713results about How to "High control precision" patented technology

A control method and a control device of an engine are introduced. During the process of the engine controlling, the control unit does the adaptive learning for the actual target value of the feedback of different aims, and following the dynamic spectrogram generation strategy optimizing compares the adaptively learning parameter of the same working status and the same time with the basic spectrogram parameter. If the compared result doesn't meet the condition, then keep the basic spectrogram parameter. And if it meets the condition, then the engine generates the dynamic spectrogram parameter. Based on the dynamic spectrogram combination strategy, the engine combines the basic spectrogram parameter and the dynamic spectrogram parameter generated to the combined spectrogram parameter instead of the basic spectrogram parameter.

The invention provides a GPS speed and position observation abnormal value detection method for an unmanned aerial vehicle (UAV). The GPS speed and position observation abnormal value detection method comprises the steps of obtaining a speed estimation value and a position estimation value which are obtained after the fusion of sensor data of an accelerometer and observation data of a GPS positioning device; setting up the time, then calculating the changing quantities of speed and position which are observed by the accelerometer, and recording the speed and position observation results of the GPS positioning device; obtaining the speed and position observation errors of the GPS positioning device; and setting up a first threshold and a second threshold, and determining whether the speed and position observation results of the GPS positioning device are abnormal. According to the embodiment of the invention, the method can be used for quickly detecting the variation value introduced by the GPS speed and position observation, accidents of UAV crash caused by GPS failure due to environmental interference are avoided, and the flight safety of the UAV is improved.

The invention discloses a flow AGC strip thickness control method of a reversing cold rolling mill, which comprises detecting steps of strip thickness and speed at the input and output of the rolling mill, detecting and computating steps of stiffness coefficient of the rolling mill and plasticity coefficient of strip, control steps of precontrolling AGC, monitoring AGC and hydraulic pressure APC in the control of the hydraulic pressure AGC. The invention is characterized in that the flow AGC strip thickness control method of a reversing cold rolling mill, comprises a establishing steps of a mathematical model of the flow AGC control, computating steps of strip theoretical thickness difference at the output of the rolling mill, computating steps of gap compensation regulation of the rolling mill; the cap regulation of delta Sh of the flow AGCregulated by a PI regulator ,is used as the thickness control of the rolling mill, that is, steps of thickness closed ring control of gap compensation of the endocyclic hydraulic pressure AGC of the hydraulic pressure AGC. The invention has real-time thickness compensation without a time delay and is suited to being widely popularized in AGC system of strip single stand reversing cold rolling mill.

The invention discloses an electronic expansion valve control method and device and an air-conditioning machine set. The electronic expansion valve control method comprises the following steps: detecting the exhaust temperature of a compressor; detecting the air sucking temperature of the compressor; detecting the temperature of a throttle point, wherein the temperature of the throttle point is the temperature of the throttle point after the electronic expansion valve is throttled; selecting a present control strategy from preset control strategies according to the exhaust temperature, the air sucking temperature and the temperature of the throttle point; controlling the opening degree of the electronic expansion valve according to the present control strategy. By adopting the electronic expansion valve control method and device and the air-conditioning machine set, the problem that in the prior art the control precision of the electronic expansion valve is low is solved, and the effect of improving the control precision of the electronic expansion valve is achieved.

The invention relates to a scratching and corrosive wear test device, in particular to a high-temperature high-pressure in-situ scratching and corrosive wear test device. The device solves the problems that in-situ single-time scratching, reciprocating multiple-time corrosive wear and the like are difficult to realize under the high-temperature and high-pressure environment in the prior art. The device is provided with a frequency converter, a motor, a high-pressure kettle, a control cabinet, a double-upright-post fixed bracket, a moving shaft, a scratching head and the like, can perform in-situ single-time scratching, reciprocating multiple-time corrosive wear research on the surface of a test sample at high temperature and high pressure, and can detect a signal, which represents the process of a test sample surface membrane changed from damage to passivation in the scratching or corrosive wear process, by cooperating a high-temperature high-pressure reference electrode and a high-temperature high-pressure working auxiliary electrode which are arranged on the high-pressure kettle, with an electrochemical working station.

The invention discloses a load-sensitive electro-hydraulic proportional multi-way valve and belongs to the technical field of multi-way valves. The load-sensitive electro-hydraulic proportional multi-way valve comprises a first tandem and a second tandem. The first tandem is composed of a safety valve (1), a first pilot electro-hydraulic proportional relief valve (2), a second pilot electro-hydraulic proportional relief valve (5), a first load-sensitive pressure compensation valve (3), a first hydraulic reversing master valve (4) and an overload makeup valve (14). The second tandem is composed of a third pilot electro-hydraulic proportional relief valve (6), a fourth pilot electro-hydraulic proportional relief valve (9), a second hydraulic reversing master valve (11), a floating valve (12) and an LS (load-sensitive) shuttle valve (13). The load-sensitive electro-hydraulic proportional multi-way valve is capable of simultaneously receiving single or multiple control command signals to respectively control output oil circuits of the multi-way valve and is easy for remote control and complex compound action of multiple actuators, energy resources are saved, and environment pollution is reduced.

The present invention discloses a method for the command line interface authorization grading. The procedure comprises that the authorization of the user operation command line interface equipment is divided into various grades; the command tree view opposite to the authority is provided to the user according to the various authorization grades. Correspondingly, the present invention also provides a command line interface authorization grading system. The present invention solves the problem that the authorization grade in the existing command line interface authorization management is not delicate and the configuration is not flexible, what you See is what you get, and the user operation is very convenient. At the same time, the present invention satisfies the security application requirement based on the command line configuration, prevents the unauthorized user to consult or change the equipment configuration information beyond the authorization scope, and guarantees the security and the normal running of the equipment.

The invention provides an advanced coordinated control system for moisture in a cut tobacco dryer. The system is characterized by comprising a head control system, a middle control system and a tail step control system, wherein the head control system adopts a multi-input single-output model; in the middle control system, the moisture is introduced into the control system and subjected to feedback correction, and during model predictive control, an error between the process actual output and the model output is adopted for feedback to overcome a defect; and the tail step control system establishes a model for the tail process. The advanced coordinated control system has the advantages that: 1, the control process is fully automatic; 2, the capacity of overcoming interference is high, and the control accuracy is high; 3, the system has an adaptive control function; 4, the dried cut tobacco amount at the head and tail is reduced to the greatest degree; 5, the oscillation in the regulating process is avoided; 6, the fragmentation of the cut tobacco in the production process is reduced; 7, jump and non-smoothness caused by piecewise fitting are avoided; and 8, a condition that the relative humidity in a cut tobacco drying cylinder is influenced due to ultrahigh or ultralow moisture exhaust is avoided.

The invention provides a temperature control system for a high-gloss plastic mould without melted marks; the system comprises a temperature controller, a heating boiler, a cooling tower, a water tank, an air compressor and a control unit; the temperature controller is provided with a steam pipeline, a cooled water pipeline, a compressed air pipeline, a mixer, a module inlet pipeline and a module outlet pipeline; the heating boiler, the cooling tower and the air compressor are all connected with the temperature controller by pipelines; the module inlet pipeline and the module outlet pipeline in the temperature controller are connected with a module, in which temperature sensors are arranged; each temperature controller and each control valve are connected with the control unit by communications cables. The invention can heat or cool plastic modules according to each phase of the injection cycle, thereby having high control precision of the module temperature and wide heating and cooling scope of modules; the system can be used for getting plastic products with high-gloss surfaces, good performance and low production cost, but without melted marks, flow marks, and spraying processing.

The invention provides a rotating speed control method and device of a brushless DC fan, the brushless DC fan and a refrigerator. The rotating speed control method of the brushless DC fan comprises the following steps: detecting the real-time rotating speed of the brushless DC fan; comparing the real-time rotating speed with a target rotating speed; adjusting the current duty ratio of the driving voltage of the brushless DC fan according to the comparison result, so as to adjust the real-time rotating speed to be matched with the target rotating speed. According to the technical scheme, the rotating speed control method of the brushless DC fan has the advantages that the duty ratio of the driving voltage of the fan can be accurately controlled, thus the output voltage of the fan can be accurately controlled, and as a result, the accurate control of the rotating sped of the fan is realized, and the noise of the refrigerator is minimized.

The invention belongs to the control technical field and provides a robot and a marching control method thereof so as to solve the problem of low robot marching control precision in the prior art. The method can calculate a target position coordinate of a target marching point of the robot in a global map coordinate system according to a current position coordinate of a preset first reference point on the robot in the global map coordinate system, a current marching direction of the robot in the global map coordinate system, a first distance between a second reference point, closest to the first reference point, on a wall body, and the first reference point, a second deflection angle between a connection line between the first reference point and the second reference point and the current marching direction, a second distance needing to be kept between the first reference point and the wall body as well as marching step length along the marching direction of the wall body. The method can greatly improve robot marching control precision by accurately calculating the target marching point of the robot.

The invention relates to a load-sensitive electric proportional multi-loop valve. The load-sensitive electric proportional multi-loop valve aims to enable all loops to work with different loads, save energy and reduce environmental pollution. According to the technical scheme, the load-sensitive electric proportional multi-loop valve comprises a main oil path, a raising loop, an inclined joint, an attachment joint, a logical direction valve, a two-way solenoid valve, a proportional electric overflow valve and a two-way hydraulic control reversing valve, the main oil path is communicated with two gear pumps P1, P2, the raising loop is connected to the main oil path through an electronic proportional pressure compensation flow control valve, the inclined joint and the attachment joint are connected to the main oil path through an electronic proportional pressure compensation flow control valve, the logical direction valve is connected to the main oil path, the two-way solenoid valve and the proportional electric overflow valve are connected to an oil inlet of the logical direction valve, and the two-way hydraulic control reversing valve is used for controlling whether the gear pump P2 supplies oil to the main oil path or not. The load-sensitive electric proportional multi-loop valve is applied to the technical field of hydraulic system control valves of 5-10t forklifts.

Mutual interference between a hydraulic pressure of a first engagement device and a hydraulic pressure of a second engagement device is suppressed even in the case where operation of the first engagement device and operation of the second engagement device coincide with each other. A vehicle drive device includes a first engagement device that selectively couples a rotary electric machine to an internal combustion engine, and a fluid coupling. The first engagement device includes a first oil chamber that is formed to apply a back pressure to a first piston. The fluid coupling includes a second oil chamber configured to control an engagement state of a second engagement device. The vehicle drive device includes a first control valve that controls a first oil chamber hydraulic pressure, and a second control valve that controls a second oil chamber hydraulic pressure independently of the first oil chamber hydraulic pressure.

A motor control method with high dynamic response speed and high control precision features that the current loop control instead of speed loop control is used, in which the optimized PI control method is used, the depth of throttle is directly relative to the current iq for dynamically detecting the current value, and the difference between the target current and actual current is used as the input of current loop.

The invention relates to a driven-by-wire brake system for an electric automobile. The driven-by-wire brake system comprises a motor, a planetary gear train, a thread lead screw pair, a main cylinder, a brake mechanism, a pedal execution and simulation mechanism, an energy accumulator, an oil pot and a controller. The motor, a speed reduction and torque increase mechanism and the thread lead screw pair are used for replacing a vacuum booster of a traditional vacuum servo hydraulic braking system, a piston in the brake main cylinder is pushed to move to generate brake hydraulic pressure, and therefore dependence on the vacuum degree of an engine is eliminated. The high-pressure energy accumulator is arranged, driving pressure compensation is provided for the system in the initial brake process of the motor, the response time of a traditional automobile brake system can be achieved easily, the control precision of the system is improved, and the requirements of the system for the rotating speed and power of the drive motor can be effectively reduced by being matched with the speed reduction function of the planetary gear train. The high-pressure energy accumulator can provide braking two to three times when the system breaks down and is overall powered off, meanwhile, pedal force provided by people can act on braking at the moment at the same time, and therefore the brake safety of the system is improved.

The invention relates to an automatic switching control method for decentralization and centralization of mobile manipulators. The method includes: firstly, establishing a world coordinate system and a vehicle-mounted coordinate system for the mobile manipulators, and acquiring current poses of the mobile manipulators; secondly, aiming at different control strategies, establishing kinematic and dynamical models for a system; and thirdly designing an automatic decentralization and centralization control switcher, and finally completing established tasks by means of coordination control of the mobile manipulators and a movable platform. Aiming at different control tasks, a reasonable control scheme is selected as either decentralization or centralization, the tasks are guaranteed to be completed smoothly under coordination control between the movable platform and the manipulators, and further control performance of the mobile manipulators is improved under the influences of uncertain factors such as unknown external disturbance, environment time varying and obstacle avoidance. The method can be widely used for application fields of industrial production, medical assistance and the like, and researches on different objects of underwater robots, flying robots and the like can be extended.

The present invention provides a digital waveform adjustment method for quantum bit control, and belongs to the quantum system field. The quantum bit control is composed of a series of control pulses. The digital waveform adjustment method comprises generating the control pulses by a waveform generator; decomposing the control pulses into different pulse function relationships; preprocessing the decomposed pulse functions; and composing the preprocessed pulse function relationships and using the waveform generator to generate the control pulses, and performing the quantum bit control. According to the digital waveform adjustment method for the quantum bit control, operating errors caused by factors such as crosstalk, waveform distortion and noise during the quantum bit control can be prevented, and therefore quantum bit control precision can be improved.

The invention discloses a temperature control fenestrated membrane and a making method thereof. The temperature control fenestrated membrane comprises a spectrum-selective membrane, doped membranes and a flexible basal membrane, wherein the doped membranes are arranged on the two side surfaces of the spectrum-selective membrane; the flexible basal membrane is arranged on the VO2 doped membrane on one side of the spectrum-selective membrane. According to the temperature control fenestrated membrane and the making method thereof, the VO2 membranes are formed on the two side surfaces of the spectrum-selective membrane, the property that the VO2 membranes in the metallographic phase under high temperature reflect infrared rays while in the semiconductor phase under low temperature enable the infrared rays to penetrate through is utilized, and through the doping technology, the phase-transition temperature of the VO2 doped membranes is reduced to room temperature, so that the purpose of automatically regulating the infrared transmission according to the indoor temperatures is achieved, and the control precision of the intelligent fenestrated membrane on the transmittance of the infrared rays is further improved.

The invention relates to the technical field of air conditioner control, in particular to an electronic expansion valve control method and device in a heat pump air conditioning system. The method comprises the following steps: acquiring pressure at the suction end of an electric compressor and temperature at an outlet of a vehicle interior heat exchanger; calculating an actual superheat degree through the pressure at the suction end of the electric compressor and the temperature at the outlet of the vehicle interior heat exchanger; acquiring a heating or refrigeration state sent by a panel of an air conditioner, and setting a target superheat degree according to the heating or refrigeration state; differencing the actual superheat degree and the target superheat degree to obtain a superheat degree deviation; and determining a current opening degree of an electronic expansion valve according to the superheat degree deviation, and sending the opening degree of the electronic expansion valve to the electronic expansion valve to control work of the electronic expansion valve. Through the electronic expansion valve control method and device, the control accuracy and the stability of the heat pump air conditioning system are improved.

The invention provides a hollow deflection-crossing type six-freedom-degree spray painting robot which comprises a hollow machine base, a hollow machine base gearbox, a hollow big arm, a hollow small arm and a wrist of a hollow deflection-crossing structure. The machine base, the big arm, the small arm and the wrist are each of a hollow structure, so pipelines are not exposed. Adopted servo motors are concentrated in position and beneficial to explosion prevention, the working space is large, control precision is high, loads are large, the pipelines can be completely built in, and the environment adaptability is high; by replacing a tail end executor, the robot can be quite conveniently used for other purposes, and cost is reduced for users.

The invention discloses a range extender control system and method. In the control system, an output end of a generated power demand module is connected to an input end of a state management module and an input end of an engine input power demand module. An output end of the state management module is connected with an input end of an engine control module and an input end of a power generator control module. An output end of an engine output power demand module is connected to the input end of the engine control module and the input end of the power generator control module. An output end ofa range extender working mode selecting module is connected to the input end of the engine control module and the input end of the power generator control module. Power generation requirements of different forms can be received and responded to according to the requirements of a vehicle system, and meanwhile the application occasions of an electric vehicle range extender are enlarged by flexibly adding and deleting sub-modules in a vehicle energy request queue.

The invention relates to an LCL type three-phase grid-connected inverter control method. The method includes first obtaining a preliminary PWM modulation signal by a traditional active damping controlmethod, then estimating the current after the resonance peak is suppressed according to the feature that an L-type filter and an LCL filter are consistent in characteristic at the low and medium frequency, obtaining the difference between the current and the actual current to be corrected by a current observer at the low and medium frequency, meanwhile feeding the higher harmonic part of the error current back to a control loop and introducing a network voltage feed forward item to obtain a final modulation signal and further control the access current of a grid-connected inverter. The accesscurrent is controlled in a two-phase rotating coordinate system, and the shortcoming that PI control cannot track an AC signal without static difference is overcome. On the basis of taking into account the advantages of active damping, the access harmonic components are further attenuated, and the grid-connected current quality and the system rapid response capability are improved. The method hasthe advantages of high control precision, high reaction speed and high reliability and is suitable for new energy integration grid-connected power generation systems.

The invention discloses a control method and device of an electronic expansion valve and an air conditioner. The method includes the steps of starting a compressor of the air conditioner; controlling the opening degree of the electromagnetic valve of the air conditioner to the first opening degree value, and starting timekeeping; detecting the first running parameter and the first running condition of the compressor, wherein the first running parameter is the running parameter of the compressor when the time obtained through timekeeping is between the first preset time and the second preset time, and the first running condition is the running condition of the compressor when the time obtained through timekeeping is between the first preset time and the second preset time; calculating the second opening degree value according to the first running parameter and the first running condition; controlling the opening degree of the electronic control valve to the second opening degree value. By means of the control method and device of the electronic expansion valve and the air conditioner, the problem that in the prior art, due to the fact that the control accuracy of the electronic expansion valve is low, the speed at which the compressor in an air conditioner system arrives at the stable running state after being started is low is solved.

The related high-precise single-axis magnetic levitation turntable comprises: a moment motor, a lower protective bearing, a lower/upper radial/axial integrated displacement sensor, a lower/upper radial magnetic levitation, an angular position coder, and a work platform. Wherein, it uses radial/axial magnetic levitation bearing to realize non-mechanical contact stable suspension between stator and rotator. This invention reduces friction moment and total volume greatly, and improves control precision and system security.

The invention provides a high-voltage pulse generator which comprises three parts such as a power supply cabinet, an operation board and a simulation lightning wave generator, wherein the power supply cabinet is used for controlling the operation of the generator and generating high-voltage pulse; the operation board is used for displaying and inputting a control instruction; the output end of an intelligent thyristor voltage regulating module is sequentially connected with a rectifier filter circuit, an H-bridge module and an LC (Liquid Crystal) resonance circuit; the LC resonance circuit is sequentially and electrically connected with a high-frequency and high-voltage charging transformer, a multiplier and an impulse voltage generator; and the impulse voltage generator is externally connected with an insulated testing system and is respectively and electrically connected with an external oscilloscope through a resistance voltage divider I as well as is electrically connected with an analog quantity input end of a programmable logic controller (PLC) in the cabinet through a resistance voltage divider II. According to the high-voltage pulse generator provided by the invention, the wave-front time can be regulated by regulating and converting a plurality of parameters in a grading way and the single triggering or automatic continuous triggering once each minute is realized; and the high-voltage pulse generator has the advantages of simpleness for operation, high control precision, safety and reliability.

The invention discloses a micro data line physical foaming production device. The micro data line physical foaming production device comprises a conductor power pay-off mechanism (01), a conductor pre-heater (04), a high-pressure nitrogen injection system (05), a foaming extrusion main machine (00), a movable temperature control water trough (10), a fixed cold water trough (11), a high-speed double-wheel traction machine (12), a blowing water absorber (14), a concentricity detector (15), a concavity-convexity detector (16), an eccentricity detector (17), a buffer tension bracket (18), a high-frequency spark machine (19) and an automatic reel-changing take-up machine (20) which are connected in sequence. All parts of the whole device are controlled by an electrical control box (09). The micro data line physical foaming production device is small in line resistance, high in control accuracy and capable of meeting the strict performance requirement for lines. The foaming degree of produced cables is very high and stable, and the micro data line physical foaming production device is especially suitable for cable products made from a foaming insulation material polyethylene (PE) and using nitrogen (N2) a foaming medium.

The invention relates to a tungsten argon welding electric arc length automatic control method in the field of an electric arc length automatic control method of tungsten argon welding. The main points of technical project is as follows: it uses self-adaptive electric inductance control technique, pulsed orthopedic technique, digital filter technique and PWM control technique; AD samples the arc voltage signal of welding machine's two lead-out terminals after signal processing circuit, and outputs the result to single-chip machine; the DA signal output of single-chip machine is connected with PWM to generate circuit; the circuit is connected with step motor which is then connected with step motor. It adopts eight general industrial single-chip machine, outer hardware circuit and PWM control technique to compute the bias of arc length and adjust arc length according to the change of arc voltage.

The invention relates to a leg structure of a wheel-foot integrated robot, which comprises a yaw mechanism, a thigh, a lower leg and a foot end of the robot. The whole leg has three sets of identicalhydraulic cylinders controlled by servo valves, the leg swing can be realized, the forward and backward movement of the thighs and calves, The direction of the wheels can be adjusted arbitrarily, andthere is a separate power source at the foot of the robot. A stepping drive machine is used to integrate the driving and control. According to the feedback of the motor motion parameters and real-timestate, the control parameters are adjusted at any time to make the motor reach the preset torque or speed. When traveling on a flat section of the road, the foot motor can be used alone to drive thewheels to rotate, so as to make the movement faster and save energy; When a user moves on a bumpy stretch of road, hydraulic actuators can be used to help the robot get over obstacles.

The invention is a vertical bilateral diffusion field-effect transistor (FET) compatible routine FET making method, a BCD process method for making high voltage integrated circuits, adopting silicon slice to make VDMOS, making high concentration P+1 injection in the periphery of a chip and extending junction depth; making PWELL1 injection in low voltage region, making NWELL injection in low voltage region, preoxidizing grid of the whole chip, injecting P impurity into the whole slice and oxidizing, etching thick oxide layer, then oxidizing the whole slice, depositing, doping and etching on the whole polycrystalline silicon slice, after etching, retaining voltage dividing field plate, making PWELL2 B injection in VDMOS region, and extending junction depth; making N+ As injection in a region used to make VDMOS source, and NMOS source/drain and PMOS substrate bias of CMOS, substrate bias of PMOS, and making B injction 'P+2' in the positions of PMOS source/drain and NMOS substrate bias of CMOS, making contact hole etching, evaporating aluminum on the whole chip, corroding aluminum to form meal leads, and etching pressure point.

The invention discloses a cemented carbide dewaxing and sintering integrated process, which comprises the following steps: firstly, argon is filled in a furnace, then the argon is replaced by hydrogen, and the pressure in the furnace is controlled with 1.01X10<5> to 1.03X10<5> Pa; the multistep heat rising and preservation is performed on the condition that the hydrogen flow is 240 L/min to 260 L/min, and paraffin forming agent is eliminated; the atmosphere in the furnace is adjusted as a negative pressure during the heat preservation period after the temperature is increased to 450 DEG C, and the residual paraffin forming agent in the furnace is eliminated through adopting the hydrogen pulse pressure to scour; after the paraffin forming agent is eliminated, the temperature is increased to 1300 DEG C to 1350 DEG C to perform the vacuum sintering; the argon is filled in the late period of the vacuum sintering, and the argon protection sintering is performed at the temperature of 1350 DEG C to 1450 DEG C; after the argon protection sintering is completed, the argon is rapidly cooled. The process has the advantages that the multistep heat rising and preservation is performed on the condition of a micro-positive pressure hydrogen atmosphere, the dewaxing efficiency is high, the product has no peeling, the product carbon content control precision is very high, and the alloy cobalt magnetism value reaches 6.8 percent to 7.2 percent after the hold up hammer sintering.