Multi-rate prediction control method applied to train active suspension system

Abstract

The invention relates to a multi-rate prediction control method applied to a train active suspension system. On the basis of the active suspension system model of the high-speed train, prediction control algorithm researches based on a standard orthogonal basis function orthogonal basis function-Laguerre function are carried out. under the circumstances that a state space model of the suspension system is used as a prediction control model and basic principles like rolling optimization in prediction control are combined, a corresponding prediction control is designed for the active suspension multi-rate and time-lag-contained multi-rate system of the high-speed train by considering influence factors like uncertain track interference excitation during the train running process. According to the system model, the controller parameters can be adjusted and optimized continuously to enable the system to realize an optimum control effect, thereby optimizing the vibration active control performance during the high-speed train running process and guaranteeing operation stability and comfort during the training running.

Description

technical field [0001] The invention relates to a multi-rate predictive control method, in particular to a multi-rate predictive control method applied to a train active suspension system. Background technique [0002] At present, as the speed of the train continues to increase, the vibration of the train body also increases, which not only affects the running stability of the train, but also affects the ride comfort. The active suspension of the train includes four subsystems: external energy input system , sensor system, actuation system, and measurement feedback adjustment system, which is a typical complex multi-link and multi-variable control system. The current high-speed train has the problem of inconsistent signal acquisition rate during actual operation, so the high-speed train active suspension vibration The control system is essentially a discrete vibration control system. In the design of a complex high-speed train active suspension multivariable computer vibrati...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-rate predictive control method applied to the active suspension system of a train, which solves the difference in the frequency characteristics of the sensors and actuators of the active suspension system of the current high-speed train during actual operation, thereby causing the active suspension The problem of poor control performance of the system

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