Built-in permanent magnet synchronous motor anti-interference controller and design method thereof

Abstract

The invention discloses a built-in permanent magnet synchronous motor anti-interference controller and a design method thereof. The controller comprises a controller unit, a nonlinear observation unitand an execution unit. The designed anti-interference controller does not depend on an accurate mathematical model, and the overshoot problem is solved. It can be known from the simulation tracking effect that no overshoot phenomenon occurs. The designed nonlinear observation unit has the characteristic of higher response speed. The number of adjustable parameters is reduced to two, and the complexity of parameter adjustment is greatly reduced through the design of the nonlinear observation unit by adjusting the parameters beta and delta. According to the nonlinear observation unit, externalload disturbance and internal uncertain parts of the built-in permanent magnet synchronous motor are used as total disturbance. The built-in permanent magnet synchronous motor can accurately observe and estimate the total disturbance, speed and position, the simulation result shows that good tracking performance can be realized. The dynamic performance and anti-interference capability of the built-in permanent magnet synchronous motor are improved. The built-in permanent magnet synchronous motor is beneficial to the application in a control servo system.

Description

technical field [0001] The invention belongs to the field of position tracking control of permanent magnet synchronous motors, in particular to a built-in anti-interference controller of permanent magnet synchronous motors and a design method thereof. Background technique [0002] The permanent magnet synchronous motor has the advantages of compact structure, high work efficiency, good control effect and high reliability, and is widely used in the fields of national defense, aerospace and industrial production. In order to meet the requirements of high-speed, high-precision servo system control, different control methods are applied to permanent magnet synchronous motors. The currently applied controllers mainly adopt the PI control method. PI control is linear control. The principle is relatively simple. It is suitable for systems with small load changes, but the anti-interference ability is poor, and its control performance is easily affected by temperature changes, extern...

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Problems solved by technology

[0005] First, the performance of the PI controller is affected by the operating point and external disturbances, so that the system has a contradiction between rapidity and overshoot. At the same time, its parameter setting needs to be determined according to specific working conditions, and it is difficult to achieve a satisfactory control effect. ;

[0006] Second, the existing sliding mode control, model predictive control, etc. rely too much on the precise mathematical model and theoretical derivation of the permanent magnet synchronous motor. When there are problems such as external disturbances and changes in system parameters, it is difficult to obtain an accurate mathematical model. It will inevitably have an impact on the control system;

[0007] Third, for problems such as external disturbances and changes in system parameters, the existing neural network-based control methods can approach the uncertainty of system parameters and suppress external disturbances. Although this method is easy to implement in simulation experiments, it is not practical in practical applications. , there are disadvantages such as large amount of algorithm calculation and difficult parameter adjustment

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