Abstract
In this paper, a new adaptive sliding mode controller using an enhanced disturbance observer is proposed for active suspension. For acquiring the knowledge of the states, the use of sensors is avoided to reduce the designing cost. Instead of it, an ensemble Kalman filter is used for estimating the states. Chattering in the traditional sliding mode control method is minimized by introducing a continuous term in switching function. An enhanced nonlinear disturbance observer is designed to ensure the robustness of the proposed controller. Through rigorous analysis, the stability is proved using the Lyapunov method. To demonstrate the efficiency of the proposed controller, it is subjected to different road profiles in simulation and experimental setups.
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Abbreviations
- SMD:
-
Sprung mass displacement
- SMV:
-
Sprung mass velocity
- SMA:
-
Sprung mass acceleration
- UMD:
-
Unsprung mass displacement
- UMV:
-
Unsprung mass velocity
- RSD:
-
Relative suspension deflection
- RTD:
-
Relative tyre force
- SMC:
-
Sliding mode control
- ENKF:
-
Ensemble Kalman filter
- ENDO:
-
Enhanced nonlinear disturbance observer
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Meetei, L.V., Das, D.K. Enhanced nonlinear disturbance observer based sliding mode control design for a fully active suspension system. Int. J. Dynam. Control 9, 971–984 (2021). https://doi.org/10.1007/s40435-020-00682-3
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DOI: https://doi.org/10.1007/s40435-020-00682-3