Differential geometric decoupling control-based bearing-less asynchronous motor radial force suspension control system

Abstract

The invention discloses a differential geometric decoupling control-based bearing-less asynchronous motor radial force suspension control system. The system comprises a differential geometric controller and a compound controlled object, wherein the differential geometric controller comprises a linear closed loop controller and an accurate linear decoupling system; the output of the compound controlled object is fed back to the input of the linear closed loop controller; the output of the linear closed loop controller is connected with the input of the accurate linear decoupling system; the output of the accurate linear decoupling system is connected with the input of the compound controlled object; and through the differential geometric decoupling controller, a nonlinear, multi-variable and strong-coupling bearing-less asynchronous motor radial force suspension subsystem is decoupled into two displacement second-order integral linear subsystems, so that the accurate linearization of the nonlinear systems is realized and the complicated nonlinear problems are converted into linear problems for solution, thereby greatly decreasing the control difficulty.

Description

technical field [0001] The invention belongs to the technical field of electric transmission decoupling control, in particular to a bearingless asynchronous motor radial force suspension control system based on differential geometry decoupling control. Background technique [0002] Bearingless asynchronous motor is a technological innovation in the field of motors. It not only has the characteristics of no friction, no wear, no lubrication, long life, high speed and ultra-high speed of bearingless motors, but also has the advantages of simple structure, firmness and low cost of asynchronous motors. It is one of the most promising bearingless motors due to the advantages of low, uniform air gap, stable cogging torque and good field-weakening speed regulation. The application of the motor in the fields of flywheel energy storage, chemical engineering, transportation and aerospace is of special significance and irreplaceable. [0003] The bearingless asynchronous motor system ...

AI Technical Summary

Problems solved by technology

The above-mentioned methods all have a big defect: when the three inverse system methods partially or completely decouple the bearingless asynchronous motor, they all rely on accurate mathematical models, and in actual working conditions, the accuracy of the system The model is difficult to obtain, which makes it difficult to guarantee the accuracy of the decoupled control method

In addition, there are more or less problems such as large amount of calculation and slow control speed when using the above methods.

Images