44results about How to "Strong engineering feasibility" patented technology

The invention discloses a wheel service state safety margin estimation and fault diagnosis method. The wheel service state safety margin estimation and fault diagnosis method comprises the following steps of firstly carrying out feature extraction for a steel rail vibration signal, decomposing the steel rail vibration signal by adopting an EMS (Empirical Mode Decomposition) method, calculating related characteristic indexes of each IMF (Intrinsic Mode Function) to serve as a characteristic vector of a wheel service state; secondly, classifying normal and fault states by utilizing LSSVM based on state characteristic vectors of steel rail vibration signals of a normal wheel and a faulted wheel, obtaining a safety margin of a train wheel and estimating the train wheel service state; and finally, carrying out fault mode identification for a normal wheel, a flat damage wheel and an out-of-round wheel by adopting a PNN (Probabilistic Neural Network), and providing reference basis for a vehicle maintenance department. The wheel service state safety margin estimation and fault diagnosis method has the advantages of high reliability and good engineering feasibility.

The invention discloses a large phased array antenna accurate installation method based on mathematical modeling, is suitable for single-wing or double-wing large phased array antenna accurate installation and adjustment and measurement of large size and high requirement of installation accuracy, and belongs to the field of microwave remote sensing general installation design. The method comprises the steps that (1) a star coordinate system is established; (2) fine adjustment of the star attitude is performed; (3) the coordinates of the installation points on the antenna and the start are measured; (4) a mathematical model is established and a gasket is calculated and adjusted; (5) the gasket is additionally arranged to install the antenna according to the calculation result; and (6) the planar integrated direction is measured and the gasket is corrected. The problems of the influence of repeated trial installation and adjustment of the large phased array antenna on the antenna installation accuracy and efficiency can be avoided so that the method has the advantages that project implementation is high, the installing accuracy can be easily guaranteed, the frequency of installation and adjustment and accurate measurement can be reduced and the installation efficiency can be enhanced.

The invention relates to car body design field in particular to car body structure optimization system which is based on the stable design. The invention is characterized in that CUI module is the graph user interface that the users use; the middle result and last result of the module in the interactive operation process is received; the variable definition module is responsible for the determination of designing variable and noise factors and transfer the results to CUI module; response face modeling module is responsible for buliding designing variable, noise factors and mathematical model of car body structure property index and then transfering to CUI module and stable optimization module; the stable optimization module builds stable desiging rule function and property probabiligy limiting relationship and completes the buliding of stable structure optimization mathematical model, then get the best stable designing result of the stable structure optimization mathematical model by optimization and transfer the best result to CUI module. The invention has the advantages that the invention relates to the influence that the designing variable and noise factors differences works on the structure property index; the propabiligy caculation of the property limiting function is accurate.

The invention discloses a method for vehicle oil consumption statistics. According to the method, the OBD interface of an oil consumption statistic device is connected to the OBD interface of a vehicle-mounted diagnosis system so as to collect the realtime work condition data of the vehicle; according to the information such as the equivalent ratio Vlambda of a linear or broadband type oxygen sensor, the air intake flow value Vmaf of the vehicle engine, and the like, by combining the vehicle's archival information, the realtime oil consumption of the vehicle can be calculated by an instant oil consumption calculation formula, and thus the oil consumption statistics can be achieved. The OBD interface of an oil statistic device is inserted into an original OBD interface of a vehicle to collect the vehicle work condition data, the original circuit of the vehicle does not to be broken or changed, the installation is convenient, the method is practical and safe, the quality guarantee of the vehicle will not be influenced, and thus the method can be accepted by the customers more easily. The oil consumption calculated through the work condition data will not be influenced by the external environment or road condition during the driving process, the precision is high, moreover, the realtime oil consumption of the vehicle can be calculated, and the oil consumption data precise synchronous comparison and analysis can be realized.

The invention relates to a short-cut denitrification process adopting catalytic iron and biological coupling. The denitrification process comprises a catalytic iron biological denitrification section and a biological nitrosation section. In the catalytic iron biological denitrification section, wastewater enters the catalytic iron biological denitrification section, and the hydraulic retention time is controlled to be 20 minutes to 2 hours; the reflux ratio of mixed liquor is 100-300%; catalytic iron stuffing is arranged internally and the stacking density is 50-200 kg / M<3>. In the biological nitrosation section, when the number of structural-state ferrous iron Fe (II) formed by catalytic iron in the denitrification section is sufficient, the oxidation reduction potential (OPR) in the nitrosation section is controlled to be 40-100 mV; the hydraulic retention time in the nitrosation section is controlled to be 6-10 hours; when the number of structural-state ferrous iron Fe (II) formed by catalytic iron in the denitrification section is insufficient for producing a nitrite reduction reaction, the catalytic iron stuffing can be put at the front end of the nitrosation section at the same time, the generation of structural-state ferrous iron Fe (II) is accelerated by dissolved oxygen in the nitrosation section, a catalytic iron stuffing arrangement region is positioned at the front section of the biological nitrosation section, the hydraulic retention time is 1.0 hour, and the stacking density is 50-200 kg / M<3>. The short-cut denitrification process greatly reduces organic carbon sources required by denitrification and greatly shortens nitrification and denitrification processes.

The invention provides a passive tire power generating device and a tire parameter detecting system. The temperature difference between the high temperature generated when a tire operates and the temperature of the external environment is used by the power generating device, electric energy is generated through a thermoelectricity collecting piece, and the electric energy provides a power supply through a storing and converting circuit and a transmitting circuit. The tire parameter detecting system comprises a parameter sensor, a wireless transmitter and a central receiver module. The passive tire power generating device is used for providing electric energy for the tire parameter sensor and the wireless transmitter. The passive tire power generating device is installed on the tire, and the tire parameter sensor is installed in the tire to measure the parameters of the tire. Parameter information of the tire is transmitted to the central receiver module from the interior of the tire through the wireless transmitter, and the tire parameters are then displayed. The problem of power supply of a tire pressure detector in a direct type tire pressure monitoring system is solved; the tire parameter detecting system is different from other passive tire parameter detecting systems in terms of tire parameter detection and is independent of tire pressure and vehicle vibration work; an energy transmission coil which is high in cost and complicated in installation does not need to be introduced into the system.

The invention relates to car seats, in particular to a car seat with an automatic folding and turning function. The car seat mainly comprises a backrest tube framework (1), a backrest and cushion linkage unlocking mechanism (2), a cushion tube framework (4), a turning mechanism (6) and a cushion turning mechanism (7). The backrest tube framework (1) is connected with the cushion tube framework (4). The backrest and the backrest and cushion linkage unlocking mechanism (2) are disposed on the backrest tube framework (1). The turning mechanism (6) is disposed on the cushion tube framework (4). The cushion turning mechanism (7) is disposed on the cushion tube framework (4). The car seat has the advantages that the car seat satisfies the requirements of national mandatory laws and regulations, get on and get off convenience of passengers is increased, the safety performance level of a whole car is increased, onerous operation steps are eliminated, performance level of the whole car is increased, user experience is increased, and problems of seat loosening and abnormal sounds are solved by means such as backrest coil spring assisting design.

The invention discloses a heat dissipation device and system for a blade server chip. The heat dissipation device comprises a first embedded heat pipe, a second embedded heat pipe arranged below the first embedded heat pipe and a blade server. The first embedded heat pipe comprises a first evaporator, a long gas pipeline, a long liquid pipeline and a first fin condenser which are connected in sequence. The second embedded heat pipe comprises a second evaporator, a short gas pipeline, a short liquid pipeline and a second fin condenser which are connected in sequence. The blade server comprises a first chip and a second chip which are arranged in the blade server, wherein the first evaporator and the second evaporator are in contact with and fixed with the first chip (301) and the second chip (302) respectively. A heat dissipation structure is simplified, the heat dissipation efficiency is improved, and the device cost is reduced.

The invention relates to a calibration device and method for a sound wave scattering region of a Doppler current meter. The device comprises a standard plate (3), an upper damper (4), a lower damper (5), a first connecting rod (61), a second connecting rod (62) and a moving mechanism. The standard plate (3) is formed by connecting the round tubes to each other. One end of each of the round tubes is provided with a long cone (34), and the other end is provided with a short cone (31). The moving mechanism includes a first guide rail (71), a first linear stepping motor (72), a rotary stepping motor (73), a turntable (74), a second linear stepping motor (75) and a second guide rail (76). The first connecting rod (61) is a straight rod, the second connecting rod (62) includes an upper verticalrod (621), a horizontal rod (622) and a lower vertical rod (623), and the axis of the lower vertical rod (623) and the rotation axis of the rotary stepping motor (73) are in the same straight line. The effective acoustic scattering region of the Doppler current meter can be accurately calibrated.

The invention discloses a shield double-layered space combined metro station and relates to the technical field of shield tunnel metro stations. A #1 shield double-layered tunnel communicates with a #2 shield double-layered tunnel through a cross-linking channel; the #1 shield double-layered tunnel and the #2 shield double-layered tunnel are divided into double-layered spaces through middle plates, and a #1 line is arranged in the lower space of the double-layered space of the #1 shield double-layered tunnel; a #2 line is arranged in the lower space of the double-layered space of the #2 shield double-layered tunnel; platforms are arranged on one sides of the #1 line and the #2 line, escalators are arranged on one sides of the platforms, and both the platforms and the escalators are arranged in the upper spaces of the double-layered spaces; and inlet and outlet channels are arranged on one sides of the tops of the #1 shield double-layered tunnel and the #2 shield double-layered tunnel. The shield double-layered space combined metro station can meets the process and function of the station effectively, and meanwhile, is high in engineering exploitativeness, so that the construction risk can be reduced, pipeline migration and modification are reduced, traffic reconciliation is optimized, and the practicality is higher.

The invention discloses a building trough vibration isolator. The vibration isolator comprises a vibration isolator body. The vibration isolator body is arranged in a trough which is reserved between one side of a building and the side wall of a foundation pit. The vibration isolator body comprises a waterproof layer, an elastic damping layer, a concrete layer and a rubber base plate. The waterproof layer, the elastic damping layer and the concrete layer are arranged in the trough and cling to the trough. The rubber base plate is arranged between the concrete layer and soil on the bottom of the foundation pit. By means of the trough space design of the vibration isolator, the structure design is reasonable, the engineering implementation is easy and the vibration which transmits from the side wall of the foundation pit to the building foundation can be effectively isolated under the premise of guaranteeing the safety of the building.

The invention discloses an integrated device for ecological purification of domestic wastewater of a small scattered river suspended sewage outlet. The integrated device comprises a sewage outlet wastewater collector, an up-flow precipitation sand filtration tank, a three-section ecological purification cage and a solar aerating system, wherein the three-section ecological purification cage comprises an anaerobic treatment bag, a solar driving contact oxidation bag and a deep adsorption sewage removing water discharger which are connected with one another from end to end. The device is used for collecting the wastewater of the wastewater outlet by using the wastewater collector; the wastewater flows through the up-flow precipitation sand filtration tank and then enters the three-section ecological purification cage; the three-section ecological purification cage is formed by processing and assembling a waterproof cylinder and a plastic flange; the wastewater is finally discharged into the river by virtue of a water outlet; meanwhile, the three-section ecological purification cage is fixed on the inner side of the river bank by an anchor rod; a falling-off biological film generated by the device can be artificially cleaned; the device is novel and simple in structure, convenient to maintain, free of extra energy consumption, excellent river landscape effect, free of influence on the flood control safety and high in values of application and popularization.

The invention relates to a recycling method of a hydrocarbon oil metal-removing agent. According to the invention, the hydrocarbon oil metal-removing agent is sufficiently mixed with hydrocarbon oil, and the mixture is processed through a common electrostatic desalting process, such that metal-ion-removed hydrocarbon oil is obtained; a desalting solution containing the metal ions is filtered, and is subject to ion exchange with ion exchange resin filled in a double-layered bed ion exchanger, such that a recycled water solution containing the hydrocarbon oil metal-removing agent is obtained; the recycled water solution containing the hydrocarbon oil metal-removing agent is well mixed with hydrocarbon oil and is reused; the failed ion exchange resin is processed through a regeneration treatment, and is repeatedly used. In prior arts, solid-liquid separation is not sufficiently carried out, part of metal salt slag which is not easily soluble or insoluble in water enters the electrostatic desalting system along with the circulated water solution, such that normal operation of the apparatus is influenced; also, a precipitant is over-dosed, such that apparatus corrosion is caused. With the method provided by the invention, the defects are overcome. The method is advantaged in environment friendliness and high metal removing rate.

The invention discloses a metro station with double-hole double-layer ejector pipe space combination, and relates to the technical field of metro stations. The metro station comprises a first ejectorpipe double-layer tunnel and a second ejector pipe double-layer tunnel which are symmetrically arranged. The first ejector pipe double-layer tunnel communicates with the second ejector pipe double-layer tunnel through a transverse connecting channel. The outer sides of the tops of the first ejector pipe double-layer tunnel and the second ejector pipe double-layer tunnel are each provided with an inlet and outlet channel. Inner spaces of the first ejector pipe double-layer tunnel and the second ejector pipe double-layer tunnel are each divided into an upper layer space and a lower layer space through structural plates. Each upper layer space is internally provided with a platform and an escalator. A first line is arranged in the lower layer space of the first ejector pipe double-layer tunnel, and a second line is arranged in the lower layer space of the second ejector pipe double-layer tunnel. The metro station can effectively meet the station process and function, meanwhile, the project practicability is high, the construction risk can be reduced, pipeline relocation is reduced, traffic reconciliation is optimized, and the practicability is higher.

The invention discloses a bio-remediation method of hexachlorobenzene-contaminated soil, which comprises the following steps: preparing soil particles; adding deoxidized distilled water and a small-molecular organic acid nutrition source; regulating the initial pH value of the reaction system; adding nitrogen to create an oxygen-free environment; and performing an anaerobic degradation reaction by use of indigenous microorganisms in the soil, etc. According to the characteristics of strong vitality, adaptability and decomposition capacity of the indigenous microorganisms in the environment contaminated for long time, the method disclosed by the invention makes full use of the anaerobic indigenous microorganisms in the hexachlorobenzene-contaminated soil and directly performs quick remediation on the hexachlorobenzene-contaminated soil by use of the indigenous microorganisms in the soil under the condition of adding the small-molecular organic acid as a nutrition source. The method is simple and convenient to operate, the reaction conditions are mild, the operation cost is low, secondary pollution is avoided, the reaction time is short, and the engineering feasibility is high. The removal rate of hexachlorobenzene in the remediated contaminated soil is close to 60%, and thus the harm to the environment and human body caused by the hexachlorobenzene-contaminated soil is greatly reduced.

The invention relates to a traveling wave differential protection method and system for VSC-MTDC. The method comprises a step of obtaining a local line mode voltage and a local line mode current of acalibration line in a multi-terminal flexible direct current transmission grid and determining a local line mode voltage change rate and a local line mode current change rate, a step of determining traveling wave energy according to the local line mode voltage change rate and the local line mode current change rate and determining whether the multi-terminal flexible direct current transmission grid is failed according to the traveling wave energy, and a step of performing Boolean-based identification on a failure type according to the traveling wave energy when a condition that the multi-terminal flexible direct current transmission grid is failed is determined and performing corresponding protection on the calibration line according to the identified and determined failure type. Accordingto the technical scheme of the invention, protection devices on two sides of the line do not need to be synchronized, the amount of information exchanged between the two devices is small, and the engineering implementability is high.

The invention discloses an out-of-step oscillation center positioning system and method based on wide-area measurement impedance angle information. According to the system and the method, real-time oscillation direction information sent by a plurality of out-of-step solution substations deployed on the two sides of a power transmission section channel in a regional interconnected power grid in theout-of-step oscillation process is comprehensively utilized in a control main station, and the position of an oscillation center is accurately judged in real time. According to the method, a master station and a plurality of substations are included, and the substations communicate with the master station through 2M multiplexing optical fiber channels. The substation collects voltage and currentdata of a section channel line, calculates and measures an impedance phase angle in real time through the voltage and current data, judges the direction of an oscillation center in real time accordingto the size distribution of the phase angle in fixed time, and sends the direction of the oscillation center to the main station in real time. And the main station can judge the position of the oscillation center in real time according to the oscillation direction information sent by each substation and a preset logic strategy. The position of the oscillation center can be accurately judged in real time.

The invention discloses a periodic microstructure noise reduction device and a noise suppression test system and method. The test system comprises a silencing wind tunnel, noise sensors and a model test piece. The model test piece adopts a periodic microstructure noise reduction device and is arranged in the silencing wind tunnel; the periodic microstructure noise reduction device comprises a reference cylinder, radial protruding structures are periodically arranged on the reference cylinder in the axial direction, the diameter of the reference cylinder is D, the length of the reference cylinder is L, the setting period is S, the outer diameter of each radial protruding structure is A, and the thickness of each radial protruding structure is B; and the plurality of noise sensors are arranged in the silencing wind tunnel in an arc-shaped array manner along the airflow direction by taking the center of the model test piece as a circle center. According to the test system provided by the invention, the noise generated by the airflow on the model is acquired through the plurality of noise sensors, and the change of a noise single-tone signal and an overall broadband signal is analyzed, so that a research basis is provided for noise suppression.

The invention discloses installation arrangement of a satellite-borne magnetometer, comprising solar wings connected with a satellite body and a solar wing sailboard, wherein a bracket for installing the magnetometer is arranged at the outer side of the solar wing. The satellite body is connected with the solar wing sailboard through a hinge; the solar wing sailboard is connected with the bracketof the magnetometer through a hinge; and probes of the magnetometer are respectively fixed on the bracket of the magnetometer through bolts. The invention has simple theory and engineering feasibility, meets the technical requirements of specially using an extension mechanism to ensure that a residual magnetic index at installation position of the two probes of the magnetometer is less than 0.5 nT, optimizes the whole satellite arrangement design, saves weight for the whole satellite design, and avoids the design of complex extension mechanism. The invention has the advantages of shortening development cycle, saving development cost and the like.

The invention discloses a small-scale decentralized integrated device for ecological purification of domestic sewage at a suspended sewage outlet of a river, which includes a sewage collector at the sewage outlet, an upflow sedimentation sand filter, a three-stage ecological purification cage and a solar aeration system; the three sections The ecological purification cage is composed of an anaerobic treatment bag, a solar-driven contact oxidation bag and a deep adsorption decontamination water outlet end-to-end; the device collects the waste water from the sewage outlet through the waste water collector, and enters the third section after flowing through the upflow sedimentation sand filter Type ecological purification cage, the three-stage ecological purification cage is composed of waterproof cylinder and plastic flange, and finally discharged into the river through the outlet; at the same time, the three-stage ecological purification cage is fixed on the inner side of the river bank by anchor rods, and the device The resulting exfoliated biofilm can be manually removed. The device has novel and simple structure, convenient maintenance, no additional energy consumption, good river landscape effect, and does not affect flood control safety, and has strong application and promotion value.

The invention discloses a building trough vibration isolator. The vibration isolator comprises a vibration isolator body. The vibration isolator body is arranged in a trough which is reserved between one side of a building and the side wall of a foundation pit. The vibration isolator body comprises a waterproof layer, an elastic damping layer, a concrete layer and a rubber base plate. The waterproof layer, the elastic damping layer and the concrete layer are arranged in the trough and cling to the trough. The rubber base plate is arranged between the concrete layer and soil on the bottom of the foundation pit. By means of the trough space design of the vibration isolator, the structure design is reasonable, the engineering implementation is easy and the vibration which transmits from the side wall of the foundation pit to the building foundation can be effectively isolated under the premise of guaranteeing the safety of the building.

The invention discloses a bio-remediation method of hexachlorobenzene-contaminated soil, which comprises the following steps: preparing soil particles; adding deoxidized distilled water and a small-molecular organic acid nutrition source; regulating the initial pH value of the reaction system; adding nitrogen to create an oxygen-free environment; and performing an anaerobic degradation reaction by use of indigenous microorganisms in the soil, etc. According to the characteristics of strong vitality, adaptability and decomposition capacity of the indigenous microorganisms in the environment contaminated for long time, the method disclosed by the invention makes full use of the anaerobic indigenous microorganisms in the hexachlorobenzene-contaminated soil and directly performs quick remediation on the hexachlorobenzene-contaminated soil by use of the indigenous microorganisms in the soil under the condition of adding the small-molecular organic acid as a nutrition source. The method is simple and convenient to operate, the reaction conditions are mild, the operation cost is low, secondary pollution is avoided, the reaction time is short, and the engineering feasibility is high. The removal rate of hexachlorobenzene in the remediated contaminated soil is close to 60%, and thus the harm to the environment and human body caused by the hexachlorobenzene-contaminated soil is greatly reduced.

The invention discloses a method for in-orbit identification of moment-of-inertia of spacecraft with flexible attachment in a large angle maneuver, and the method comprises the following steps: S1) according to the altitude dynamic equation of the spacecraft and the motion equation of the flexible attachment, establishing a nonlinear system dynamic model; S2) using the angular velocity data collected by a gyroscope and the control moment data of the spacecraft maneuvering and utilizing the generalized Kalman filter algorithm to estimate the vibration mode of the flexible attachment and its derivatives; S3) writing the attitude dynamic equation of the satellite with the flexible attachment in the form of least squares; using the second derivative (described in the abstract) of vibration mode estimated in S2 and using the least squares algorithm to identify the moment-of-inertia of the satellite; and S4) mutually calling the vibration mode estimated from the generalized Kalman filter algorithm in S2 and the moment-of-inertia identified from the lease squares in S3; repeating S2 and S3 steps; and through the combination and the recursion of the generalized Kalman filter and least squares method, obtaining the identification value for the moment-of-inertia.

The invention discloses a system and method for regulating the temperature of an environmental wind tunnel test cabin. The system includes a main heat exchanger, a cooling pipeline and a heating pipeline, and the cooling pipeline and the heating pipeline are connected in parallel between the inlet and outlet of the main heat exchanger ; The cooling pipeline includes the first cooling branch, the second cooling branch and the third cooling branch arranged in parallel, which exchange heat with the exchangers circulating cooling water, frozen water and deep cooling water respectively; the first cooling branch The first on-off valve is set on the cooling line, the second on-off valve is set on the second cooling branch, and the third on-off valve is set on the third cooling branch; the first three-way regulating valve and the second three-way regulating valve are arranged in parallel on the cooling line. valve; the heating pipeline is provided with a third three-way regulating valve. The method of the present invention is applied to the system described above. The invention significantly improves the control accuracy level and response speed of the temperature regulation of the environmental wind tunnel test chamber, and the system and method of the application have a clear and simple logical structure, high reliability, and strong engineering implementability.

The invention belongs to the field of aircraft system design, and particularly relates to a radiator performance evaluation method under an air inlet distortion condition. Comprising the steps of 1, obtaining radiator wind resistance characteristic and heat exchange characteristic data; 2, calculating an air inlet distortion index under the working condition of the radiator; 3, calculating the wind resistance characteristic and the heat exchange characteristic of the radiator after correction; and 4, drawing a new wind resistance characteristic curve and a new heat exchange characteristic curve. According to the radiator performance evaluation method under the air inlet distortion condition, the wind resistance characteristic and the heat exchange characteristic of the oil cooling radiator under the non-uniform air inlet condition can be corrected, the performance calculation deviation caused by evaluation according to the uniform air inlet condition is eliminated, and the situation that the performance of a cooling system does not reach the standard actually is avoided. The method is simple in principle, high in calculation accuracy and high in engineering feasibility.

The invention discloses installation arrangement of a satellite-borne magnetometer, comprising solar wings connected with a satellite body and a solar wing sailboard, wherein a bracket for installing the magnetometer is arranged at the outer side of the solar wing. The satellite body is connected with the solar wing sailboard through a hinge; the solar wing sailboard is connected with the bracketof the magnetometer through a hinge; and probes of the magnetometer are respectively fixed on the bracket of the magnetometer through bolts. The invention has simple theory and engineering feasibility, meets the technical requirements of specially using an extension mechanism to ensure that a residual magnetic index at installation position of the two probes of the magnetometer is less than 0.5 nT, optimizes the whole satellite arrangement design, saves weight for the whole satellite design, and avoids the design of complex extension mechanism. The invention has the advantages of shortening development cycle, saving development cost and the like.

The invention relates to car seats, in particular to a car seat with an automatic folding and turning function. The car seat mainly comprises a backrest tube framework (1), a backrest and cushion linkage unlocking mechanism (2), a cushion tube framework (4), a turning mechanism (6) and a cushion turning mechanism (7). The backrest tube framework (1) is connected with the cushion tube framework (4). The backrest and the backrest and cushion linkage unlocking mechanism (2) are disposed on the backrest tube framework (1). The turning mechanism (6) is disposed on the cushion tube framework (4). The cushion turning mechanism (7) is disposed on the cushion tube framework (4). The car seat has the advantages that the car seat satisfies the requirements of national mandatory laws and regulations, get on and get off convenience of passengers is increased, the safety performance level of a whole car is increased, onerous operation steps are eliminated, performance level of the whole car is increased, user experience is increased, and problems of seat loosening and abnormal sounds are solved by means such as backrest coil spring assisting design.

The invention discloses a method for processing a bracket mounting surface meeting the assembly requirement of a solar wing with a dip angle, and belongs to the technical field of spacecraft structure design. The method solves the problem that in the existing process of installing the large solar wing with the certain dip angle, the installation and adjustment operation is complex due to the fact that the requirement for the plane precision of an installation face of an initiating explosive device pressing base is higher. According to the assembling precision requirement of the large solar wing, errors are decomposed in the direction perpendicular to a supporting cellular board and the direction parallel to the supporting cellular board, and the errors perpendicular to the supporting cellular board are compensated by machining a heat insulation pad into different thicknesses. The errors parallel to the supporting cellular board are controlled through the relative position degree error of second pin holes and the position degree error of a bracket in the direction parallel to the supporting cellular board.

Through combination of characteristics of a broadband digital array radar and a recent development level of a current digital signal processor and through theoretical derivation and computer simulation, a broadband digital beam forming method based on radio frequency direct sampling is researched, and a broadband digital array transmitting and receiving beam forming method with good engineering feasibility is provided. The method comprises the following steps of receiving a broadband radar echo signal; obtaining a digital radio frequency signal through radio frequency sampling; and carrying out digital phase shift and integer delay processing on the digital radio frequency signal, thereby finishing broadband digital beam forming processing. The method is not limited by a concrete form andarray manifold of the radar signal. Accurate beam pointing and an approximately ideal main lobe can be realized. Computing quantity is low. The engineering realizability is relatively high. Through control over a signal bandwidth, an ADC sampling frequency and a sampling frequency and signal bandwidth ratio, a sidelobe level of the signal can be controlled.