Affiliations: Mechanical Engineering Department, College of
Engineering, International Islamic University Malaysia, Gombak, Kuala Lumpur,
Malaysia | Mechanical Engineering Department, College of
Engineering, Virginia Polytechnic and State University, Blacksburg, VA,
USA
Abstract: Several control policies of Q-car 2-DOF semiactive system, namely
skyhook, groundhook and hybrid controls are presented. Their ride comfort,
suspension displacement and road-holding performances are analyzed and compared
with passive system. The analysis covers both transient and steady state
responses in time domain and transmissibility response in frequency domain. The
results show that the hybrid control policy yields better comfort than a
passive suspension, without reducing the road-holding quality or increasing the
suspension displacement for typical passenger cars. The hybrid control policy
is also shown to be a better compromise between comfort, road-holding and
suspension displacement than the skyhook and groundhook control policies.
