32results about How to "Eliminate the effects of controls" patented technology

The invention relates to stainless steel coiling welding leader tape method. It includes the following steps: material annealing acid cleaning line tail welding tape steel head leader tape, digging edge for the welding seam; material annealing acid cleaning line coiler coiling; steam transferring steel coil; unfolding the steel coil outer ring and straightening; welding the outer ring leader tape and digging edge for the welding steam; unreeling the steel coil; coil stripping. The invention can be used in stainless steel leader tape or other steel leader tape, has little device investment, high correlate device utilization factor, and only needs part of unreeling to realize stainless steel coil two ends welding.

The invention discloses an automatic aperture control device and an automatic aperture control method of a full HD (High-Definition) camera. The automatic aperture control device comprises a CMOS (Complementary Metal Oxide Semiconductor) sensor, an operation module and auxiliary equipment which are connected in sequence. The operation module comprises a frame brightness calculated value calculation module, an actual brightness value calculation module and a brightness difference calculation module, and is used for removing the brightness gain from the brightness calculated value of the frame and calculating the actual brightness value of the frame for aperture control. With the device and the method, the influence of the exposure and the gain value in the CMOS sensor on the aperture control is eliminated, the aperture control is accurate, the implementation method is simple and the cost is reduced.

The invention relates to a video camera system of discovering and tracking automatically abnormal targets. Camera lens, video camera, image collecting unit, image processing unit, turntable control unit, turntable consist of a closed loop control system. The image collecting unit converts standard television signals output by the camera into 16-bit digital video signals. The image processing unit outputs the center position of the biggest abnormal target after detecting abnormal targets, and outputs the zooming control of lens of the camera according to the size of targets and the position in the visual field. The turntable control unit gives an alarm to the monitoring center, controls rotation of the turntable to make the light axis of the camera installed in the turntable point to the abnormal targets detected, and adjusts automatically the zooming multiple to make the monitoring center obtain clear and intact video image about the abnormal targets. The invention realizes the quick detection and track about invading targets.

The invention discloses a current-limiting automatic regulator for a motor, comprising a first sampling circuit; a first controller; a second controller; a second sampling circuit; a voltage dividing circuit; a boosting circuit; and a comparator; The first output terminal of the second controller is connected to the non-inverting terminal of a first voltage amplifier, the second output terminal of the second controller is connected to the non-inverting terminal of a second voltage amplifier, and the output terminal of the second voltage amplifier is connected to the first terminal of the inductor , the output end of the first voltage amplifier is connected to the first end of the first resistor. The invention adjusts the current limiting value of the motor in real time according to the motor speed and DC voltage, thereby improving the reliability of the motor operation.

The invention discloses a vehicle clutch control mechanism driven by a voice coil motor, which comprises a vehicle controller, a voice coil motor, an electromagnetic lock, a rocker arm type shift fork, a release bearing and a clutch. The drive current output terminal of the vehicle controller is connected to the drive signal input terminal of the voice coil motor, the digital switch output module of the vehicle controller is connected to the control signal input terminal of the electromagnetic lock, and the push rod of the voice coil motor is provided with a groove. The lock head of the electromagnetic lock matches the groove on the push rod. The end of the voice coil motor push rod is fixedly connected to the top of the separated rocker part of the rocker arm type shift fork, and the shift fork part of the rocker arm type shift fork is connected to the part of the release bearing. The outer ring is fixedly connected. The invention adopts a voice coil motor to realize linear motion, reduces conversion devices such as worm gears and ball screws, and has simple structure, low noise, fast speed and high precision.

The present invention provides a air duct air -conditioning indoor unit constant air volume control system and method. The central processor of the present invention outputs a constant duty cycle D -drive DC motor, the speed detection module detects the speed of the DC motorThe speed comparison module; the speed comparison module compares the speed value of the speed unit with the motor speed value of the speed unit, obtains static pressure and outputs it to the storage module.The motor speed value is controlled and the DC motor reaches the speed value.The present invention can realize the automatic recognition of static pressure according to the length of different ducts, achieve the control of the constant air volume, and achieve the output of the constant air volume under any static pressure conditions.

The feed-forward decoupling vector control method for the operation of the inverter with an output reactor includes the following steps: before the inverter runs, input the inductance and resistance parameters of the three-phase AC reactor configured by the inverter into the controller of the inverter ; When the inverter starts to run and the controller performs vector control, the controller will cooperate with the three-phase output current of the inverter detected by the internal current sensor of the inverter and the motor speed obtained by the motor speed measuring device according to the parameters of the three-phase AC reactor input offline. , to calculate the deviation between the voltage vector at the motor input terminal generated by the three-phase AC reactor and the expected output vector of the frequency converter; and then perform feed-forward compensation for this deviation in the output voltage reference waveform of the controller. The beneficial effects of the present invention: through the feed-forward compensation, the stator voltage vector obtained at the input end of the motor is completely consistent with the expected output voltage vector of the frequency converter, and the influence of the reactor inductance on the actual voltage vector control is eliminated.

The invention discloses a cascade robust fault-tolerant predictive control method of a permanent magnet synchronous motor. The implementation steps of the method include obtaining the rotational speed, voltage and current of the permanent magnet synchronous motor, and designing a fault detection integral terminal sliding mode observer to obtain observation of fault items. value; design a robust fault-tolerant predictive speed controller, calculate the q-axis command current according to the given speed, response speed, and fault item observations; design a robust fault-tolerant predictive current controller, according to the given current, response current, and fault item observations Value to calculate the command voltage, through inverse Park transformation, SVPWM module modulation to generate PWM pulse signal, so as to drive the permanent magnet synchronous motor to work. The invention realizes fast, robust and no static error tracking of the rotational speed and current of the permanent magnet synchronous motor, and improves the control accuracy and operation reliability of the permanent magnet synchronous motor. The invention is beneficial to expand the application of the permanent magnet synchronous motor in occasions with harsh environments and high reliability requirements.

The invention discloses a current limiting protection controller of a motor, a voltage sampling circuit, a first controller, a second controller, and a current sampling circuit, which collects a current signal corresponding to the stator winding phase of the voltage sampling circuit, and the current sampling circuit The output terminal is connected to a third controller; a voltage divider circuit, a boost circuit, a comparator, and a voltage stabilizing unit, which include a rechargeable battery pack and voltage stabilizing capacitors arranged at both ends of the battery pack, and the input terminal of the battery pack passes through a The charger is connected to a power supply, the output end of the motor power supply is connected to the output end of a power drive unit, the power input end of the power drive unit is connected to the three-phase AC power supply through the first switch group; both ends of the voltage stabilizing capacitor are connected through the second switch group connected to the DC bus of the power drive unit. The invention adjusts the current limiting value of the motor in real time according to the magnitude of the voltage on the motor winding and the rate of change of the current, thereby effectively ensuring the safe operation of the motor and avoiding damage to the motor caused by overcurrent.

This invention is an athwart control current tracking control method based on average current compensation. The processes are as follows: 1) the measuring signal is output through reseting integrating device; 2) found device average current mode; 3) calculate reactive amount i(KT); 4) athwart estimate the control law based on instantaneous current relation, get the break over time of the control switch; 5) compare the space-taking of invariableness frequency triangle wave and the output of the controller to get open of the driving and controlling switch and PWM pulse of the output. This invention wipes off the influences of resonance and aiguille signal caused by current changing of the switching components, and it does not need input filter and reduces the influences of the changing measuring signal. Because this invention adopts the compensation, so when the referential signal changes abruptly, it also can track.

The invention discloses a control method of a high-accuracy adjustable servo motor. The control method comprises the steps of 1, dividing a plurality of rotational speed zones and temperature zones; 2, recording a curve graph of a current deviation value, changing with a rotor position, of the servo motor under each rotational speed zone and each temperature zone; 3, performing parameter self-setting of the servo motor; 4, providing a rechargeable battery pack, and arranging a capacitor between a positive electrode and a negative electrode at an output end of the battery pack; 5, respectivelyarranging three inversion circuits at two ends of the capacitor, wherein the difference among voltage phase sequences of output second ends of the three inversion circuits is 120 degrees; and 6, connecting a power input end of the servo motor to a three-phase AC power supply, acquiring a phase voltage and a phase current of three phase inputs of the servo motor in real time, and switching the output second ends of the three inversion circuits as an input power supply of the servo motor when the phase voltage of an arbitrary phase input exceeds a set voltage range. By the control method, the technical problem that the control accuracy of the servo motor cannot be further improved is solved.

The invention discloses a motor control system, and a compensation method and a compensation device of direct current bus voltage of the motor control system. The motor control system comprises a rectifying circuit, an electrolytic capacitor, an inverter circuit and a voltage sampling circuit used for sampling the direct current bus voltage. The compensation method comprises the following steps of acquiring frequency of an alternating current input power supply; calculating a phase deviation generated during sampling of the voltage sampling circuit according to the frequency of the alternating current input power supply; and compensating the direct current bus voltage according to the phase deviation to control the inverter circuit according to the compensated direct current bus voltage. Therefore, an influence of a ripple wave on motor control can be eliminated by compensating the direct current bus voltage; precise control on a motor can be realized; and stepout outage of the motor can be effectively avoided.

The invention discloses a driving control system used for a servo motor. The input end of a servo driving circuit is connected with the output end of a controller of the servo motor; the output end ofthe servo driving circuit is connected with the signal input end of a servo driver; the power supply input end of the servo driver is connected with a three-phase alternating current power supply; the power supply output end of the servo driving circuit is connected with the power supply input end of the servo motor; the power supply input ends of three inversion circuits are connected with the two ends of a capacitor, and the power supply output ends of the inversion circuits are connected with the power supply input end of the servo motor; the input end of the inversion driving circuit is connected with the output end of the controller, and the output end of the inversion driving circuit is connected with the control ends of the inversion circuits; a stand driving signal generator is connected with the input end of the controller; and a comparison module is connected with the controller, wherein the three-phase alternating current power supply or the inversion circuits can be connected with the power supply input end of the servo motor according to the comparison result of the comparison module. By virtue of the driving control system, the technical problem of incapability of accurate control on the servo motor can be solved.

The invention discloses a motion control method of a CT bed based on time-series track points, which includes: receiving the first segment of track point data; receiving a starting motion command, controlling the motor to enter a motion state and executing the first segment of track point data; feedback with the motor Start the status word data of the time information; receive the second segment of track point data based on the status word data; receive the track operation data; after executing the first segment of track point data and the second segment of track point data in sequence, execute the track operation data to control the motor Carry out the corresponding trajectory movement. The invention eliminates the influence of the network delay on the running precision of the motor, and improves the control precision. The invention also discloses a motion control system of the CT bed based on time series trajectory points.