12results about "Anti-hunting elements" patented technology

A motor control device includes a signal identifying unit and an overvoltage detecting unit. The signal identifying unit includes an optical isolator that converts an electrical signal supplied via a terminal to which an external device is connected and a switch that turns off a connection circuit connected to the terminal. The overvoltage detecting unit is configured to turn off the switch when a voltage applied to the connection circuit is greater than a threshold voltage.

In ERIT, it is necessary to set a reference model for generating a target command for an ideal response before FF control design, and if an appropriate reference model cannot be set, coupled vibration caused by a plurality of structures cannot be suppressed. Further, when the characteristics of the plant are partially or entirely unknown, it is practically impossible to provide an appropriate reference model. Therefore, an object of the present invention is to provide a design method and a design device for data-driven damping feedforward control that can eliminate the need to set a complicated reference model.SOLUTION: A feedforward control design method has a controller structure in which a plurality of feedforward controllers to be designed are provided, a denominator polynomial of each feedforward controller is common, and a numerator polynomial is a free parameter, and the free parameter is designed by solving an optimization problem for minimizing a deviation between a target command generated by one feedforward controller among the plurality of feedforward controllers and a predicted response.SELECTED DRAWING: Figure 2

Method for heating a coolant of an electrical traction machine of a motor vehicle, the electrical machine including, in addition to the coolant, a stator including a polyphase winding, the stator being in heat exchange with the coolant, a rotor, and an inverter / rectifier supplying power to the polyphase winding. The inverter / rectifier includes a plurality of switching cells controlled by a control device. The control device of the inverter / rectifier is configured to control the switching cells so as to short-circuit the polyphase winding in predetermined conditions for the purpose of heating the coolant.

A continuously adjustable valve (10) with a valve slide (14) which can be displaced by an actuator (18) in a valve housing (12) and with an electronic control unit (16; 116) which controls a pressure regulator (2) for determining a control deviation (Δp) between an internal setpoint pressure (p) is revealed. soll int ) and an actual pressure (p ist The pressure regulator (2) controls a setpoint (6) for the actuator (18) depending on the pressure control deviation (Δp). A minimum value generator (1) is used to determine the internal setpoint pressure (p). soll int ) by selecting the lower value of an external target pressure (p) soll ext ) and on the other hand a system pressure (p sys ) is planned. A corresponding procedure has also been disclosed.

The invention relates to a power generation method for powering at least one electrical grid of an aircraft using a power generation system, the aircraft comprising two power supply paths, each power supply path comprising an electrical converter and a generator, the power system comprising two regulation units (21a) respectively associated with each power supply path, each regulation unit (21a) comprising a correction module (5), the correction module comprises an integral corrector (CI), the method comprising the following steps performed for the correction module (5): determining a power setpoint (PBP *) from a distribution voltage setpoint (VDC *) and a measurement of the distribution voltage (VDC); determining a divergence indicator (M3) from the gradient (GPBP *) of the power setpoint (PBP *); and resetting the integral corrector (CI) of the adjustment unit (21a) of the power supply path according to the divergence indicator (M3).

The invention discloses a model identification and damping control method and system for a network-forming converter, and belongs to the technical field of power systems. The method comprises the following steps: injecting a pre-generated test signal sequence into an active power reference instruction of a network-forming converter to excite a system to generate a dynamic response; response data of the system under excitation of the test signal sequence is collected, and the response data and the test signal sequence form an evolution type time sequence data set; based on the evolution type time sequence data set, an equivalent linear model for describing system dynamics is calculated through a Koopman operator identification method; calculating to obtain a state feedback gain matrix by solving a linear quadratic optimal control problem; generating a damping control signal based on the state feedback gain matrix and system state data acquired in real time, and superposing the damping control signal to a control instruction of the network-forming converter; according to the method, the risk of performance reduction and even instability caused by model mismatch in a traditional method is overcome.

The present application relates to a kind of vehicle ride comfort damping tuning method and tuning system, it includes the following steps: based on input voltage control damper's damping variation;Judge whether the acceleration of damper satisfies preset condition, if yes, the damping parameter of damper is output, otherwise the size of input voltage is adjusted to continue the above-mentioned step.This application embodiment provides a kind of vehicle ride comfort damping tuning method and tuning system, since directly adjusting the input voltage of damper can realize the change of damper damping, and then according to the acceleration value of damper, whether the damping of damper is in the optimal state can be judged, without replacing damper in the whole tuning process, the adjustment duration can be substantially reduced, in addition, since the adjustment direction does not need professional judgment, can get rid of the dependence on personal experience, the difference of debugging result is smaller using the same system.Due to be separately additional system, can be used repeatedly at one time, only need to detect the accuracy of adjustment periodically.

A method for operating an electric drive system is provided. For example, a controller retrieves from memory a predictive model indicating a predicted winding temperature associated with a known negative temperature coefficient (NTC) temperature, wherein the predictive model is based on historical NTC temperatures and historical winding temperatures, and one or more operating parameters. The controller receives current NTC information indicating one or more current NTC readings corresponding to one or more switching devices within the inverter. The controller determines an estimated winding temperature corresponding to the motor based on the predictive model and one or more current NTC readings and the current operating parameters. The controller provides instructions based on the estimated winding temperature to adjust the motor input.

A characteristic calculation device includes a sensor information obtainer that obtains position information indicating a position of a motor as detected by a position detector, and acceleration information indicating an acceleration of a movable part connected to the motor as detected by an acceleration sensor attached to the movable part; and a sensor characteristic calculator that calculates and outputs at least one of balance information or detection sensitivity information, based on the position information and the acceleration information, the balance information indicating a degree of matching between a direction of an axis of detection by the acceleration sensor and a direction of acceleration to be detected by the acceleration sensor, the detection sensitivity information indicating a detection sensitivity of the acceleration sensor.

The embodiment of the invention provides a power system damping controller setting method and system based on artificial intelligence, and belongs to the technical field of damping controller setting. The method comprises the steps that power grid operation data and energy storage unit operation data are collected, a state vector is input into a deep reinforcement learning model, the deep reinforcement learning model outputs the parameter adjustment amount of a damping controller, and the proportional gain and the integral gain of the damping controller are updated according to the parameter adjustment amount; a control instruction used for adjusting active power output of the energy storage unit is generated through the outer-layer damping adjusting ring and the inner-layer energy compensation ring; and calculating a reward value based on the power system response, updating the deep reinforcement learning model according to the reward value, and realizing adaptive setting of the damping controller. According to the invention, the adaptive optimization setting of the parameters of the damping controller is realized through the deep reinforcement learning model; and power oscillation suppression and energy storage energy self-balancing are cooperatively realized by combining a double-layer control loop, so that the transient stability and toughness of a power system are remarkably improved.

The invention relates to an electrical generation method for supplying power to at least one electrical network of an aircraft using an electrical generation system, the aircraft comprising two power supply paths, each power supply path comprising an electrical converter and an electrical generator, the electrical system comprising two regulation units (21a) respectively associated with each power supply path, each regulation unit (21a) comprising a correction module (5) comprising an integral corrector (CI), the method comprising steps consisting, for the correction module (5), in: determining a power setpoint (PBP*), from a distribution voltage setpoint (VDC*) and from a measurement of the distribution voltage (VDC), determining a divergence indicator (M3) from a gradient (GPBP*) of the power setpoint (PBP*), and resetting the integral corrector (CI) of the regulation unit (21a) of the power supply path depending on the divergence indicator (M3).

Device that performs position control of a servo motor, wherein the servo motor position control device comprises: a position control device (5) which derives and outputs a speed command signal corresponding to a target speed of the servomotor (1) from a position deviation by means of proportional control, for which a position signal corresponding to an actual position of the servomotor (1) is subtracted from a position command signal corresponding to a target position when driving the servomotor (1); a speed control device (6) that derives and outputs a current command signal corresponding to a current value to be applied to the servomotor (1) by means of proportional-integral control from a speed deviation, for which a speed signal corresponding to an actual speed of the servomotor (1) is subtracted from the speed command signal; and a q-axis current control device (7) which derives and outputs a q-axis voltage command signal corresponding to a voltage applied to a q-axis of the servo motor (1) from a current deviation by means of proportional-integral control, for which a q-axis current signal corresponding to a current value actually flowing with respect to the q-axis of the servo motor (1) is subtracted from the current command signal, wherein integral control in the q-axis current control device (7) is interrupted when the servo motor (1) reaches the target position in order to cancel the position deviation, wherein the proportional-integral control in the q-axis current control device (7) is switched to proportional control while the value of the current command signal is held at a value at the time when the position deviation is canceled.