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Development and Control of a Prototype Hydraulic Active Suspension System for Road Vehicles

This paper describes a prototype Hydraulic Active Suspension System for Road Vehicles, with an objective to analyse the feasibility and effectiveness of the proposed approach. The physical system, which models a quarter-car suspension, consists of a wheel, coil springs, a Hydraulic Actuator for active damping, position, and velocity sensors, and an Direct Current (dc) motor for simulating road disturbance input signal. Here, Compared to the pneumatic actuator, hydraulic actuator has been considered as one of the most viable choices for an active suspension due to their high power-to-weight ratio and low cost. MATLAB Simulink environment (MathWorks, Inc., USA) was employed to validate the results. The results show considerable improvement in ride comfort over the conventional passive system. The details of the design construction, modeling, analysis, computer simulation, and experimental results are presented. Keywords—Active Suspension, Ride comfort, Hydraulic actuator, Vehicle Vibration Analysis, FFT Analyser, MATLAB SIMULINK Modelling.