Better journey comfort and controllability of automobile are pursued via car industries with the aid of considering
using suspension system which plays a very crucial function in handling and ride comfort characteristics. This paper
presents the design of an active suspension of quarter automobile system using robust H2 optimal controller and
robust μ - synthesis controller with a second order hydraulic actuator. Parametric uncertainties have been
additionally considered to model within the system. Numerical simulation become completed to the designed
controllers. Results display that during spite of introducing uncertainties, the designed μ - synthesis controller
improves ride consolation and road protecting of the automobile while as compared to the H2 optimal controller