Active-disturbance-rejection control method and system for speed regulation system of permanent-magnet synchronous motor

Abstract

The embodiment of the invention discloses an active-disturbance-rejection control method and system for a speed regulation system of a permanent-magnet synchronous motor. The active-disturbance-rejection control method comprises the steps of acquiring a rotor angular speed and a torque current of the speed regulation system of the permanent-magnet synchronous motor; processing the rotor angular speed and the torque current by employing an active-disturbance-rejection model which is built in advance and is adaptive to disturbance to obtain a control output signal; performing rotational speed control on the speed regulation system of the permanent-magnet synchronous motor according to the control output signal, wherein the active-disturbance-rejection model is built according to a first-order linear active-disturbance-rejection control sub-model, a rotational inertia identification sub-model and a load torque observation sub-model, the rotational inertia identification sub-model is built according to a Landau identification algorithm, and the load torque observation sub-model is built according to an expansion state observer; and adjusting control gain b0 of the system according to the identified rotational inertia and a calculation relation b0=Kt / J. According to the active-disturbance-rejection control method disclosed by the embodiment of the invention, the adjustment accuracy of the control grain b0 is improved during the application process, and the anti-interference capability of the speed regulation system of the permanent-magnet synchronous motor is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of permanent magnet synchronous motor control, in particular to an active disturbance rejection control method and system for a permanent magnet synchronous motor speed regulation system. Background technique [0002] The permanent magnet synchronous motor is a permanent magnet motor in which the rotor rotates synchronously with the space magnetic field, and with the development of control theory, power electronic devices, permanent magnet materials and microprocessors, the drive technology of permanent magnet synchronous motors has made great progress , It is more and more widely used in industries and fields such as high-precision machining, robotics, aerospace and electric vehicles. [0003] With the expansion of the application range of permanent magnet synchronous motors, people's performance requirements for permanent magnet synchronous motor servo systems are also continuously improving, b...

AI Technical Summary

Problems solved by technology

In the prior art, when adjusting the control gain b, it is mainly adjusted by manual trial and error. Since the control gain b is constantly changing, manual trial and error is used for adjustment, and the accuracy is low. The error is large, so that the control gain b cannot be adjusted to the optimal value, and the controlled system cannot achieve the best control effect, and the anti-interference ability of the controlled system is low

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