Research on Stability Control Algorithm of Distributed Drive Bus under High-Speed Conditions

Abstract

Aiming at the instability problem of a four-wheel independent drive electric bus under high-speed conditions, this paper first designs a vehicle yaw stability controller based on a linear two-degree-of-freedom model and a linear quadratic programming (LQR) algorithm. A vehicle roll stability controller is then designed based on a linear three-degree-of-freedom model and a model predictive control algorithm (MPC). Moreover, a coordinated control rule based on the lateral load transfer rate (LTR) is designed for the coupled problem of yaw and roll dynamics. Finally, the effectiveness of the proposed control algorithm is verified by simulation. The obtained results show that when the vehicle is running at a high speed of 90 km/h, the stability control algorithm can control the yaw rate tracking error within 0.05 rad/s. In addition, the control algorithm can reduce the maximum amplitude of the side slip angle, the maximum value of the roll angle, the maximum value of the roll angular velocity, and the amplitude of the lateral acceleration by more than 96%, 81.1%, 65.0%, and 11.1%, respectively.

Active suspension LQR control based on modified differential evolutionary algorithm optimization

“…Using MATLAB/Simulink software to build an automobile 1/4 active suspension model and apply LQR control strategy for simulation experiments [24]. The passive suspension, the traditional LQR control of the suspension and the improved differential evolutionary algorithm optimized active suspension LQR control are simulated given the same road inputs [25]. The values of the three performance indicators obtained from the simulation to evaluate the suspension are output.…”

Research on Stability Control of Distributed Drive Vehicle with Four-Wheel Steering

“…With the rapid advancement of energy storage units and motor power density, significant improvements have been made in the development of electric vehicles. This has brought to light the environmental and energy-related disadvantages of fuel vehicles [1,2]. As drive-by-wire technology continues to mature, there is a growing focus on distributed drive and four-wheel steering technology [3].…”