An Optimal Control Strategy for a Passenger Car Active Suspension and Experimental Validation through a Quarter Car Test Rig 2019-01-0442
The passive suspension system owing to the fixed values of suspension parameters results in limited performance for varying road profiles. In contrast, an active suspension system provides a force generator in tandem with the conventional passive suspension system components of springs and dampers resulting in a greater flexibility in dealing with complex road profiles. The efficacy of the active suspension system lies in the design of the control structure involved. The control structure is expected to overcome the challenges posed by the requirements of an active suspension system.
The research paper includes a comprehensive analysis of PI, PID, LQR and Fuzzy Logic controllers for implementation in active suspension design. The multi objective requirements of an automotive suspension system which include ride comfort and suspension deflection are to be catered by the proposed control logic. The proposed controllers are compared with the simulation data and experimental data obtained from a quarter car test rig laboratory setup. Simulation is carried over through Simulink modelling software and validated with the experimental data obtained from Quanser active suspension test rig. The performance of the active suspension with the proposed controllers is compared with conventional passive suspension for similar road profile conditions.
A J D Nanthakumar, Mayank Dhyani, Nashat Maoud