A Construction Method of AC Magnetic Bearing Fault-Tolerant Decoupling Controller

A technology of decoupling controller and construction method, applied in the field of magnetic levitation transmission, to achieve good application value and popularization effect

CN103490690BActive Publication Date: 2015-09-30湖南凌翔磁浮科技有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-09-30

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Abstract

The invention relates to a construction method of an alternating-current magnetic bearing fault-tolerant decoupling controller. The construction method includes the following steps of firstly, constructing a controlled composite object; secondly, constructing a support vector machine inverse model base; thirdly, selecting a support vector machine inverse model in the support vector machine inverse model base to be used as the support vector machine inverse model for the controlled composite object, enabling the inverse system function of the controlled composite object to be achieved, setting up a pseudo linear system before enabling the support vector machine inverse model base to be connected to the controlled composite object in series, and decoupling the pseudo linear system into two second-order integral type displacement linear subsystems in a linearization mode; fourthly, designing two radial position controllers for the two second-order integral type displacement linear subsystems respectively to constitute a linear closed loop controller; fifthly, enabling the linear closed loop controller and the support vector machine inverse model base to constitute the support vector machine inverse fault-tolerant decoupling controller together, and conducting fault-tolerant decoupling control on the controlled composite object.
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Description

technical field

[0001] The invention relates to a construction method of an AC magnetic bearing fault-tolerant decoupling controller, which is suitable for high-performance and high-reliability control of an AC radial active magnetic bearing system, and belongs to the technical field of special electric transmission (especially magnetic suspension transmission). Background technique

[0002] In order to adapt to the development trend of modern equipment and advanced manufacturing industry towards high efficiency, high speed, high precision, intelligence, low power consumption and green manufacturing, the magnetic bearings used in the field are required to have small size, simple structure, low power consumption and low cost. low and high reliability. AC radial active magnetic bearings are based on AC excitation. Only a single three-phase CRPWM power inverter can be used to achieve radial two-degree-of-freedom suspension control, and the three-phase CRPWM inverter technology ...

Examples

Embodiment Construction

[0021] The concrete implementation of the present invention divides following 10 steps:

[0022] 1. Connect the Clark inverter 11 and the CRPWM inverter 12 in series before the AC radial active magnetic bearing system 13 to form a compound controlled object 1, such as figure 1 shown. The compound plant 1 starts with {i x ,i y}Two control current signals are taken as input, and the radial displacement x and y of the rotor are taken as output.

[0023] 2. Based on the levitation operation principle of the AC radial active magnetic bearing, establish the mathematical model of the non-AC radial active magnetic bearing system 13, and obtain the mathematical model of the composite controlled object 1 through the Clark inverse converter 11 and the CRPWM inverter 12 model, analyze the reversibility of the mathematical model, and prove that the mathematical model is reversible, that is, there is an inverse model.

[0024] 3. Adopt a support vector machine 21 with 6 input nodes, 2 o...