Adaptive control for the nonlinear suspension systems with stochastic disturbances and unknown time delay

• Published in: Systems science & control engineering Vol. 10; no. 1; pp. 208 - 217
• Main Author: Wang, Dongmei
• Format: Journal Article
• Language: English
• Published: Macclesfield Taylor & Francis 31-12-2022; Taylor & Francis Ltd; Taylor & Francis Group
• Subjects: active suspension system; Adaptive control; backstepping technique; Dampers; Disturbances; Nonlinear control; Nonlinear systems; Nonlinearity; Open access publishing; Suspension systems; Systems science; time delay; Time lag; Traffic control
• ISSN: 2164-2583; 2164-2583
• DOI: 10.1080/21642583.2021.1949403

In this work, an adaptive control problem is investigated for the nonlinear active suspension systems (ASSs) with stochastic disturbances and time delay. Also, in the suspension system, the nonlinearity of the springs and the dampers are considered. In order to be closer to the actual system, the external random disturbances are not neglected in this paper. It is worth mentioning that unknown time-varying delay is considered in this study to facilitate the treatment of transmission time delay. Based on Lyapunov theory and backstepping technique, the presented adaptive controller is able to ensure that all the signals in close-loop system are uniformly ultimately bounded in probability. Finally, the simulation results further illustrate the effectiveness of the proposed approach.