Maglev system suspension control method

A levitation control and magnetic levitation technology, which is applied in electric traction, electric vehicles, transportation and packaging, etc., can solve problems such as system instability, system performance deterioration, and difficulty in realizing a magnetic levitation system

Inactive Publication Date: 2009-01-21
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

But the disadvantage of this control method is that each group of weighting coefficients can only make the performance of the suspension system optimal under a certain system parameter condition. When the system parameters change, if the weighting system does not make corresponding chan

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  • Maglev system suspension control method
  • Maglev system suspension control method
  • Maglev system suspension control method

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] In order to solve the problem that the PID control method in the prior art can only ensure the optimal suspension control performance under a certain system parameter condition, but the suspension control performance will become worse when the system parameter changes, the present invention proposes a The method of changing the levitation control parameters when the system parameters change can change the levitation control parameters according to the current when the magnetic levitation system is in stable levitation, so that the performance of the levitation system remains unchanged. The i...

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Abstract

The invention relates to a suspension control method for a magnetic suspension system, which comprises the steps: adopting a current loop to accelerate the rising velocity of the current i in an electromagnetic coil; adjusting a position loop to control the suspension performance in a set range; eliminating the static error during stable suspension by controlling the integral of a suspension clearance; selecting an integral control parameter ki so as to eliminate the influence of the suspension clearance integral on suspension performance; using a suspension performance index to adjust a suspension clearance control parameter kp and a suspension clearance differential control parameter kd; determining laden variable quantity according to the variation of stable suspension current i; corresponding changes the suspension control parameters kp and kd according to the variation of suspension current i0 so as to adjust the voltage control variable u2 at the both ends of an electromagnet in the suspension process and keeping the suspension performance unchanged all the time under the condition of variable load. By using the current of the magnetic suspension system when the suspension is stable to change the suspension control parameters, the method can not only overcome the disadvantages of the ordinary PID control method, but also has the advantage of easy realization of the ordinary PID control method.

Description

【Technical field】 [0001] The invention relates to a maglev train control system, in particular to a stable levitation control method applied in the maglev system. 【Background technique】 [0002] The electromagnetic maglev train uses a levitation magnet located under the track to attract the track to provide the magnetic force required for levitation. The stable suspension of the train is realized by the suspension control unit, which provides a certain current for the suspension electromagnet, so that under a certain suspension gap, the suspension force is equal to the gravity of the train, thereby realizing the stable suspension of the train. [0003] The magnetic levitation system itself is unstable in the levitation direction, and a levitation control method is required to make the system stable. A commonly used and easy-to-implement levitation control method is the PID control method. This control method uses the levitation gap, the levitation gap differential and The w...

Claims

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Application Information

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IPC IPC(8): B60L13/06
Inventor 刘恒坤吴志添李云钢张晓张鼎陈树文
Owner NAT UNIV OF DEFENSE TECH
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