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Intelligent double-integral sliding mode control method and device for five-degree-of-freedom magnetic bearing

A degree of freedom, double integral technology, applied in the direction of bearings, shafts and bearings, mechanical equipment, etc., can solve the problem of unsatisfactory stability, and achieve the effect of reducing chattering, strong stability, and improving control accuracy

Active Publication Date: 2020-01-17
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

The integral sliding mode control method was applied to active magnetic suspension bearings earlier, but this method is not particularly ideal in terms of stability

Method used

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  • Intelligent double-integral sliding mode control method and device for five-degree-of-freedom magnetic bearing
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  • Intelligent double-integral sliding mode control method and device for five-degree-of-freedom magnetic bearing

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Embodiment Construction

[0022] The specific embodiments of the present invention will be described below to further illustrate the starting point and corresponding technical solutions of the present invention.

[0023] figure 1 It is a flow chart of an intelligent dual-integral sliding mode control method for a five-degree-of-freedom active magnetic suspension bearing provided by an embodiment of the present invention, and the method includes the following steps:

[0024] Step 101, establish a mathematical model according to the five-degree-of-freedom active magnetic suspension bearing system, and obtain a dynamic model of the five-degree-of-freedom active magnetic suspension bearing system.

[0025] For a rotor with rigid and symmetrical body characteristics, the relationship between the center of gravity CG of the rotor and the five-degree-of-freedom active magnetic suspension bearing is as follows: figure 2 , where m is the mass of the rotor, g is the gravitational constant, and x c 、y c and z...

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Abstract

The invention discloses an intelligent double-integral sliding mode control method and device for a five-degree-of-freedom active magnetic bearing. The method comprises the steps that a dynamic modelof a five-degree-of-freedom active magnetic bearing system is calculated, the dynamic model of the five-degree-of-freedom active magnetic bearing system is decoupled into five independent subsystems by using a decentralized controller, the first output of the five subsystems is calculated by using an improved proportional-integral-differential neural network MPIDNN observer, the second output of the five subsystems is calculated by using an intelligent double-integral sliding mode controller, and the position of a rotor of the five-degree-of-freedom active magnetic bearing is controlled by utilizing the second output of the five subsystems. The method has the advantages that buffeting of the active magnetic bearing system can be relieved, the control precision is improved, and the stability is higher.

Description

technical field [0001] The invention relates to the field of magnetic suspension bearing control, in particular to an intelligent double-integral sliding mode control method and equipment for a five-degree-of-freedom active magnetic suspension bearing. Background technique [0002] Active magnetic bearing (active magnetic bearing) is a new type of bearing that can stably suspend the rotor at a predetermined position and support the rotation of the rotor through controlled electromagnetic force. Based on the characteristics of non-contact and frictionless, active magnetic bearings have more advantages than traditional bearings, such as longer life, lower rotational friction loss, higher speed and no need for lubrication. [0003] The control performance of active magnetic suspension bearing is an important aspect of magnetic suspension bearing research, and the quality of control performance determines the quality of active magnetic suspension bearing. Since the active magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04
CPCF16C32/0451F16C32/0489
Inventor 禄盛史军辉赵洋朴昌浩陈翔
Owner CHONGQING UNIV OF POSTS & TELECOMM
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