Simulation And Experimental Investigation On Semi Active Suspension System With Skyhook, Groundhook, And Hybrid Controllers

Muhammad Luqman Hakim, Abd Rahman (2009) Simulation And Experimental Investigation On Semi Active Suspension System With Skyhook, Groundhook, And Hybrid Controllers. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Semi active suspension change their damping force in real time by simply changing the damping coefficient according to a control policy. In this study, a number of semi-active control algorithms namely skyhook, groundhook and hybrid skyhookgroundhook controllers will be investigate through simulation and experimental method with Magneto Rheological (MR) damper. The effectiveness of these control algorithms in disturbance rejection are investigated along with their ability to consistently provide the target force in the same direction with the damper velocity to overcome the damper constraint. A full scale quarter-car test rig which consists of two units accelerometers,two units displacement transducers, one unit force sensor, semi-active suspension system which using MR damper, and 3-phase AC motor is used to simulate the sinusoidal road profile by using slider crank mechanism for road profile simulator. An (Integrated Measurement and Control) IMC device is used for controlling the MR damper and also for acquiring the experimental data. From the simulation and experimental results, hybrid skyhook-groundhook controller shows significant improvement in four performance criteria namely body acceleration, body displacement, suspension deflection, and wheel acceleration without allowing excessive wheel acceleration magnitude. The hybrid skyhook-groundhook controller is also superior to the counterparts in overcoming the damper constraint by producing the target forces consistently in the same sign with the damper velocity.

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