511results about How to "Offset the impact" patented technology

The invention, which belongs to the robot system control field, relates to a distributed adaptive-neural-network continuous tracking control method of a multi-robot system. According to the existing coordinated tracking and controlling method of the multi-robot system, problems of parameter uncertainty and external interference existence in the multi-robot system exist. The provided method comprises: under the circumstances that only parts of followers can obtain dynamic navigator state information, a distributed observer design is implemented with limitation of communication tine delay existence, so that all followers can obtain the dynamic navigator state information; and with consideration of the parameter uncertainty and external interference existence in the system, controlling is carried out by using a distributed adaptive tracking control expression designed based on two neural networks, so that the approximate error is close to zero. In addition, the control algorithm of the distributed adaptive tracking control expression is in a continuous control mode, no buffet is caused at the system and the great practical application value is created. Besides, validity of the control algorithm is verified by the simulation experiment.

The invention provides a pixel driving circuit and a driving method thereof as well as a display device. The pixel driving circuit comprises a driving transistor, first to fourth switching tubes and a storage capacitor. The driving method comprises the following steps: charging the storage capacitor; discharging the storage capacitor in order to generate a voltage difference between the voltages at the two ends of the storage capacitor; changing the data voltage in order to generate the same changes of the voltages at the two ends of the storage capacitor as the data voltage; driving an organic light-emitting diode to emit light. By adopting the driving circuit and the driving method, compensation of the threshold voltage of driving voltage for driving a transistor is realized, the influence of the threshold voltage on the working current of the organic light-emitting diode is counteracted, the problem of non-uniform brightness of pixel points due to inconsistent threshold voltage for driving the transistor at different pixel points is solved completely, and the picture display effect of the display device is improved.

The invention relates to a WIFI (Wireless Fidelity) positioning method and a positioning system thereof. The WIFI positioning method comprises the following steps of: arranging a WIFI positioning system comprising an access point, a dynamic label, a mobile unit, a center server and a database; generating each AP (access point) signal radio map of a reference system, and storing a database (DB); generating a newly-added TAG signal radio map of the reference system, and storing into the database (DB); on a mobile unit (MU), sampling each reference point signal SS of the reference system; according to the historical data of a sampling signal, carrying out iteration smooth filtering; on a center server LOC (Lines of Communication), obtaining the signal radio map of each reference system of the collected signal; according to an optimal algorithm, obtaining the geometric position of the sampling point; on the mobile unit (MU), finishing Kalman filtering to a moving object; and at the idle time of the center server LOC, finishing evaluating and updating the TAG position. According to the WIFI positioning method, the positioning precision of the whole positioning system can be improved so as to consider the data transmission efficiency and reliable positioning. The WIFI positioning method can be widely applied to the wireless positioning field.

The invention relates to a mobile terminal uplink channel local oscillation frequency regulation method, includes completing regulation of downlink channel local frequency fr by mobile terminal; setting local oscillation frequency control parameter of uplink channel according to the requirement of regulating ft to 2f0-fr, during regulation of local oscillation frequency ft of uplink channel by mobile terminal; wherein f0 is the carrier frequency when signal sent by the base station in the current work channel is not biased. Correspondingly, the invention provides a mobile terminal including alocal oscillation circuit and a frequency reference source thereof, a storage module, a downlink regulation module, a searching module, and an uplink regulation module. The mobile terminal is capableof regulating the carrier frequency on the receiving and transmitting channel respectively according to the moving state, effect of Doppler frequency shift is counteracted, multi-access interference between users can be reduced. Effect to communication system in OFDM multi-access mode is especially outstanding.

The invention discloses a near-space aircraft control system, which belongs to the technical field of aviation aerospace propulsion control. The near-space aircraft control system aims at the attitudestable tracking control problem of a near-space aircraft, and considers the problems of unknown interference and parameter uncertainty. According to the near-space aircraft control system, firstly, an estimated value of an interference observer for interfering the outside world, then the parameter uncertainty of the aircraft is analyzed, and a self-adaptive estimated value of the aircraft parameters is obtained; secondly, an integral sliding mode surface is selected thus a self-adaptive integral sliding mode controller is designed for tracking control of an inner ring attitude angle of the near-space aircraft; and finally, the stability of the controller is proofed by utilizing a Lyapunov stability theory. The near-space aircraft control system can ensure the global stability of a closed-loop system, and enable the system to have good tracking performance and robust performance.

The invention provides a duty ratio adjusting circuit which is used for adjusting the duty ratio of a first clock signal to acquire a third clock signal. The duty ratio adjusting circuit comprises a pulse width adjusting unit, a shaping unit, an inverse phase unit and a control signal generating unit, wherein the pulse width adjusting unit inputs a second clock signal and outputs the third clock signal; the inverse phase unit inputs the third clock signal and outputs a fourth clock signal; the third clock signal and the fourth clock signal have opposite phase position; and the control signal generating unit inputs the third clock signal and the fourth clock signal and outputs a control signal. The duty ratio adjusting circuit is simple in structure and can stably output the clock signal with the expected duty ratio.

The invention discloses a universal, all-terrain and automatic guiding type carrying robot. The universal, all-terrain and automatic guiding type carrying robot comprises a frame, a trolley bottom plate, four mecanum wheels, and motors for driving the mecanum wheels, wherein the frame fits the bottom plate; a damping mechanism is arranged at a position corresponding to each motor, and each damping mechanism comprises a spring pressing plate, a guide column, a first-stage damping spring and a second-stage damping spring; the spring pressing plates are fixed above the trolley bottom plate; the first-stage damping springs pass through passing holes in the trolley bottom plate, and two ends of the first-stage damping springs are correspondingly propped to the corresponding spring pressing plates and the corresponding motors; the bottom parts of the guide columns are fixed to the corresponding motors, and the top ends of the guide columns extend out from the corresponding spring pressing plates and are provided with spring fixing mechanisms; the second-stage damping springs are arranged between the spring fixing mechanisms and the upper surfaces of the corresponding spring pressing plates. According to the universal, all-terrain and automatic guiding type carrying robot, the first-stage damping springs can be used for performing primary damping on a trolley body, so as to meet the damping under different ground conditions; and the second-stage damping springs can overcome the bump and influence caused by sympathetic vibration.

The invention discloses a super magnetostrictive actuator driving single-stage direct-acting jet pipe servo valve, and belongs to the technical field of hydraulic servo control. The servo valve comprises a valve body (16), a flow distributor (8), a pair of electro-mechanical converters, and a pair of micrometric displacement amplifiers positioned between the electro-mechanical converters and the flow distributor (8), wherein each electro-mechanical converter comprises a thermal compensation hood (5), a super magnetostrictive rod (10) mounted in the thermal compensation hood, and a coil frame (2) positioned outside the thermal compensation hood (5), and also comprises a drive coil (4) and a bias coil (3) which are orderly wound outside the coil frame (2); each micrometric displacement amplifier comprises a cylinder, a big piston (9) arranged at one end of the cylinder and connected with the corresponding super magnetostrictive rod (10); and the other end of the cylinder is connected with the flow distributor (8). The jet pipe servo valve has obvious characteristics of quick response, big driving power and control flow, and the like.

The invention belongs to the technical field of electronics and relates to the frequency compensation technology of operational amplifiers in analog integrated circuits. The split compensation two-stage operational amplifier comprises a two-stage operational amplifier. A first-stage operational amplifier is composed of N-channel metal oxide semiconductor (NMOS) tubes (M1N, M2N, M3 and M4) and P-channel metal oxide semiconductor (PMOS) tubes (M1P, M2P and M0). A second-stage operational amplifier is composed of a PMOS tube M5P and an NMOS tube M5N. A traditional Miller capacitor is divided into a Cm1 portion and a Cm2 portion to finish frequency compensation of the operational amplifier. A first frequency compensation capacitor Cm1 is connected with the position between the output end of the first operational amplifier and the output end of the whole two-stage operational amplifier. A second frequency compensation capacitor Cm2 is connected with the position between a connection point of a source of the NMOS tube M2N and a drain of the NMOS tube M4 in the first-stage operational amplifier and the output end of the whole two-stage operational amplifier. The split compensation two-stage operational amplifier has strong robustness and higher unit grain bandwidth and output slew rate due to the fact that non-dominant poles and stray parameter are not related.

A read clock circuit for a disk drive includes a phase-locked loop / voltage controlled oscillator (VFO / PLL) and a frequency synthesizer. The VFO / PLL receives a servo sector transition signal that is related to detected transitions in a servo sector field of a magnetic recording disk, and outputs a servo frequency signal that is synchronous to the servo sector transition signal. The frequency synthesizer receives the servo frequency signal and generates the read clock signal that is synchronous with the servo frequency signal. In a banded recording disk drive the frequency synthesizer generates a unique read clock signal for each data band.

The invention discloses an intelligent nonlinear control system for a hypersonic morphing aircraft and belongs to the aviation aerospace propulsion control technical field. According to the intelligent nonlinear control system of the invention, according to problems in outer-loop stable tracking control of the hypersonic morphing aircraft, with influence on modeling caused by a morphing structure and influence on tracking control performance caused by model parameter uncertainty and external unknown interference considered, the control system is divided into three sub systems according to the state variable characteristics of the aircraft; control signals are obtained sequentially through using a backstepping method; approximation is performed on the unknown interference through adopting an RBF neural network, so that the robustness of the controller can be ensured; and according to the problems of difficulty in the derivation of virtual control signals and differential expansion, dynamic surface control thinking is introduced to make improvement. With the above technical schemes of the invention adopted, the global stability of the closed-loop system can be guaranteed, and the system has high tracking performance and robust performance.

The invention provides a method for debugging the driving waveform of a three-color electronic paper module, and the method herein has the characteristics of excellent universality, and excellent comparison and display effects. The method is characterized in that the method includes the following steps: 1. determining master driving frames: driving the three-color electronic paper module by usingblack / white / red picture standard test waveforms, and separately reading the black, white and red optical values of a test picture under three kinds of standard test waveforms by using an optical tester, separately comparing the black, white and red optical values with a standard black L*value, a standard white L* value, and a standard red L* value and a* value, obtaining a standard test waveform that meets optical requirements and obtaining a black / white / red master driving frame of the three-color electronic paper module; 2. determining DC balance frames: separately based on the black master driving frame, the white master driving frame and the red master driving frame, determining the DC balance frames corresponding to the black master driving frame, the white master driving frame and thered master driving frame; and 3. determining driving waveforms which include the DC balance frames that perform first driving and the black master driving frame, the white master driving frame and the red master driving frame that perform follow-up driving.

The invention relates to a nonlinearity-magnetization-based coil system of a magnetic particle content detection device. The coil system comprises two exciting coils (1 and 2) and a detection coil, wherein direct current and alternating current are respectively introduced into the two exciting coils (1 and 2) which are arranged coaxially inside and outside, the detection coil comprises three sections of solenoid coils which are arranged coaxially up and down in series, two sections of solenoid coils which are arranged on the outer side up and down are wound in the same direction, and the winding direction of the two sections of the solenoid coils is opposite to that of the middle section of solenoid coil. When the coil system is not used for detecting samples, preset current introduced into the exciting coils, and the voltage at two ends of the detection coil is zero. The coil system can be used by the detection device alone, and also can be used by a sensor detecting the content of magnetic particles so as to be integrated into multifunctional detecting and analyzing system. The coil system is mainly used in fields of immunoassay, nanotechnology, environment monitoring and the like.

The invention discloses a back-stepping robust self-adaptive dynamic surface-based near-space aircraft control system. The system comprises the steps of: initially employing interpolation fitting to obtain an aerodynamic parameter of an aircraft cruising segment, and building a longitudinal uncertainty strict feedback block non-linear model of an aircraft; secondly, separately controlling speed and height according to state variable characteristic of the aircraft, sequentially solving a control signal by a back-stepping method, approaching unknown interference by employing a RBF neural network, and updating the parameter on line and in real time; and finally, adding a dynamic surface control method with regard to the problems of virtual control signal derivation difficulty and differentialexpansion. By the system, the problems of virtual control signal derivation difficulty and differential expansion are solved, and the system has favorable tracking property and robustness.

The invention discloses a multifunctional intelligent household router, and relates to the technical field of routers. The router comprises a router body, the inner walls of the bottom and top ends ofthe router body are fixedly connected with rolling bearings respectively, the inner walls of the two rolling bearings are fixedly connected with a rotating rod, the wall of the rotating rod fixedly sleeves a T-shaped support block, and the sidewall of the T-shaped support block is fixedly connected with a first motor. The multifunctional intelligent household router is high in radiating efficiency, electronic components in the router can be avoided from damage caused by high temperature, it is ensured that the router works normally, the stability of WiFi signals of the router is ensured, theservice life of the router is improved, dust is avoided from entering the router, heat radiation and using safety of the router are ensured, it is not needed to clean the internal of the router manually, the labor intensity of workers is reduced, a network cable joint is avoided from wearing, and normal work of the router is ensured.

The invention discloses a near space variable wing aircraft adaptive winglet switching control system and a working method thereof, and belongs to the technical field of aviation aerospace propulsion control. For the problem of stable tracking control of speed and attitude of a near space variable wing aircraft and with the influence of a variable wing structure on modeling and the problem of switching control in the winglet telescoping process being considered, the method is characterized by obtaining a state equation expression based on a nonlinear model of an aircraft; and according to relative order of velocity and pitch angle, establishing reference models of an adaptive control system. A designed adaptive controller comprises a nominal controller and an adaptive update module, wherein the adaptive update module is used for automatically updating controller parameters to realize smooth transition before and after winglet switching. The system and method can ensure global stability of a closed-loop system, and the system is allowed to have good tracking performance and robust performance.

The invention relates to a permanent magnet linear synchronous motor system with low thrust fluctuation and a parameter design method of the system, and belongs to the technical field of permanent magnet linear synchronous motors. The system is composed of a permanent magnet linear synchronous motor primary part, a permanent magnet linear synchronous motor secondary part, a compensation block and a primary platform, wherein the compensation block is composed of a multi-tooth iron core; the number of teeth can be determined by polar distance of a permanent magnet linear synchronous motor; the tooth length and an air gap can be determined according to the amplitude of detent force of the permanent magnet linear synchronous motor; the distance between the compensation block and a primary iron core of the permanent magnet linear synchronous motor is determined by phase of detent force of the permanent magnet linear synchronous motor; and the compensation block and the primary part are mounted on the primary platform. According to the amplitude and the phase of the detent force of the permanent magnet linear synchronous motor primary part, the compensation block is designed, the amplitude of the detent force of the compensation block and that of the primary part are equal, the phase difference is Pi, and the resultant force of detent force of both is 0, as a result, the purpose of detent force compensation is realized.

The invention discloses a multi-section ventilation drag reduction method and device applied for a high-speed water surface boat. The device includes a disc cavitator, a pillar structure, a ring-shaped cavitator, a diving body, an air guiding tile, an air inlet groove, and an air exhausting hole, wherein an axis of the disc cavitator is downward inclined, the ring-shaped cavitator is arranged behind the front edge of the pillar structure, the pillar structure is arranged in the middle section of the diving body, a ventilation device is arranged behind the ring-shaped cavitator, and an includedangle between the incident flow surface of the ring-shaped cavitator and the incoming flow direction is 45 degrees. According to the multi-section ventilation drag reduction method and device appliedfor the high-speed water surface boat, a certain attack angle is arranged on the axis of the head part ring-shaped cavitator, and influence of the partial gravity effect on a cavitation form can be offset; and a great deal of cavitator is adopted, interference of a pillar on the cavitation is avoided, and the effect of adverse factors such as gravity floating and instability of ventilation supercavitation on the cavitation is weakened.

The invention relates to a shaping device and method, and particularly relates to a bearing ring shaping device and method. The bearing ring shaping device and method aim at solving the problem that a molding pressing technology or a mold control deformation technology is difficult to realize in a quenching process of a bearing ring which is complicated in structure and changes greatly in wall thickness. The bearing ring shaping device comprises a main body frame, a lifting cross beam, two guide columns, two guide sleeves, two fixing cushion blocks, an instrument pedestal, a positioning table, a limited block, a jack and two adjustable vertical columns, wherein the two guide columns are vertically arranged in the main body frame side by side; the upper ends of the two guide columns are fixedly connected to the main body frame; and the lifting cross beam is horizontally arranged in the main body frame. The bearing ring shaping device and method belong to the field of bearing manufacturing.

The invention relates to the water treatment field and specifically relates to a water treatment method for purifying sewage by use of microorganisms. The water treatment method is characterized by comprising at least the steps of arranging at least one biochemical bed in a water area to be treated and arranging a frame with a through opening on the biochemical bed. The water treatment method has the advantages that excellent microbial slow release effect can be produced, the microbial diversity in the water area is greatly increased, the reproduction and growth environment for the microorganisms is greatly improved and the influence of activity decline of the microorganisms in winter is counteracted, and the addition volume ratio of the biochemical bed relative to the water area to be treated is greatly lower than that of a filler in a conventional biochemical process.

There is much concern about global warming of the Earth caused by increasing concentrations of greenhouse gases produced by human activities such as the burning of fossil fuels and deforestation. There is also concern water and air pollution that are a byproduct of human activities. The invention comprises a method and system that quantifies and provides feedback regarding an environmental impact of all planned or completed activities associated with an entire trip including the impact of transportation, hotel, restaurants, and recreational activities. It further allows the traveler to offset the negative environmental impact by paying a corresponding amount of money to an organization associated with improving the environment.

The invention relates to a light intensity detection circuit and method. The light intensity detection circuit comprises a light sensing module, a voltage detection module and a light intensity information acquisition module. One end of the light sensing module is connected with a reference voltage end, the light sensing module is used for generating current passing through the light sensing module under the stimulus of light irradiation and comprises more than two photovoltaic conversion assemblies which are connected in parallel, and the directions of the current generated by the photovoltaic conversion assemblies are not completely the same. The voltage detection module is connected with the other end of the lighting sensing module and used for detecting voltage at two ends of the light sensing module, and a mapping relation exists between the voltage and the light intensity information of the light irradiation. The light intensity information acquisition module is used for acquiring the light intensity information of the light irradiation according to the voltage. The light sensing module, the voltage detection module and the light intensity information acquisition module are integrated in a single integrated circuit. The light intensity detection circuit can accurately detect the light intensity information at the high temperature.

The invention relates to the medical instrument field for restoring human body aorta in cavity, especially a saccule conveyer. At present, the saccule applied to clinical can completely block the aorta blood flow when the saccule is complete expanded, so that the saccule near-end pressure can raise and the saccule far-end pressure can reduce. The blood flow can generate stronger impact force to the saccule, at this point, because the saccule and a tectorial membrane frame is attached tightly, the saccule may drag the tectorial membrane frame to move towards the far end, so the serious bad results are generated. The main object of the invention is to provide a saccule conveyer, when the saccule is complete expanded and is attached tightly with tectorial membrane frame, the blood flow can not be blocked completely, a pressure difference between the saccule near end and the saccule far end can not be over large, the impact force of the blood to the saccule can be reduced. The stronger axial supporting force of a sheath tube can counteract the impact force of the blood flow to the saccule far end, so that the saccule can not drag the tectorial membrane frame downwards.

The invention discloses a horizontal opposed engine. The horizontal opposed engine comprises four air cylinders arranged horizontally and oppositely, pistons arranged in the air cylinders, a connecting rod assembly and a gear transmission mechanism. The connecting rod assembly comprises a first connecting rod and a second connecting rod. The two ends of the first connecting rod are connected with the first piston and the second piston correspondingly, and the two ends of the second connecting rod are connected with the third piston and the fourth piston correspondingly. The gear transmission mechanism comprises a first ratchet wheel, a second ratchet wheel, a first gear, a second gear and a transmission gear. The first ratchet wheel and the first gear are arranged coaxially. The second ratchet wheel and the second gear are arranged coaxially, and the first ratchet wheel and the second ratchet wheel are same in direction. The transmission gear is arranged between the first gear and the second gear and engaged with the first gear and the second gear. The first connecting rod and the second connecting rod are provided with racks correspondingly. The racks on the connecting rods are engaged with the ratchet wheels. The transmission gear is connected with a power output shaft. Compared with traditional crank-connecting-rod structures, through the adopted connecting rod mechanism, the design requirements of the air cylinders is simplified, and the impact force of high-pressure gas on the pistons is offset to a certain degree.

The invention discloses an apparatus and method for isolating the temperature influence by using two surface acoustic wave resonators, and belongs to the design field of surface acoustic wave sensors. The device comprises two surface acoustic wave resonators. The two surface acoustic wave resonators are arranged on an object to be measured along a main strain direction thereof, and surface acoustic wave propagation directions of the two surface acoustic wave resonators are the same as the main strain direction of the object to be measured. Each surface acoustic wave resonator includes a piezoelectric substrate and an electrode disposed on the piezoelectric substrate. The device is characterized in that tangential directions of the piezoelectric substrate materials of the two surface acoustic wave resonators are different and the piezoelectric substrate of one of the surface acoustic wave resonators is provided with a thin film thereon that covers the electrode and enables the coverage temperature of the two surface acoustic wave resonators to be the same. The device offsets the influence of the temperature parameters on the surface acoustic wave devices by using the characteristics that the two devices have the same temperature parameters and different strain parameters, and ultimately achieves the measurement of the strain.

A fully parallel slot array antenna based on a single-layer substrate integrated waveguide relates to a waveguide slot antenna. A low substrate integrated waveguide layer and an upper metal grid layercontaining a periodic air cavity are provided; A substrate integrated waveguide layer and a metal grid layer are connected through a radiation slot, the substrate integrated waveguide layer integrates a feed network composed of cascaded T-shaped power dividers. The incident electromagnetic wave enters the substrate integrated waveguide layer from the antenna input and reaches each radiation slotthrough the feed network composed of cascaded T-shaped power dividers, passes through the air cavity in the metal grid layer and finally radiates to the outer space.

The invention discloses an automobile front anti-collision beam device, which comprises a beam, a strip-shaped arch plate, a buffer foam block, a shock absorbing mechanism, a fixing groove, a telescopic mechanism, an arched support frame, an electric control box, a control panel, and a limit groove and the storage battery, the top of the beam is connected to the buffer foam block through an arch support frame, the top of the buffer foam block is equipped with a strip arch plate, the corresponding two sides of the beam are provided with fixing grooves, and the fixing grooves A telescopic mechanism is installed in the interior of the crossbeam. Limiting grooves are provided on both sides of the bottom of the beam. A shock absorbing mechanism is installed inside the limit groove. An electric control box is installed on one side of the beam. A control panel is installed on one side of the box, and a storage battery is installed inside the electric control box. Composed of plates and limit springs, the anti-collision beam device is conducive to buffering and shock absorption.

The invention relates to an electronic control friction method and an electronic control friction device for a micro-nano textured surface, belonging to a micro-nano friction test method and a micro-nano friction test device. The friction method comprises the steps of: early preparation, constant-pressure loading, electronic control signal input and frictional force detection. The electronic control friction device comprises a conductive spherical point of a probe, and the conductive spherical point is bonded with one end of a cantilever of the probe; the other end of the probe is clamped on a probe rack; the probe rack can move vertically along with a guide rail; meanwhile, the probe rack, a microampere meter, an electrochemical workstation, a resistance and a sample are sequentially connected; the side of the sample provided with texture is contacted with the probe; and the electrochemical workstation is connected with a computer system by a data line, so that voltage signals can be input in the frictional force test process. The electronic control friction method and the electronic control friction device for the micro-nano textured surface have the advantages that the test is convenient, and the accuracy is high; when the micro-nano texture electronic control friction test device is used for testing the friction performance of the micro-nano textured surface, the operation is simple, and the device is easy to control; and the method and the device are wide in application scope, can be used for carrying out precision test on the friction performance of the textured surface of micron, submicron, nanometer and the like, and can be used for regulating and controlling the friction process.

The invention discloses a multiphase motor channel fault ride-through operation control method. With the multiphase motor channel fault ride-through operation control method adopted, when a certain orseveral channels fail, fault-tolerant on-line channel switching non-stop ride-through operation is realized; and during a process in which the channel fails or the failed channel is removed, the over-current protection of the inverter alternating-current side (motor winding side) of the remaining operating channels, the voltage stabilization control of the inverter direct-current bus-bar side ofthe remaining operating channels and inverter magnetic field compensation integrated coordination control are implemented. With the method adopted, fast, stable and safe fault-tolerant on-line channelswitching non-stop ride-through operation of a multiphase motor is realized. The method can be used for high-power electromechanical energy conversion occasions such as ship propulsion, track traction and wind power generation.