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The exploration of energy-efficient active suspension control strategies for high-performance vibration suppression remains a critical challenge, particularly under partial-state measurements, uncertain dynamics, and external disturbances. This article proposes an innovative predefined-time output feedback control scheme for active vehicle suspension systems that achieves superior vibration mitigation with reduced energy consumption. By employing the time-varying scaling function technique, a predetermined-time extended state observer is developed to estimate unmeasurable velocities and lumped disturbance, while a second-order predefined-time filter is designed to avoid the explosion of computational complexity. Furthermore, using the effect characterization method and the X-mechanism reference dynamics, beneficial couplings/disturbances and nonlinearities can be reserved instead of direct cancellation, which leads to significant energy conservation up to 58% compared to other methods. Then, the predefined-time output feedback control is proposed to ensure that settling time can be arbitrarily user-specified using only one parameter, which is independent of initial conditions and control gains. Comparative experiments are performed to present the effectiveness and robustness of the proposed control method.
Zhou et al. (Fri,) studied this question.