550results about How to "Improve anti-interference ability" patented technology

A navigation system provides a significant level of protection against all forms of interference or jamming to GPS in a cost-effective way. The system employs a network of ground reference stations and Low Earth Orbiting (LEO) satellites in conjunction with GPS. A common-view ranging geometry to a GPS satellite is established that links a reference station and a user. A second common-view geometry to a LEO satellite between the same reference station and user pair is also established. The ground stations synthesize real-time aiding signals by making carrier phase measurements of GPS the LEO satellite signals. This aiding information is transmitted via the LEO satellites to the user receiver at high power to penetrate ambient jamming. The user receiver locks onto the carrier phase of the LEO satellite, demodulates the aiding information, then applies the carrier phase measurements and the aiding information to enable extended coherent measurements of the GPS signals. The system thereby recovers the GPS signals that would otherwise be lost to the jamming.

The invention relates to an unmanned aerial vehicle formation distributed collaboration system and an anti-interference method of the unmanned aerial vehicle formation distributed collaboration system. The unmanned aerial vehicle formation distributed collaboration system comprises multiple unmanned aerial vehicles and a base station for managing the unmanned aerial vehicles. Each unmanned aerial vehicle is provided with the same antenna structural unit. A self-inspection system is arranged in the base station. The self-inspection system can finish self-inspection work of hardware of the base station and software running on the base station and can also finish self-inspection work of hardware of the unmanned aerial vehicles capable of being controlled by the base station and software on the unmanned aerial vehicles. The unmanned aerial vehicles execute flight and set lacing tasks according to dispatching commands of the base station, the unmanned aerial vehicles collaboratively finish the same set target task, the set target task is formed by integrating the set lacing tasks finished by the unmanned aerial vehicles, during flight of the unmanned aerial vehicles executing the flight and the set lacing tasks, the unmanned aerial vehicles select a linear array or a round array or a rectangular array for enqueue flight, and the anti-interference capacity of the system is high.

The invention discloses a face authentication method, which comprises the following steps: collecting multi-frame images containing a same unauthenticated face target to obtain sample features of each frame image containing the same unauthenticated face target; utilizing a sorter judgment model obtained after the training according to a feature database, so as to carry out the authentication of the sample features of each frame image containing the same unauthenticated face target; updating the feature database at least once in previous authentication processes; syncretizing the authentication result of the sample features of the multi-frame images containing the same unauthenticated face target to obtain the authentication result of the target; adding all the sample features of the unauthenticated face target with a confidence level of the syncretized authentication result higher than a preset confidence threshold into the feature database, so as to realize the update of the feature database. The invention also discloses a face authentication system. The face authentication method and the system of the invention can realize automatic updating of the authentication target samples, so as to improve the anti-interference ability of the face authentication system.

The invention provides a method for locating a human body through a wall and belongs to the technical field of radar detection. The method comprises the following steps: 1) preprocessing echo signals of two receiving antennae to form two quick and slow time data matrixes; 2) performing moving target indication (MTI) filtering; 3) performing band-pass filtering; 4) performing fast Fourier transform (FFT) spectrum analysis on two quick and slow time data matrixes which are subjected to the band-pass filtering respectively to form two range delay-Doppler frequency (RD) data matrixes; 5) detecting two-dimensional adaptive cell average constant false alarm rate; 6) estimating the echo distance delay of a static human body corresponding to the two receiving antennae by use of a moving window extremum method on two detected RD planes to; and 7) carrying out elliptical cross positioning. The method ensures the accuracy of static human body echo delay estimation through frequency domain accumulation of respiratory character signals, combined inhibition of various different clutters and elimination of range delay fuzzy so as to realize the accurate positioning of a static human body, and has the prominent advantages of strong interference resistance, high positioning accuracy and strong practicality.

The method comprises: receiving the capacitance value signal outputted from the imbibe probe; according to the variation of the capacitance, outputting the voltage signals corresponding to the capacitance; deciding if the voltage value of current voltage signal is less than a threshold value; if yes, then calculating the gradient of neighboring voltage signals; deciding if the gradient is more than a gradient threshold; if yes, adding 1 in the first fluid level blip counter; if not, subtracting 1 in the first fluid level blip counter; deciding if the first fluid level blip counter value is more than or equals a first preset value; if yes, then outputting the fluid surface touching indication signal.

The invention discloses a composite electromagnetic shielding paint based on a nano carbon material. The composite electromagnetic shielding paint is prepared by mixing composite shielding materials such as nano carbon particles, nano graphene, carbon nanotube, carbon fiber, ferriferrous oxide particles, iron and nickel carbonyl particles with a polymer emulsion, a coupling agent, a dispersant, an antifoaming agent, a film forming auxiliary agent, a thickening agent and the like. The employed electromagnetic shielding paint has the advantages of low density and wide absorption band, and can be widely used in electromagnetic shielding engineering, and thereby, electromagnetic wave can be shielded and absorbed, electromagnetic interference is reduced, and electromagnetic environment pollution can be avoided.

The invention provides a time-of-flight depth camera, which includes a transmitting module used for transmitting a light beam, a collecting module used for collecting a reflected light beam, and a processing circuit connected with the transmitting module and the collecting module and used for calculating the time of flight between the transmitted light beam and the reflected light beam. The transmitting module includes a light source, a time light modulator and a space light modulator. The time light modulator is used for making the light source emit corresponding carrier beams with one time carrier signal. The space light modulator is used for modulating the carrier beams spatially to form non-flooding carrier beams and emitting the non-flooding carrier beams outward. The collecting module includes an array pixel unit and a lens unit. The lens unit is used for receiving and imaging at least part of the non-flooding carrier beams reflected by an object on at least part of the array pixel unit. Non-flooding carrier beams are formed through modulation of the light source by the time light modulator and the space light modulator, so as to enhance the anti-interference ability of the time-of-flight depth camera to ambient light and reduce power consumption.

The invention provides a bridge displacement monitoring system based on optical fiber sensors. The bridge displacement monitoring system comprises at least one fiber grating strain sensor group, a fiber grating demodulating instrument and a monitoring host. The fiber grating strain sensor group is fixed on monitoring points of a bridge and used for monitoring transverse deformation, longitudinal deformation and vertical deformation of the bridge. The fiber grating demodulating instrument is connected with the fiber grating strain sensor group through transmission optical fibers. Detecting light emitted from a light source inside the fiber grating demodulating instrument shoots into all fiber grating displacement sensors in a monitoring area. The fiber grating demodulating instrument is used for demodulating wavelength sensing signals generated by the fiber grating strain sensor group. The monitoring host is used for receiving demodulation data of the fiber grating demodulating instrument through a communication network and analyzing the displacement state and the health status of the bridge based on the demodulation data. Through adoption of the fiber grating sensing technology and utilization of communication optical fibers and cables to transmit the sensing signals, the bridge displacement monitoring system based on the optical fiber sensors has the advantages of being strong in anti-interference capacity, high in sensitivity, good in stability, free from power supply in a monitoring field, and capable of achieving displacement state monitoring of the long-distance bridge, and the like.

The invention relates to a method for controlling the tobacco drying process, which is characterized in that the whole tobacco drying process is divided into a head stage, a middle stage, and a tail stage; the head stage adopts an adaptive learning temperature rising control method, a control system automatically adjusts the temperature in the next temperature rising according to the previous humidity control effect, and the low drum speed is adopted in the heat stage; the middle stage leads water parameters at an outlet into the control system, forecast PID control is adopted to feed back and correct to realize the automatic control for the temperature of the cylinder wall of a tobacco drying cylinder; the tail stage lowers the temperature of the tobacco drying cylinder in advance, closes a steam heater on the cylinder wall and a cyclic hot blast heater in advance, increases the air intake speed, reduces the drawing air speed, and accelerates the drum speed. The tobacco drying process controlling means has the advantages that the influence on the moisture content at the tobacco drying outlet caused by the nonlinearity and the large time delay during the original tobacco drying procedure control process is overcome, the anti-interference ability is strong, various changes of operation conditions can be adapted, and the control of the moisture content at the tobacco drying outlet can be led to achieve higher control precision.

The invention relates to a multichannel nuclear magnetic resonance underground water detecting instrument and a field work method thereof. Working parameters of a transmitter and all receivers are configured by a computer, and operating modes of all receivers can be switched between a nuclear magnetic resonance measurement mode and a reference nuclear magnetic resonance measurement mode. Each receiver can connect receiving coils and reference coils, selection of the number of the reference coils can be determined according to a local environmental noise level, and at most eight reference coils can be connected. When the multichannel nuclear magnetic resonance underground water detecting instrument with the reference coils is used, denoising processing is conducted on an obtained nuclear magnetic resonance signal by a self-adaption denoising algorithm, and two-dimension detection on an underground water body is achieved by a multichannel measurement mode. When a transverse resolution of detection is effectively improved, simultaneously signal to noise ratio of the nuclear magnetic resonance signal is improved. The multichannel nuclear magnetic resonance underground water detecting instrument and the field work method thereof are beneficial to conducting nuclear magnetic resonance detection on a detected area under a complex geomorphological condition and a large-noise environment.

The invention relates to the technical field of image processing, in particular to a target tracking method and a target tracking device. The method includes: acquiring a current frame image during target tracking, comparing the current frame image to a previous frame image to obtain a frame difference template; performing foreground detection by the current frame image and a pre-established background template to obtain a foreground template; fusing and processing the frame difference template and the foreground template to obtain a foreground image of a candidate area after fusion; and tracking a determined tracking target in the foreground image of the candidate area. Most background interference is eliminated from the foreground area of the extracted fused candidate target, so that the target can be tracked in the effective area, chances of getting trapped in local peaks during target tracking are slimmed, interference resistance of the target tracking method is further improved and algorithmic accuracy and robustness are improved.

The invention provides an integrated fluid sensor capable of simultaneously measuring the density, pressure and temperature of a fluid based on a micro-electromechanical system (MEMS) technology. The integrated fluid sensor comprises a substrate which is provided with a cavity, wherein a permanent magnet is arranged on an internal wall of the base; an integrated sensor chip and a glass base are packaged together and then packaged at the bottom of the substrate; a liquid through hole through which the fluid flows in and out is formed in the bottom of the substrate; an opening which is communicated with the liquid through hole is formed on the glass base and used for immersing the substrate into the fluid; the integrated sensor chip is connected with a printed circuit board (PCB) adapter plate through a pad of the integrated sensor chip and then output through a signal line; the integrated sensor chip comprises a density sensor chip, a pressure sensor chip and a boron-doped thermosensitive resistor which is integrated on the surface of the density sensor chip; the density sensor chip introduces an alternating current through two pads on the density sensor chip; and the pressure sensor chip has a distributed beam film structure. The integrated fluid sensor can measure the density, pressure and temperature of the fluid at the same time, and has higher sensitivity and lower non-linearity. The anti-interference performance of the sensor is improved.

The invention discloses a receiving method of spread spectrum signals and belongs to the technical field of spread spectrum communication. The method comprises the following steps of: respectively receiving the spread spectrum signals by using at least two antennae; carrying out blind source separation by using at least two received signals as observation signals; and identifying separation signals which are obtained by the blind source separation, and determining useful signals and interference signals. The invention also discloses a receiving device of the spread spectrum signals and a spread spectrum communication system. By the invention, the anti-interference performance of the spread spectrum communication is effectively improved, an output signal to interference ratio is improved, and practicability and flexibility are relatively high.

The invention discloses the field of unmanned aerial vehicles and provides an unmanned aerial vehicle device ascending and descending smoothly and a control method. The unmanned aerial vehicle device ascending and descending smoothly comprises multiple auxiliary propellers. The auxiliary propellers are symmetrically arranged on the periphery of an unmanned aerial vehicle body with a cross-shaped rack serving as the center. Rotary planes of the auxiliary propellers are perpendicular to the horizontal plane, and the directions of the rotary planes of the auxiliary propellers can be adjusted. By the adoption of the unmanned aerial vehicle device ascending and descending smoothly, the manner that the auxiliary propellers are additionally arranged is adopted, the problem that an unmanned aerial vehicle device deviates due to the interference from the horizontal plane direction is effectively solved, and the unmanned aerial vehicle device ascends and descends smoothly in the vertical direction; and meanwhile the ascending and descending time of the unmanned aerial vehicle device is shortened, the anti-interference ability of the unmanned aerial vehicle in the ascending and descending process in a severe environment is improved, and the problem that the unmanned aerial vehicle deviates and even crushes due to interference is effectively solved.

The invention discloses a method and system for cooperatively locating a heterogeneous network based on WLAN and a WSN. The method comprises the following steps that a WLAN and WSN mixed locating system for the heterogeneous network is built in a locating area; N sets of data closest to the sampling information of a node to be measured are selected through a WLAN locating technology; the position of the node to be measured is estimated based on a WSN locating technology; cooperative locating is carried out through the WLAN and the WSN, the data selected through the WLAN technology are compared with estimation coordinates in the WSN locating technology, and the set of closest position information is selected as the final estimation position of the node to be measured. According to the method and the system, the advantages that WSN networking is flexible and WLAN network transmission speed is high are effectively combined, all technical defects are avoided, through the existing WLAN, the existing WSN and the designed network fusion algorithm, locating precision is obviously improved, and meanwhile signal flying value points caused by a complex and changeable environment can be removed.

The invention provides a method for measuring a line parameter through induced electricity, which is characterized by comprising the following steps: (1) setting one end of a line into an open-line state, maintaining the other end to a ground state, selecting an internal power reference phase, and utilizing a voltage divider and a waveform measuring and recording device to measure a three-phase open-line induced voltage of a dead line in a common tower or parallel multi-circuit line on the premise of not applying a signal source outwards; (2) maintaining both ends of the line to the ground state, selecting the internal power reference phase, and utilizing a current transducer and the waveform measuring and recording device to measure a three-phase short-circuit induced current of the dead line; and (3) decomposing the induced voltage and the induced current by the processing of software and hardware such as filtering, nuclear phase, sequence component decomposition and the like to obtain zero-sequence and positive-sequence voltages and zero-sequence and positive-sequence currents so as to obtain zero-sequence impedance and positive-sequence impedance of the dead line. The method adopts a signal measuring and recording device to measure the induced voltage and the induced current on the dead line on the premise of not applying power outwards, and utilizes a component decomposition method to solve the line parameter so as to prevent the line parameter from being impacted by the induced electricity.

The invention relates to civil aviaton groud air communication self-adapting interference suppression method and its thesystem based on the single channel, including: translate the aerial wire received high frequency amplitude modulation signal into the medium frequency digital signal; and carries on medium frequency estimate after filter drawoff; carries on self-adapting trapped wave to trap the carrier wave in the amplitude modulation signal; thus carries on the orthogonal transform; taking the lasting model interference signal after the orthogonal transform; implement cancellation and carries on demodulation, again output the aural signal after filter the high frequency clutter. The invention considered the interference source characteristic of the civil aviaton groud air communication and the actual question, with the existing broadcasting station structure, does not increase the receiving antenna, does not use any reference signal, uses the self-adapting signal processing method can cancel the exterior permanent mold disturbance of serious influence broadcasting station receptivity, provided the anti-jamming ability of the civil aviaton groud air communication.Tend to maintain and to promote. Also may use in other amplitude-modulation receivers, enhances the receptivity.

The invention discloses a forming method of uneven high-precision laser additives. The method comprises the steps of forming additives by adopting an arc heat source; driving a laser displacement sensor to scan the surface profile of an additive forming piece, and calculating the surface accuracy of a workpiece according to the deviation of measured values of the sensor; inputting the accuracy into a modeled controller, and reconstructing a surface model of a part by the controller, so that the difference with the original surface accuracy is obtained, repair parameters of different areas in the surface of the part are determined, and control measures are sent; and inputting the repair parameters into a robot control cabinet, and applying laser heat sources with different energy and frequency to the different areas in the surface of the workpiece by the control cabinet according to the repair parameters. After repair, the laser displacement sensor is driven again so as to scan the surface profile, whether the repaired workpiece reaches the standard is determined, and if the repaired workpiece does not reach the standard, the workpiece is repaired again until the workpiece reaches the standard. According to the method, the surface accuracy of a laser additive member can be effectively increased, so that the quality of the laser additive forming piece is increased.

The invention relates to an H-bridge driving control circuit of a motor, which comprises an H-bridge driving circuit, a driving control unit, an anti-interference unit and a protection unit, wherein in the H-bridge driving unit, two diagonal branch circuits are formed by four switching tubes; the driving control unit is used for converting an input control signal into a suitable voltage for controlling to switch on the corresponding switching tube; the anti-interference unit is used for preventing the upper arm switching tube of the other branch circuit from being switched on when one branch circuit is in the switch-on state; and the protection unit is used for preventing the lower arm switching tube of the other branch circuit from being switched on when one branch circuit is in the switch-on state. The H-bridge driving control circuit of the invention prevents the P switching tube which cannot be switched on from being switched on due to starting of the motor or burr generated by transient large current, improves the anti-interference capacity of the circuit, and can rapidly switch off the corresponding N-channel switching tube when the circuit control signal is disordered or goes wrong, so that the circuit has through protection function. The whole driving control circuit is driven by a single power supply, is easy to implement and has a simple structure, and the reliable work of the circuit is further guaranteed.

The invented method includes the following steps: 1). Inputting the selected parameter into high-speed DSP to produce chaos series; 2). Using chaos series to make frequency modulation to obtain chaos radar signal; 3). Dividing chaos radar signal into two lines, one line is passed through modulation unit and transferred to transmitter and transmitted, another line is transferred to pulse compression unit and can be used as reference signal; and 4). Transferring base band signal after the received return signal is down converted to the pulse compression unit to make pulse compression, then outputting said signal for making analysis.

The integrated dynamic displacement measurement device for magnetic suspension rotor comprises a measurement circuit, which includes: an input port connected with an output port of sine-wave generator, a drive module with output port connected at least four or more radial displacement sensors and one axial sensor. Besides, it also includes a full-bridge rectification filter module, a signal modulation module, a sampling holder, a multiplex switch, an A/D converter, and a CPU. This invention has well performance with low cost.

The invention provides an online resistance type device and an online resistance type method for measuring water of grain. The online resistance type device comprises a grain dryer, a sampler and a measurement instrument. The invention further provides a method for measuring the water of the grain by using the online resistance type device. By using the method and the device, intelligent automatic operation of the grain dryer can be realized, the influence caused by temperature and impurities is eliminated, and the water of the grain is accurately measured.

Provided are a high-voltage interlock detection circuit and an automobile. The high-voltage interlock detection circuit includes a voltage dividing module coupled with a high-voltage interlock loop toform a detection loop, and a first signal generator to generate a positive voltage square wave current signal. A second signal generator for generating a negative voltage square wave current signal;A detection unit that detects a first signal component of a first frequency on the voltage dividing module and outputs a first detection level and a second detection level, and a second signal component of a second frequency on the voltage dividing module and outputs a third detection level and a fourth detection level; A control unit determines whether the high voltage interlock loop is abnormalbased on the detection level. The HVIL loop is driven by a square wave current signal. Because the loop is a single closed loop and there is no branch loop, the current signal will not change with thelength of the transmission line and there is no signal attenuation. Therefore, the HVIL loop has a longer transmission distance and can meet the general platform requirements of almost all types of vehicles for the length of the high voltage interlocking loop.

The invention discloses a brushless direct current motor electronic speed governor based on STM32, and the speed governor comprises an STM32 micro controller, a power driving circuit, a three-phase inverter circuit, a voltage and current monitoring circuit, a communication module circuit, a counter electromotive force detection circuit, an indicator circuit and the like; the STM32 micro controller drives the three-phase inverter circuit through the power driving circuit through an H-PWM-L-ON method, carries out connection and three-phase and six-state control on a motor, and synchronously detects a counter electromotive force zero-crossing signal among high-level intervals of pulse width modulation (PWM); the voltage of a three-phase end is converted through an analog-digital (AD) injection group method in the STM32 micro controller; the counter electromotive force zero-crossing signal is acquired by comparing corresponding end voltage and central point voltage in software; the AD injection group conversion is triggered by a TIM1_CC4 event; the power voltage, current and temperature detection is converted through a continuous circulating scanning method of an AD rule group and sent to the corresponding random-access memories (RAMs) through a direct memory access (DMA) channel; and compared with an the electronic speed governor which adopts a single-chip microcomputer, the brushless direct current motor electronic speed governor based on STM32 has the characteristics of higher anti-interference capability, small hardware space, higher performance and a plurality of communication methods.

The invention brings forward a multi-path frequency hopping-based single-channel blind source separation anti-interference communication system and a method thereof, thereby solving a technical problem of improvement of an anti-interference capability of a frequency hopping communication system in a complex electromagnetic environment. According to the invention, multi-path hopping carrier frequencies are utilized at a transmitting terminal of a frequency hopping communication system to carry out frequency hopping modulation on the same emission signal simultaneously; multi-path hopping carrier frequencies corresponding to the transmitting terminal are utilized at a receiving terminal to carry out dehopping on a received mixed signal respectively, thereby obtaining multi-path mixed signals; and a blind source separation algorithm is used to carry out signal and interference blind separation on the mixed signals and after signals are obtained, dehopping is carried out on the signals to obtain a source signal. When the system and the method are used, on the condition that the number of transmitting antennas and the number of receiving antennas of the traditional frequency hopping communication system are not increased, a single-channel blind source separation technology is used to carry out separation of a source signal from a signal, thereby substantially enhancing communication efficiency of the frequency hopping communication system and improving the anti-interference capability of the system in the complex electromagnetic environment.

The invention provides a binary channel communication remote meter reading monitoring and analysis system. The system is characterized by comprising a user meter, a collector, a concentrator and a master station. Data are exchanged between the user meter and the collector through a Europe instrument bus. Data are exchanged between the collector and the concentrator through an RS485 bus or a micropower wireless channel. Data are exchanged between the concentrator and the master station through a GPRS/GSM or TCP/IP network. The system has the advantages that the binary channel communication scheme enables signal transmission not to be limited and interfered by the landform, building blocking and other factors, the transmission speed is high, real-time performance is high, data are safe, and interference resistance is high; micropower wireless channels are independent from each other; various communication network models are formed through optimization and integration in a heterogeneous network mode, complementary advantages are obtained, and communication blind points are eliminated; direct reading intelligent meters are adopted in the whole system, and the data accuracy is 100%; each device has the storage function and the self-checking function.

The invention belongs to the technical field of heating regulation and control of buildings and particularly relates to a Zigbee-based central heating regulation and control system of a public building. The technical scheme disclosed by the invention is of the Zigbee-based central heating regulation and control system of the public building. The Zigbee-based central heating regulation and control system of the public building comprises a building calorimeter and a building heating valve, as well as a temperature collector, a building coordinator, a remote monitoring computer and a terminal mobile phone. The Zigbee-based central heating regulation and control system disclosed by the invention can improve the degree of satisfaction of users with different thermal requirements, the single-point temperature collection is accurate, the precision is high, heat users are guided to reasonably use heat from the heat user ends, and the energy utilization rate of the building is further improved. Simultaneously, a flexible temperature regulation way is provided, and the regulation and control demands of the different users can be better met; and the remote real-time monitoring based on Internet is realized, real-time inquiry, regulation and control through mobile phone short messages can be realized, and the use of each user can be facilitated.

The embodiment of the invention discloses an optical module and an optical signal receiving circuit. The optical signal receiving circuit comprises a receiver optical subassembly which is used for receiving burst uplink optical signals and converting the uplink optical signals into electric signals, wherein the uplink optical signals comprise a high-rate optical signal and a low-rate optical signal; a rate select switch of which electric signal input end is connected with the electric signal output end of the receiver optical subassembly, wherein the rate select switch is used for selecting a control signal according to a rate of a control unit and outputting the electric signals output by the rate select switch to a high-rate signal limit-amplitude amplifier or a low-rate signal limit-amplitude amplifier; the high-rate signal limit-amplitude amplifier of which input end is connected with the output end of the rate select switch; and the low-rate signal limit-amplitude amplifier of which input end is connected with the output end of the rate select switch. According to the technical scheme provided by the optical module and the circuit, the uplink receiving sensitivity for the XG-PON1 and XGS-PON double-rate optical signals is improved to a great extent.

The present invention discloses a multi-model transverse fuzzy control method based on vehicle speed partition. The multi-model transverse fuzzy control method comprises the steps of establishing a vehicle model to obtain a vehicle two-degree of freedom motion differential equation; establishing a road surface curvature model; establishing a preview error model; dividing the vehicle speeds into the low speed, the intermediate speed and the high speed, and designing the corresponding transverse fuzzy controllers respectively; in the design of the three transverse fuzzy controllers, all adopting a transverse distance error E1 and an angle error E2 which are generated during a path tracking process as the input, and outputting the appropriate front wheel rotation steering angles delta under the vehicle speeds and under different fuzzy control rules; returning the front wheel rotation steering angles delta outputted by the fuzzy controllers designed in the previous step to the step 1 as the input of a vehicle two-degree of freedom model, thereby forming a closed-loop feedback system. The different controllers are designed based on the speed partition, so that the multi-model transverse fuzzy control method based on the vehicle speed partition of the present invention enables the adaptation capabilities of the controllers under different vehicle speeds to be increased greatly.

The invention discloses a satellite ground micro-vibration test system. The satellite ground micro-vibration test system comprises a high-sensitivity sensor used for extracting vibration signals near a disturbance source or a load, an anti-aliasing filter used for performing anti-aliasing filtering on the vibration signals extracted by the high-sensitivity sensor to form piezoelectric signals, a high-modulus conversion rate acquirer used for generating the piezoelectric signals into digital signals and a high-precision controller used for controlling display, storage and analysis of the digital signals. According to the invention, the high-sensitivity sensor realizes small-magnitude acquisition of the vibration signals, digital signals are generated through a high-precision data acquisition card after the vibration signals are subjected to the anti-aliasing filtering, and subsequent process is performed to provide efficient input for the subsequent satellite vibration reduction or vibration isolation and environmental test and also realize verification of vibration reduction or vibration isolation performance. Therefore, the satellite ground micro-vibration test system, disclosed by the invention, has the advantages of satisfying demands on acquisition and analysis of micro-vibration signals and being of great importance in improving control precision and stability of a satellite platform.