33results about How to "Output response is fast" patented technology

The invention relates to a step level output circuit, comprising a reference source circuit, an intermediate level drive circuit, a control circuit, a first P type transistor, a first N type transistor and a second N type transistor. The intermediate level drive circuit comprises a current source, a second P type transistor, a third N type transistor and a capacitor. A threshold voltage Vthp of the second P type transistor, the threshold voltage Vthn of the second N type transistor, an intermediate voltage V1 output by an output end of the step level output circuit and a reference voltage VF output by the reference source circuit have the following relationship: VF=V1+Vthn-Vthp. Through adoption of the circuit of the structure, the output response is fast, the circuit is applicable to bandwidth application of a wide range, the structure is concise, a maintenance current is low, only three drive tubes are required, an area of a chip is reduced, a cost performance ratio is improved, and moreover, the fast response feature is kept, and the application range is wide.

Provided is a plate spring type rigidity and flexibility driver based on transmission of gears and racks. The driver includes a machine frame, a power input and transmission mechanism and an output mechanism. The power input and transmission mechanism includes two motors, the gears, the racks, a rack bracket, connecting rods and sliding blocks; the output mechanism includes an output cylinder, plate springs, two output plates and output plate connectors, and the plate springs are installed on the output cylinder and constitute a moving pair along with the sliding blocks; one end of each outputplate is fixedly connected to the output cylinder, and the other ends of the output plates are fixedly connected with each other through the output cylinder. By adopting a double-motor parallelly-connected adversarial structure, the output response is faster; by adopting the plate springs as elastic elements, a variable rigidity module structure of the driver is much simpler, and the driver is compact in structure and highly symmetrical.

The invention discloses a high-precision battery model, which includes a micro control unit MCU, a power supply unit, a temperature simulation unit, a battery simulation unit, and an RS485 communication unit; The unit uses high-precision ADC and DAC for output sampling and control, which can simulate faults such as short circuit, open circuit, and reverse connection; the temperature simulation unit outputs analog temperature voltage through the micro control unit MCU to simulate the real battery temperature; the RS485 communication unit connects The 485 communication interface on the micro control unit MCU realizes the control of the battery simulation unit. Compared with the battery simulators on the market, the high-precision battery model of the present invention has higher output precision and faster response speed, and adopts isolated output to simulate battery modules in multi-stage series.

The invention discloses an automatic fillet weld welding control method and device for a laser displacement sensor. The method and the device are used for fillet weld tracking, fillet weld groove recognizing and automatic welding parameter adjusting of a special automatic welding machine. A system adopted in the method adopts the laser displacement sensor to carry out displacement sensing on a fillet weld groove, and an automatic welding controller is utilized for carrying out data sampling on signals output by the laser displacement sensor; in the weld deviation detection process, for sampled data, a three-harmonic decoupling algorithm is adopted for detecting fillet weld lateral deviation, a morphological filtering threshold value method is adopted for detecting fillet weld longitudinal deviation, and according to the weld deviation, a cross-shaped sliding frame is driven to adjust the position of a welding gun; and when the fillet weld groove is recognized, a double-harmonic decoupling algorithm is adopted for recognizing the angle of the fillet weld groove, and according to the angle of the groove, working parameters of a digitalized welding power source are adjusted automatically. By the adoption of the method, the fillet weld deviation can be accurately detected, the angle of the fillet weld groove can be recognized, the welding parameters can be adjusted automatically, and automatic welding efficiency and quality are improved.

The invention discloses an ECPT system output voltage stability control method based on NSGA-II parameter optimization. A PID controller is adopted for conducting output voltage stability control on an ECPT system, a broad sense state space average model of the ECPT system is established, and based on the model, the method through which the NSGA-II multi-objective and multi-constraint genetic algorithm is utilized for conducting automatic optimization on control parameters of the PID controller is put forward. According to the optimization method, a group of optimal PID control parameters are searched out automatically under the multi-objective and multi-constraint condition, it is guaranteed that under the action of the PID controller and when the ECPT system load and transmission distance are varied within a certain range, the output voltage of a closed-loop system can still maintain the effect that the uprising time is short, the steady state error is small, and the Robust performance is good, thereby the Robust performance and transmission performance of the ECPT system are improved.

The invention belongs to the technical field of batteries, and in particular relates to a multi-power supply system containing supercapacitors and a control method. The system includes a supercapacitor, a DC / DC converter, a battery and a system control unit; the system control unit includes an acquisition module, a charging and discharging module, a microprocessor module and an equalizing module. The multi-power supply system containing supercapacitors of the present invention determines the parameters of supercapacitors through energy, cost and volume, selects multi-power supply operating modes according to the state of charge, and reasonably allocates the energy and power input or output of supercapacitors and batteries, effectively alleviating The impact damage of high current to the battery can improve the service life of the battery, improve the output response, improve the system efficiency, and manage the balance of the battery.

The invention discloses a multi-DC motor parallel fault-tolerant system and a fault-tolerant control method. The speed obtained by the position sensor under the action of the rotational speed calculation unit is fed back to the speed adjustment module, and the current of the motor obtained by the current detection sensor is under the action of the motor fault detection signal. The current value obtained by the current calculation unit is fed back to the current regulation module; the reference speed and the feedback speed signal are obtained under the action of the speed comparator to obtain the speed error and the current is obtained through the PI controller; then the reference current is obtained under the action of the motor fault detection signal; The current value of the motor current signal is obtained under the action of the motor fault detection signal; the current error is obtained by the reference current and current under the action of the current comparator, and the duty ratio is obtained through the hysteresis control comparator; and then controlled by the PWM pulse generation unit The on-off pulse control signal of the switching tube in the (n+1) phase inverter. The invention ensures efficient and stable operation of the motor and improves industrial production efficiency.

There is realized a control device capable of speeding up an output response without causing deterioration in the resolution of a time-proportional output. The control device controls a control object at a ratio of ON-time to OFF-time for a time-proportional output. The control device comprises a PID computation unit for executing PID computation of deviation between a set value and a measured value from the control object, an integrator for sequentially adding up control output values each representing the result of the PID computation executed by the PID computation unit, an ON / OFF determination unit for determining whether the time-proportional output is turned ON or OFF on the basis of an integrated value of the integrator, and a time-proportional output unit for turning the time-proportional output ON / OFF on the basis of a determination value of the ON / OFF determination unit.

The invention relates to an MRI (Magnetic Resonance Imaging) B0 cancellation amplifier based on a PID (Proportion Integration Differentiation) regulation technology and a PWM (Pulse-Width Modulation) technology. The MRI B0 compensation amplifier comprises a positive-negative power supply module and a compensation amplifying circuit board, and technical measures such as amplified filtration, negative feedback, PID frequency response regulation, positive feedback, PWM, PWM waveform shaping based on an FPGA (Field Programmable Gate Array), an isolation driving technology, signal multiplication, signal filtration and reduction, electric current sampling, electric current monitoring and over-current protection are adopted. The MRI B0 compensation amplifier has the following advantages that: feedback gain demands are proper, so that the system operation is more stable; by virtue of PID regulation, the load matching range of the compensation amplifier is wider; the defects that small matching range and self excitation occurring in an unmatched load range of a common amplifier are solved; the response output speed can be quickened to a certain extent, so that over-slow response speed caused by over-high load sensibility can be avoided; a PMW switching mode is adopted, the efficiency of the compensation amplifier can be up to 90%, and the defect of low efficiency of the common amplifier is solved.