257results about How to "Fast control response" patented technology

A remote control apparatus uses wireless communication to control driving of a control object such as a vehicle. When the drive condition is changing, as when the vehicle is being steered to follow a curve in a travel route, while also the vehicle speed exceeds a specified threshold value, processing is executed for reducing a communication delay between the remote control apparatus and the control object, to thereby ensure sufficient speed of control response.

The invention discloses a tension roll control device for a plate and strip processing line and a tension control method, belonging to the field of tension control of tension rolls on the plate and strip processing line in the metallurgical industry. The tension roll control device comprises a tension roll group, an auxiliary roll frequency converter and a main roll frequency converter, and further comprises an auxiliary roll speed encoder, a main roll speed encoder, a load distributor, a tension regulator, a feedforward compensation unit and a tensiometer, wherein two ends of the load distributor are respectively connected with the auxiliary roll frequency converter and the main roll frequency converter; the auxiliary roll frequency converter comprises an auxiliary roll rotation speed control unit and an auxiliary roll torque control unit; and the main roll frequency converter comprises a main roll rotation speed control unit and a main roll torque control unit. The tension roll control device has the advantages of high control response speed and high control precision. A control method of the tension roll control device comprises the steps of: (1) main/slave load distribution for the tension rolls; (2) complex tension control of the tension rolls; and (C) dynamic compensation. The method has the advantages of small steady state error of a torque loop, short anti-disturbance recover time, constant rotation speed and good anti-disturbance performance.

The invention relates to a device for detecting the angular position and the speed of the switch magnetic resistance motor and method, comprising a rotary encoder and a signal processing circuit mounted in the motor and fixed on a support plate, wherein the rotary encoder is connected with the main axis of the motor. The rotary encoder collects and transfers the angular position signals of the rotator to the encoder signal pretreating unit of the signal processing circuit. The encoder signal pretreating unit converts the output signal of the encoder into the signal capable for being received by the microprocessor unit. The microprocessor unit processes the angular position signals and calculates the speed of the motor. The communication unit sends the angular position signals and speed signals by serial communication bus. The connection line of the said device with the outside is simple and the antijamming capability is strong. The device device for detecting the angular position and the speed of the switch magnetic resistance motor is suitable for long distance transmission with high resolution, easy operation, small error and no zero setting by manpower.

Disclosed is an output power control method for a fuel cell system of a vehicle belonging to fuel cell automobile research and development technology field. A vehicle controller can compute a target torque of a motor according to a driver's intentions (such as key signal, accelerator pedal signal, brake pedal signal, gearshift signal), compute the motor power demand according to the motor rotation speed, and obtain a target output power of the fuel cell system according to the motor power demand and work state signals of the cell; then the vehicle controller can obtain a target input voltage of a DC/DC transformer according to the relationship between the fuel cell output power and output voltage, and send the instruction to the DC/DC transformer. The DC/DC transformer can perform PI closed loop control according to the target input voltage and actual output current, so as to realize direct control on the output power of the fuel cell system. The invention has high control precision, high response speed.

The invention provides a system and a method for controlling a speedless sensor of a permanent-magnet synchronous motor. The system comprises a motor body unit, an inverter unit, an SVPWM (space vector pulse width modulation) unit, a first comparator, a second comparator, a first PI (proportion and integration) controller, a second PI controller, a first coordinate conversion unit, a second coordinate conversion unit, a third coordinate conversion unit and a sliding mode extended Kalman filter. A sliding mode variable structure control law is embedded in an extended Kalman filter state equation and an output equation, a digital extended Kalman filter is finally acquired through linearization and discretization, and state evaluation of reference stator current and rotator rotating speed omega r is acquired through expanded Kalman recursion; control on the speedless sensor of a permanent-magnet synchronous motor control system is realized, and real-time updating of the reference stator current under d-q coordinates is realized. By the system and the method, control on the speedless sensor of a permanent-magnet synchronous motor can be effectively realized, high-frequency chattering generated by independently applying a sliding mode variable structure for controlling is inhibited, and accurate measurement on the speed and the position of a rotor of the motor is realized.

The invention discloses a pressurized water reactor (PWR) nuclear power plant reactor core power model predictive control method based on a genetic algorithm. The method comprises the steps of establishing a mathematical state space model of a reactor core; linearizing the mathematical state space model of the reactor core; establishing a power predictive control model of the reactor core; and carrying out parameters setting for the power predictive control model based on a genetic algorithm. The invention combines operating parameters of the PWR core, sets the parameters in a controller by using an improved genetic algorithm, obtains a global optimal solution, and achieves self-adaptive adjustment of PWR nuclear power plant reactor core power control; also predicts a future deviation value by using the predictive model, determines a current optimal control strategy by rolling optimization, and enables minimum deviation between a future controlled variable and a value of expectation; and optimizes undetermined parameters in the reactor core power predictive control model by using the genetic algorithm, and obtains optimal values for the undetermined parameters.

The invention belongs to the technical field of automation engineering and relates to an electromagnetic driving two-degrees of freedom spherical robot wrist and a control method thereof. The electromagnetic driving two-degrees of freedom spherical robot wrist is a high-integration driving spherical wrist device, the two output ends of an internal universal joint and an external universal joint passing through the same rotating center are coaxially connected, and a radial magnetizing permanent magnet in a servo mechanism is directly driven by a coaxial servo magnetic moment in a space universal rotary magnetic field to realize side-sway and pitching two-degrees of freedom rotation. The electromagnetic driving two-degrees of freedom spherical robot wrist overcomes the defects of a complicated driving machinery wrist, the wrist driving system is simple and light in structure, high in transmission efficiency, static and dynamic performance and control and response speed, can solve the modeling problem of the existing spherical electromagnetic driving joint three-dimensional complicated magnetic field, realize precise modeling of the spherical electromagnetic driving joint magnetic field and precise decoupling of electromagnetic coupling and mechanical coupling, and remarkably improves the response sensitivity and positioning precision of electromagnetic driving spherical joint control.

The invention provides an inverted pendulum non-linear controller design method, which belongs to the technical field of nonlinear control. According to the non-linear controller design method, a step controller design method is applied to the problem of inverted pendulum control, so that the whole performance of the controller is improved. The method is characterized by establishing a nonlinear model of an inverted pendulum system, designing a steady-state controller and designing a reference dynamic feedforward controller; designing a feedback controller: designing the feedback controller through a Lyapunov method for a closed-loop error system of an inverted pendulum; and finally, obtaining control laws of the whole system controller. The method not only solves the problem of limitation of a linear controller in a high-nonlinearity and complex-model multivariable system of the inverted pendulum, but also solves the problem that it is hard for intelligence algorithms of a cloud model and a neural network and the like to realize in the application process.

The invention relates to an electropneumatic braking method and an electropneumatic braking system with fault complementation control on the basis of single-axis control, which is characterized in that two independent embedded type electropneumatic braking units are adopted, and each unit comprises a control circuit, a piezoelectric relay valve, a piezoelectric ventilation valve and a corresponding pressure sensor; the two units are managed by a communication and management circuit and arranged near a steering frame; and two axles on the same steering frame are controlled by the two embedded type electropneumatic braking units respectively. The method and the system can greatly reduce the volume of a cylinder and a pipeline by directly controlling a single braking cylinder, and have the advantages of rapid control response, high precision and good safety.

The invention belongs to the field of machining technology and discloses a drilling and tapping machine. The drilling and tapping machine comprises a drilling module, a tapping module, a feeding module, a discharging module, a driving module and a control module. The feeding module, the drilling module, the tapping module, the discharging module and the driving module are all controlled by the control module; the feeding module is used for feeding workpieces; the driving module moves the workpieces to the drilling module for drilling, then to the tapping module for tapping and lastly to the discharging module for discharging. The invention also discloses a machining method of the drilling and tapping machine. The drilling and tapping machine is precise in drilling and tapping positioning, achieves integration of drilling and tapping and is high in response speed and high in control precision under the control of the PLC (programmable logic controller).

The invention discloses a speed sensorless control system based on a sliding-mode observer of a Kalman filter. The system comprises an inverter module, a PMSM module, a first Clark transformation module, a Park transformation module, a second Clark transformation module, a Kalman observer module, a first comparator module, a first PI adjusting module, a second comparator module, a second PI adjusting module, a third comparator module, a third PI adjusting module, a Park inverse transformation module and an SVPWM module; the revolving speed and the rotor position are estimated by adopting the sliding-mode observer of the Kalman filter, and speed regulation of the motor is controlled by estimating the rotor position and the rotor speed. According to the speed sensorless control system, the rotor position and the revolving speed information of the motor are acquired by replacing a mechanical sensor with a speed sensorless control algorithm, therefore, errors in closed loop feedback information are reduced, the calculation amount of a sliding-mode observer control method is decreased, and the system is easily achieved on engineering.

The invention discloses an axial-flow type adjusting valve which mainly comprises a valve body, an electric head, an adjusting controller, a connecting rod crank arm mechanism, a pressure sensor and a flow sensor, wherein the electric head is mounted in the valve body, the connecting rod crank arm mechanism is assembled in the valve body, and the pressure sensor and the flow sensor are mounted on an output tube. Output pressure and flow fluctuation signals are acquired on line by electronic integration technology and inputted to the adjusting controller for calculation, adjusting instructions are transmitted to the electric head, the electric head drives an adjusting rotation shaft to rotate, a valve spool is pushed by the connecting rod crank arm mechanism, opening of an adjusting valve port is changed to adjust output flow and pressure, and the output flow and the output pressure can be automatically adjusted and tend to be stable. The axial-flow type adjusting valve has the outstanding advantages of simple structure, convenience in mounting and using, high adjusting precision, high reaction speed, running safety and reliability, high automated control level and good conveying medium stability, and is particularly suitable for being mounted and used on a pipeline requiring high conveying medium dynamic stability.

The invention discloses a mechanical automatic gear box with a gear selecting and shifting mechanism with electromagnetic control, which consists of a mechanical automatic gear box and a gear selecting and shifting mechanism with electromagnetic control, wherein the gear selecting and shifting mechanism with electromagnetic control consists of a sliding shifting block assembly with an inner guide rail and a coil (120), a guide rail shaft (130), a shifting block (140) for shifting a shifting fork of the gear box, a spring (150) and a limiting body (160); and the middle sliding shifting block assembly (110) with the inner guide rail and the coil is positioned at a middle position of the guide rail shaft and can overcome spring force to slide on the guide rail shaft. If the device is used for changing the position of the shifting fork in the gear box, a general hydraulic, pneumatic and electric gear shifting device can be substituted. After the mechanical automatic gear box with the gear selecting and shifting mechanism with electromagnetic control is adopted, the gear selecting and shifting mechanism is simplified, the control reaction velocity is increased, and the reliability of the device is improved. The mechanical automatic gear box is suitable for mechanical automatic gear box control of a motor vehicle.

The invention relates to a bridge arm instantaneous current direct control method of a modular multilevel converter and belongs to the field of a power electronic equipment control technology. The method comprises the following steps: data required by control is acquired and obtained; a bridge arm current reference value is calculated by the use of each obtained current reference value; a bridge arm induction voltage reference value is calculated by the use of a bridge arm inductance value, a control cycle, the calculated bridge arm current reference value and a measured bridge arm current value; a bridge arm output voltage reference value is calculated by the use of an obtained AC port voltage reference value, a DC port voltage reference value and the obtained bridge arm induction voltage reference value; each bridge arm modulation reference wave is calculated by the use of the calculated bridge arm output voltage reference value and measured bridge arm total capacitor voltage; and the generated modulation reference wave is sent to a valve trigger pulse modulator so as to directly control bridge arm instantaneous current. The method has fast control response speed and is not influenced by the transient process. By the method, it is guaranteed that bridge arm overcurrent will not happen to a converter and capacitor overvoltage also will not happen.

The invention relates to an intelligent control method for outlet water temperature of an instant heating body. A single chip microcomputer and a temperature sensor R0 are included in the method, and the temperature sensor R0 is mounted at the bottom of a water storage container and connected with the single chip microcomputer. The single chip microcomputer detects water storage container temperature T0(t) of the temperature sensor R0 every fixed time, known water density is rho, specific heat capacity of water is C, internal resistance of the instant heating body is R, heat conversion efficiency of the instant heating body is K, outlet water flow of the instant heating body is set as Q, outlet water temperature is T2(t), a formula of Cx(T2(t)-T0(t))xrhoxQ=KxP is obtained according to a heat balance principle, wherein P refers to heating power of the instant heating body, P=PWMxV<2>/R, PWM refers to duty ratio of heating, V refers to power supply voltage, and accordingly a formula of Cx(T2(t)-T0(t))xrhoxQ=KxPWMxV<2>/R is obtained, and a formula of PWM=Cx(T2(t)-T0(t))xrhoxQxR/(KxV<2>) is obtained finally. The method has the advantages that control variable is computed based on inlet water temperature and outlet water temperature, so that processing of experience nature is avoided, and control of the instant heating body is achieved in theory.

The invention discloses an improved Kalman observer based control method free of a speed sensor. A sliding-mode observer of a Kalman filter is used to estimate the rotating speed and the rotor position, and speed regulation of a motor is controlled according to the estimated rotor position and rotor speed. A speed-sensor-free control algorithm is used to replace a mechanical sensor, the rotor position and rotating speed information of the motor are obtained, errors in closed-loop feedback information is reduced, and the control method based on the sliding-mode controller is low the computational complexity and easy to realize in the engineering aspect. The method of the invention has the advantages of including low cost, simple control algorithm, and capable of estimating the rotating speed and rotor position rapidly and precisely.

The invention provides an electro-hydraulic loading system of a thin-film biaxial tensile testing machine, belonging to the technical field of mechanics of materials and building materials. The system provided by the invention comprises a low-pressure filter, a hydraulic pump, a motor, a check valve, a pressure sensor, a stop valve, a power accumulator, an electromagnetic unloading valve, a proportional overflow valve, a throttling valve, an electromagnetic directional valve, four servo hydraulic cylinders, a drawing force and compression force sensor, a displacement sensor, a mechanical clamp, a filter, a cooler, an electromagnetic water valve, an oil tank and a unidirectional intercept valve. The system provided by the invention has the advantages of great drawing force, high precision,fast control response, simplicity, special purpose, movability and independent use and can be used for the thin-film composite material biaxial tensile testing machines of construction film material tests, airship skin tests and the like.

A control circuitry can be configured to receive an error signal indicating a difference between an output voltage of the power supply and a desired setpoint for the output voltage. According to one configuration, depending on the error signal, the control circuitry initiates switching between operating the control circuitry in a pulse width modulation mode and operating the control circuitry in a pulse frequency modulation mode to produce an output voltage. Operation of the control circuitry in the pulse frequency modulation mode during a transient condition, such as when a dynamic load instantaneously requires a different amount of current, enables the power supply to satisfy current consumption by the dynamic load. Subsequent to the transient condition, the control circuitry switches back to operation in the pulse width modulation mode.

The invention relates to an active clearance control method and system. The method comprises the steps that the current state of an aero-engine is judged, and if the aero-engine is in a steady state, a closed-loop control process which is achieved by a closed-loop controller and based on clearance-related parameter adjustment and an actuator affecting turbine clearance is selected and used; if the aero-engine is in a transition state, an open-loop control process which is achieved by an open-loop controller and based on clearance-related parameter adjustment and the actuator is selected and used. According to the method, when the aero-engine is in the steady state, the closed-loop control process based on clearance-related parameters is adopted to ensure high control accuracy of the turbine clearance in the steady state; when the aero-engine is in the transition state, the open-loop control process based on the clearance-related parameters is adopted to make turbine clearance control respond more quickly in the transition state and avoid frequent actuation, caused by slow response, of the actuator affecting the turbine clearance; as a result, high control accuracy of the turbine clearance in the transition state is acquired, and the control effect of active clearance is improved.

The invention discloses an electrostatic dust removal high-frequency high-voltage power supply system and a control method. The control method mainly comprises the steps that after the LCC resonance current and the secondary output voltage value of an electrostatic dust removal high-frequency high-voltage power supply pass a signal collection circuit, a conditioning circuit and an A/D switching circuit in sequence, a digital voltage signal is transmitted to a DSP control circuit; a DSP chip sends a PWM control signal to a digital logic unit and an IGBT driving circuit by combining the actual current and voltage values transmitted through a main circuit and comparing the actual current and voltage values with the preset values of the system; and the PWM control signal is used for controlling a full-bridge inverter finally by being processed and amplified. According to the control method related by the invention, the frequency converting control strategy and the phase-shifting control strategy are effectively combined, and disturbance of different stages of the system is subjected to hierarchical control through a double-loop-locked control structure, so that the dynamic characteristics of the system are improved, and the system has high adaptability to complex working conditions; and the frequency change of opening and closing is constricted, closing losses are effectively decreased, and the overall efficiency of the system is obviously improved.

A vibration controller includes a map controller, an adaptive controller, a set-up frequency judge/switcher, and an actuator. The map controller includes a data map storage for storing data on control signals determined in advance for a vibration insulator, and a signal generator for selecting one of the data, depending on a frequency of a cyclically pulsating signal emitted from a vibration generating source of a vehicle, from the data map storage and generating a control signal. The adaptive controller generates the control signal with respect to the cyclically pulsating signal using an adaptive control method. The set-up frequency judge/switcher switches from the map controller to the adaptive controller or vice versa based on the frequency of the cyclically pulsating signal. The actuator actuates an actuator of the vibration insulator based on the control signal generated by the map controller or the adaptive controller, whereby inhibiting the vehicle from vibrating.