Discrete time optimal control method and device for magnetic levitation system

Abstract

The invention discloses a discrete time optimal control method and device for a magnetic levitation system. The discrete time optimal control method comprises the steps of S100, determining a boundarycurve and a control variable linear variation region based on a generalized standard series discrete second-order nonlinear control system, and thus constructing control variable selection rules; S200, building a single-point model of the magnetic levitation system, transforming the single-point model into a standard series second-order nonlinear control system, and constructing a discrete time optimal controller of the magnetic levitation system by combining the control variable selection rules; and S300, acquiring the state of the magnetic levitation system, and enabling the system to achieve an expected system state through the discrete time optimal controller of the magnetic levitation system. The discrete time optimal control method facilitates implementation of a project, and can switch the selection of different control variables according to different positions of the system state, thereby enabling the magnetic levitation system to still realize normal stable levitation when there is internal parameter perturbation, external disturbance and internal disturbance, and having a high robust anti-interference ability.

Description

technical field [0001] The invention relates to the field of magnetic suspension control, in particular to a discrete-time optimal control method and device for a magnetic suspension system. Background technique [0002] Electromagnetic maglev train is a new type of vehicle that relies on electromagnetic attraction to suspend the car body on the track, and uses linear motor traction to replace the rotary transmission of wheel-rail train. With many advantages such as strong slope ability and small turning radius, it has attracted more and more attention and support from people inside and outside the industry. The levitation control system of the maglev train is the core system for the safe and stable levitation of the train, so it is very necessary to study the levitation control of the maglev train. [0003] At present, there are many studies on the levitation control algorithm of maglev trains. There is an accurate feedback linearization control based on the nonlinear mag...

AI Technical Summary

Problems solved by technology

It can be seen that when the suspension point passes through the track, if no targeted control method is adopted, the suspension gap will fluctuate greatly and even cause the suspension system to be unstable.

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