Suspension is the integral part of vehicles body. Its main purpose is to reduce the vertical acceleration transferred from rough road conditions to passenger seat, so in returns offering better ride comfort. Passive suspension systems have been utilized for decades. In Passive suspension system, spring absorbs all the energy and the damper then dissipates this energy in the form of heat. However, the passive suspension system could not meet the conflicting requirements among the ride comfort and the road holding. The parameters of these kinds of suspension are in general fixed and they cannot...