Papers by Keyword: ADRC

Abstract: For the shortcomings of large overshoot and poor anti-disturbance ability when using the traditional PID control, ADRC control algorithm that is a nonlinear state error feedback control algorithm has been proposed in the sophisticated control system of static reactive power generator. The simulation results show that the algorithm can make the system reactive power compensation more quickly and more effectively, therefore the control strategy is feasible.

Abstract: Aiming at the problems of disturbance, coupling and fluctuation of load existing in permanent magnet synchronous motor (PMSM),which is used in the servo system of self-propelled gun, the auto disturbance rejection control technique (ADRC) is introduced into in the servo system of self-propelled gun. It can play with the best effect of the servo control system. The simulation results show that ADRC makes the servo system of self-propelled gun has better accuracy and robust.

Abstract: Based on structure analysis of a certain ship-borne servo control system, the target velocity is contributed to exterior unknown disturbance and the system parameter change is looked as interior unknown disturbance. The extend state observer is used to estimate the disturbance accurately with the input and output information of system response, then the controller can compensate the disturbance furthest. The simulation results show that the ADRC method has good robust performance, compared with the traditional PID controller. Without using the sensor to measure the target state, it can satisfy the system requirements with a simple structure, it shows the controller has good aspect to have good engineering function and prospect.

Abstract: Aimed at rejecting the disturbance for Ship-borne Servo Control System, using the ADRC method to improve the disturbance rejection ability of system. And the model is validated by PID, the simulation results show that the anti-interference ability could be improved by of ADRC method, and the controller has engineering function and prospect.

Abstract: An improved controller based on ADRC is proposed for motion control with high frequency disturbance. Firstly, relationship between bandwidth of LESO and its parameters was mentioned, and bandwidth limitation come from the sensor noise is presented, indicating weakness of traditional LESO on compensation high frequency disturbance. Based on such analysis, two FIR filters is designed and added into the control loop, which compensated the specified high frequency disturbance and expanded bandwidth of LESO, acquiring a better motion control result. Simulations are taken, showing validity of the improved controller.

Abstract: In order to achieve precise speed control for cutter suction dredger cutter motor, the controller should adapt well to uncertainties, such as geological environment, water flow, mechanical disturbance, etc. It makes the design of cutter motor controller always a hard work. This paper proposes an active disturbance rejection controller (ADRC) approach for cutter suction dredger cutter motor variable frequency drive system. Firstly, the LabVIEW platform was established by virtual instrument technology, which collected operating data of cutter motor in fundamental wave and total harmonic distortion (THD). Then cutter motor motion mathematic model was built and the ADRC design method was introduced. Lastly, the simulation results in the cutter velocity control and disturbance environments were done. The results show that the ADRC controller has strong robustness, and the precise speed control can be implemented.

Abstract: For the attitude control of flying wing UAV, need to consider the problems of model parameters perturbation and external disturbances, and resolve the special problems of redundant control surfaces and nonlinear control efficiency. The control problem of attitude tracking is investigated based on active disturbance rejection control (ADRC) and multi-object nonlinear control allocation. ESO are designed to estimate and compensate for disturbance. It can improve both the robustness and control performance of the control system. Control allocation make full use of the redundant control effectors to realize the integrated tradeoff multi-object control allocation under varying flight conditions and missions.

Abstract: Since Small Unmanned Helicopter flight attitude control process has strong time-varying characteristics, and there are random disturbances, the conventional control methods with unchanged parameters are often unworkable. An on-line adaptive ADRC control system is designed in this paper. An on-line adaptive ADRC system implements a simultaneous on-line tuning of ADRC rules and output scale of ADRC control system. The flight experiment showed that the proposed adaptive ADRC system provides quicker response, smaller overshoot, higher precision, robustness and adaptive ability. It satisfies the needs of autonomous flight.

Abstract: The system considered in this paper is a half toroidal Continuously Variable Transmission (CVT) system for cars. The existing CVT controllers most adopt to PID to design the controller, but the precision and reliability do not meet the requirements of the CVT well. The ADRC (Auto Disturbances Rejection Controller) technology is able to solve the nonlinear systems whose model is difficult to get and has many uncertain external disturbances. The ADRC in this paper is used to combine with the half toroidal CVT to design a robust, reliable, anti-jamming and feasible controller.

Abstract: In order to improve the performance of the converter for restrain the machine-side PWM rectifier load disturbance impact on the output DC voltage in direct-drive wind power system. A hybrid control strategy based on ADRC and the EL model was presented, using ESO to observe and compensate the load disturbances, achieving voltage outer control by ADRC method and comparing with PI control. However, as to grid-side PWM inverter, energy shaping method which based on PCHD model and the IDA-PBC control algorithm is adopted to design passivity-based controller, which is able to make the energy function have the minimum value when inverter is at the desired point, thus improving the stability and the load disturbance-rejection ability for the inverter. Simulation results show that the machine-side PWM rectifier can make the currents and voltages of AC side achieve synchronous, DC voltage can fast-track desired values; grid-side PWM inverter can achieve unity power factor and make the AC current sinusoidal.