including ID codes, key position and function code of the control signal output circuit and capable of regulating the motor rotation direction to the control signal receiving circuit. Accordingly, the drive device can regulate the motor rotation direction without changing the mounting position of the motor on the reel or the direction of curtain cloth surrounding the reel. The invention relates to the drive device and the method capable of regulating motor rotation direction of rolling curtain.

The invention discloses a PID parameter tuning method for particle swarm optimization based on inertia weight cosine adjustment, which relates to the technical field of particle swarm algorithms. Themethod comprises the following steps: (1) population initialization operation is carried out; (2) a particle swarm individual is decoded to a proportion Kp, an integral Ki and a differential Kd; (3) asimulink model is operated to select an integrated time absolute error (ITAE) criterion as a fitness function of the algorithm; (4) the fitness value of the initial population is calculated accordingto the fitness function, and an individual extreme value pBest and a global extreme value gBest are obtained; (5) the inertia weight is dynamically adjusted according to an inertia weight cosine adjustment formula, the speed and the position are calculated according to an evolutionary iteration formula, and a new-generation particle swarm is thus obtained; (6) the fitness value of a particle swarm individual after updating is calculated by the ITAE criterion; (7) if the termination condition of the maximum iteration number or the minimum precision is reached, an eighth step is carried out, and if the termination condition is not reached, the fifth step is carried out; and (8) the operation is terminated, and a global optimal value is obtained.

The invention discloses an SMT ((Surface Mount Technology) closed-loop integrated optimization system and an optimization method thereof. The SMT closed-loop integrated optimization system comprises a data acquisition module, a chip mounter performance evaluation module, an integrated optimization module and a database management module. The optimization method comprises the steps of: when an SMT production line is started, firstly obtaining performance indexes of the chip mounter and combining with PCB (Printed Circuit Board) information by the integrated optimization module to obtain a balanced optimization scheme; distributing the production plan through the balanced optimization scheme; at the same time, acquiring physical parameters in the mounting process of the chip mounter and the chip mounting quality parameters after the production are acquired in the running and producing process of the chip mounter of the SMT production line; obtaining performance indexes of the chip mounter and feeding back the performance indexes to the integrated optimization module to serve as the reference basis of selecting the chip mounter when the balanced optimization scheme is obtained after the next SMT production line is started. In addition, repeated optimization is carried out when a sudden event occurs. According to the invention, the performance of the chip mounter and the PCB information are considered in the optimization process, and the production efficiency and stability of the whole SMT production line are improved.

The invention provides a multifunctional high and low temperature impulse testing box which is composed of a heating area, a working area and a refrigerating area. A heating system is arranged in the heating area, a refrigerating system is arranged in the refrigerating area, partition plates are arranged between the areas, the two ends of each partition plate are respectively provided with a ventilating door, and the ventilating doors are respectively connected with a ventilating door control device. The control end of the heating system, the control end of the refrigerating system and the control ends of the ventilating door control devices are connected to a PLC. The multifunctional high and low temperature impulse testing box is characterized in that the PLC is internally provided with a heat and cold impulse testing control system and a high / low temperature alternating testing control system, and the PLC is connected with a work pattern switching circuit. The multifunctional high and low temperature impulse testing box has the advantages that both a cold and heat impulse test and a high / low temperature alternating test can be carried out through the testing box, a box body is simple in structure, the equipment functions are complete, the energy consumption is low, the adjusting time is short, and the service life of the testing box is long.

The invention discloses an automatic one-dimensional-equilibrium adjusting lifting tool for a spacecraft. The lifting tool comprises a main lifting beam, a control module, a power supply, a driving motor, a tilt angle sensor, a balance weight moving mechanism, a stretching auxiliary lifting beam, a tension sensor and a lifting ring assembly, wherein the control module, the power supply, the driving motor, the tilt angle sensor and the balance weight moving mechanism are arranged in the main lifting beam; one end of the stretching auxiliary lifting beam is connected with the main lifting beam, and the other end of the stretching auxiliary lifting beam is connected with the tension sensor and the lifting ring assembly. By automatically adjusting the equilibrium position by virtue of a balance weight, the lifting tool has the characteristics of short adjusting time, high adjusting precision, adjustability in bearing range, good universality and the like, the safe, efficient and high-precision mounting and dismounting work of a heavy device can be realized, the labor cost is saved, the working efficiency is increased, the requirement of the ever-developing spacecraft on the automatic technical level of a final assembly is met, and the automatic level of the final assembly of the spacecraft is improved.

The invention discloses a triaxial stable platform and an all-digital control system and method. The triaxial stable platform solves the problem that the existing stable platform has a smaller size, harsh structural adaptability and higher use performance requirements. The triaxial stable platform creatively utilizes small-scale high-precision inertial instruments such as fiber optic gyroscopes, photoelectric encoders and brushless torque motors and utilizes a novel distribution and digitization form of a stable loop computer, a high-speed serial bus and an inertial instrument data acquisitionunit so that the stable system size is greatly reduced. The triaxial stable platform utilizes a synchronous clock as a frequency marker so that inertial data acquisition, control rate calculation andtorque current transmission are realized. The brushless torque motor performs current vector control. The stable loop computer realizes a fiber-optic gyroscope error compensation method and integraldelay control strategy through a high-performance digital signal processor and realizes platform coordinate system stabilization along an inertial space direction.

The invention provides a device and method for automatically loading an anti-islanding protection test system. The device comprises a data acquisition unit, a data processing unit and a RLC load adjusting unit, wherein the data acquisition unit, the data processing unit and the RLC load adjusting unit are sequentially connected. The RLC load adjusting unit respectively controls a load switch K1, a network side switch K2 and a combination switching switch of the RLC load adjusting unit through output signals. The corresponding automatic loading method is used for detecting the output power of a photovoltaic system on line and in real time, RLC loads are rapidly, automatically and accurately adjusted, resonance of three-phase independent alternating current electric equipment is generated, and the testing process is convenient to conduct, fast and accurate.

The invention discloses a multi-target robust fractional frequency control method for an independent micro-grid. Small signal frequency response models of various components of an independent micro-grid system are built through a small signal modeling method; a robust loop shaping fractional frequency control model of the independent micro-grid system is built on the basis of the small signal frequency response models; the minimum accumulated sum of products of frequency deviations of the independent micro-grid system and time, the minimum accumulated sum of the products of power deviations of the system and the time, the minimum infinite norm of a robust loop shaping system matrix function and the minimum output signal value of a robust controller are taken as optimized objective functions for estimating the performance of the robust frequency controller; and an adaptive multi-objective constraint optimization solver is designed for efficiently achieving optimal setting of robust loop shaping frequency control parameters by employing the conditions that a robust stability performance index and an interference suppression performance index are smaller than 1 as constraint conditions. By the multi-target robust frequency control method for the independent micro-grid, robust frequency control on multi-performance index compromise optimization of the independent micro-grid system can be achieved.

The invention discloses a DC micro-grid system and a variable droop coefficient control method thereof. The DC micro-grid system comprises three converter units, two resistive loads, a TMS320F28335 controller and its accessory circuit. The variable droop coefficient control method, compared with the conventional droop control, incorporates voltage recovery control and droop coefficient correctioncontrol. The method performs voltage compensation control on the output voltage minimum value, achieves a control objective that the converter output voltage minimum value is the same as a set reference value, and solves the large deviation of the conventional droop control DC bus voltage and the set voltage reference value. The method fixes the droop coefficient of one converter, and obtains thedroop coefficient compensation terms of the remaining converters by the droop coefficient correction control. The droop coefficient reference value is superimposed onto the droop coefficient compensation terms so as to form a corrected droop coefficient. Then the droop control is performed, thereby achieving a control objective that the converters equally distribute the load current under the condition that the line resistances have a large difference, and solving the problem that the shunt accuracy decreases when the line resistances of the converters are inconsistent.

The invention belongs to the technical field of hydraulic adjustment and particularly relates to an automatic oil feeding type isomorphic double-cylinder leveling system. The system comprises a driving cylinder, a controller, a proportional solenoid valve, a driven cylinder and a redundancy inclined angle sensor, wherein rodless cavities of the driving cylinder and the driven cylinder are communicated and rod cavities of the driving cylinder and the driven cylinder are communicated; the controller is respectively and electrically connected with the redundancy inclined angle sensor and the proportional solenoid valve; the redundancy inclined angle sensor is used for feeding a detection result back to the controller; an output signal of the controller drives the opening and closing of the proportional solenoid valve; the proportional solenoid valve (3) can be used for carrying out oil supplementation on oil leaking cavities in the driving cylinder (1) and the driven cylinder (4). With the adoption of the system, the leveling process is safe and convenient and does not need to be subjected to artificially interfered; the problem that a working platform of an overhead working truck is inclined, caused by leaking of oil, is solved.

The method obtains a correlation linear matrix which is convenient for experimental measurement by utilizing perturbation theory and approximate method to establish simple matrix algorithm in depending upon relation of FRA gain spectrum variation amount and multiwavelength pumping light power regulation amount based on FRA actual operation state in engineering system of wavelength division multiplexing. To calculate out the corresponding regulation value of pumping light power according to the differential value of gain spectrum at monitored apparent gain spectrum off-flag, the on-line dynamic feedback regulation and control can be achieved for FRA power and gain spectrum in large scale of dynamic scope.

The invention relates to a soft sensing method for SO2 emission of a power plant based on variable compression BP neural network, comprising the steps of S1, collecting sample data about time variation in a wet flue gas desulfurization system, and determining neurons of an input layer and an output layer of the dynamic neural network according to the collected sample data; 2, performing correlation analysis on that sample data, compressing the original sample variable to remove sample data whose correlation with SO2 in the flue gas at the outlet of the wet flue gas desulfurization system is less than 0.2; Step S3: Compressing by using the variable-BP neural network model wet flue gas desulfurization system, establish wet flue gas desulfurization system prediction model; Step S4, calculating the predicted value of SO2 concentration at the flue gas outlet of the wet flue gas desulfurization system by using the wet flue gas desulfurization prediction model established in the step S3; StepS5: controlling The slurry spraying amount of the wet flue gas desulfurization system by using the predicted value of step S4.