Robust LPV-H control for active steering of tram with independently rotating wheels

Author:

Yang Zhe1ORCID,Lu Zhenggang2,Sun Xiaojie1,Zou Jinbai1,Wan Heng1,Yang Minglai1,Zhang Haigang1ORCID

Affiliation:

1. School of Railway Transportation, Shanghai Institute of Technology, Shanghai, China

2. Institute of Railway and Urban Rail Transit, Tongji University, Shanghai, China

Abstract

A new methodology is proposed in this study for active steering of a tram with independently rotating wheels (IRWs). This methodology has been developed specifically to improve the tram’s steering capability and to reduce wheel-rail wear. The tram is represented by a complex dynamic model with a diverse range of operating conditions, and traditional active steering methods cannot ensure that the tram can remain well-controlled throughout the entire range of operating conditions. The linear parameter-varying (LPV)- H control method proposed in this paper uses variable parameter theory to represent the nonlinearity, the parameter uncertainty, and the external force changes in the IRW. The LPV- H steering controller can not only ensure the robustness of the uncertain system, but also can balance the complexity and the performance of the controller. This allows the tram to offer good steering performance under various running conditions. The simulation results presented in this research show that application of the proposed control method improves the running performance of the tram and reduces the wheel-rail wear significantly on both straight and curved tracks when compared with the passive case.

Publisher

SAGE Publications

Subject

Mechanical Engineering

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