COMPARISONS OF ACTIVE, PASSIVE AND SEMI-ACTIVE SUSPENSIONS FOR GROUND VEHICLES

The comparison study of the active, semi-active and passive suspension systems has been treated in this work.; The state-of-art review has been presented in Chapter 1. The discussion included the optimization of a single-degree-of-freedom (SDOF) suspension system, its implementation and design evaluations. Different types of damping mechanism have also been discussed.; The concept of damping controllability has been introduced in Chapter 2. The eigenvalue movement due to damping parameter variations has been considered, which led to the systematic indications of damper and sensor locations to achieve the damping controllability.; The influences of different types of damping in the frequency transmissibility of both the SDOF and 2DOF systems have been studied in Chapter 3 and 4. The existence of the "wheel hop" in the 2DOF vehicle suspension system and parameters that influence it have been pointed out. Transmissibility curves have been used to compare the performances of different suspension systems both theoretically and experimentally. The development of the active damper system has been discussed in Chapter 4. The computer simulations of the motorcycle suspension system with different types of damping having also been discussed in Chapter 5.