DC (direct control) servo drive control system

Abstract

An DC servo drive control system consists of a data acquisition circuit, a DSP (Digital Signal Processor) CUP (central processing unit) and a PWM (Pulse-Width Modulation) power output circuit, wherein the DSP CUP includes a second order active-disturbance-rejection controller and a PI (proportional-integral) controller. The input end of the DSP CUP receives a velocity set value sent by an upper computer and an DC servo-motor velocity feedback value and a current feedback value which are sent by an external sensor in a feedback mode, and the velocity set value, the DC servo-motor velocity feedback value and the current feedback value are output to the PWM power output circuit after being processed by the DSP CUP; and the output end of the PWM power output circuit is connected with an DC servo-motor which is the controlled object of the DC servo drive control system. The input end of the data acquisition circuit is connected with the external sensor, the output end of the data acquisition circuit is connected with the input end of the DSP CUP, the data of the DC servo-motor collected by the external sensor are transmitted to the PWM power output circuit after being sent to the DSP CUP for being processed through the data acquisition circuit, and the WM power output circuit outputs control signals to control the DC servo-motor.

Description

technical field [0001] The invention relates to a DC servo drive control system based on an active disturbance rejection controller. Background technique [0002] The DC servo drive system in some applications requires the control system to have the characteristics of fast dynamic response, high stability and precision, and strong resistance to load and parameter disturbance, such as the electric pitch servo drive system of wind turbines. In the servo drive system, the resistance value and inductance value of the armature winding of the executive motor are easily affected by temperature, and the motor parameters provided by different manufacturers are also different. The influence of these factors will reduce the performance of the conventional PID closed-loop control system. Although conventional PID controllers can meet the requirements of high steady-state precision and fast dynamic response, they are poor in anti-disturbance ability of load and motor parameters. [0003...

AI Technical Summary

Problems solved by technology

Such a control system structure can meet the requirements of high steady-state precision and fast dynamic response, but it lacks a certain anti-disturbance ability in terms of control system effect deterioration caused by factors such as controlled object parameter disturbances and load fluctuations.

[0004] Chinese patents CN201039069Y, CN102811015A and CN101499769A, and "DC Double Closed-loop Speed ​​Regulation System Based on Active Disturbance Rejection Controller" (Xu Han, Xu Yu, Liu Dejun. [J]. Chemical Technology, 2004, 06(12): 42-44 ) The main idea is to apply the ADRC controller directly or after simplified transformation to the control system, which has the characteristics of fast response speed and strong anti-disturbance ability. Most of the control objects are AC motors or excitation devices, etc. A few articles involve DC motors The articles only stay at the stage of simulation research, and seldom involve the practical application of DC servo drive control system with high performance requirements.

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