Maglev system suspension control method

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...

AI Technical Summary

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 changes, the system performance will change. Poor, it will make the system unstable in severe cases

These methods can theoretically solve the above-mentioned problems about the PID control method, but they all have a common defect: it is not easy to realize in the magnetic levitation system

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