Construction method of radial magnetic bearing improved anti-disturbance controller

Abstract

The invention discloses a construction method of a radial magnetic bearing improved anti-disturbance controller in the field of mechanical machine tool control equipment. A magnetic bearing system with control current as input and actual displacement as output is constructed, a feedforward controller is composed of an integral PI control module, a random forest weight module and an amplitude limiting module, a torque PI module is connected to a linear controller and an energy controller, a disturbance observer is connected to an optimal controller in series, the linear controller is connectedto the energy controller in series, and the optimal controller, the feedforward controller and the linear controller are connected in parallel to form the improved anti-disturbance controller. The optimal controller can effectively improve the transient response characteristics, the feedforward controller based on the random forest algorithm is more rapid and accurate to obtain the global optimumparameters, the linear controller can be used for linearizing of a nonlinear system, the structure of the controller is simplified, and the improved anti-disturbance controller formed by combining thethree components has stronger anti-interference robustness and dynamic static response performance.

Description

technical field [0001] The invention belongs to the technical field of mechanical machine tool control equipment, in particular to a construction method for a radial magnetic bearing anti-disturbance controller of a machine tool spindle, and is suitable for high-performance anti-interference control of radial magnetic bearings in the field of machine tool equipment. Background technique [0002] The machine tool is the processing machine of the equipment manufacturing industry, and also the key equipment for processing and manufacturing. Whether it is metal cutting or forming process, it needs to rely on the machine tool to realize. The manufacturing level is reflected in the processing complexity, precision, efficiency and flexibility of the machine tool. At present, the machine tool industry is divided into eight sub-sectors, including metal cutting machine tools, foundry machinery, metal forming machine tools, woodworking machinery, machine tool accessories, measuring tool...

AI Technical Summary

Problems solved by technology

The PID control method commonly used at present is difficult to apply to the radial magnetic bearing of the machine tool spindle. The high requirements for the operation of the machine tool spindle have brought about time-varying parameters of the magnetic bearing system and various random disturbances.

Therefore, in order to fundamentally solve the problem of poor control effect of the traditional control method of the radial magnetic bearing of the machine tool spindle, at the same time ensure that the control performance indicators of the controlled system reach the best state, such as dynamic response speed, steady-state error, resistance Disturbance ability, etc., need to use new control method

In the Chinese patent application number 201610553116.7, titled "A Construction Method for Axial Magnetic Bearing Anti-Interference Controller for Flywheel Batteries", the disturbance parameters of the dynamic observer are used to improve the dynamic and static control performance of the overall controller, but the controller The control object is only suitable for flywheel batteries, and does not consider energy consumption

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