Abstract
Multi-train intelligent formation control is a promising way to improve the traffic capacity of the railway system and cope with the increasing travel demand. This paper presents an optimal control method based on linear quadratic Gaussian (LQG) control, which makes multiple trains form a stable train formation. We formulate the issue of train formation control as an optimal trajectory tracking problem to minimize the influence of system disturbance and noise. A reference trajectory generator is designed by model predictive control (MPC) and a trajectory tracker based on LQG control is proposed, which combines linear quadratic regulator (LQR) and Kalman filter to improve the robustness of the formation system. The optimal control given by the proposed model has been verified theoretically and algorithmically. The proposed model shows good control effects and stable train convoy is realized during the formation process.
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