The objective of this dissertation is to study the acceleration control performance of an active suspension system. The active suspension, one quarter of an Active Body Control (ABC) system of the Mercedes-Benz, responds vertically when the tire rolls on different road profiles in different speeds. First, the mathematical model of the active suspension system was built. The simulation program of this model was written by using MATLAB/Simulink software package. Then several experiments were conducted on the test rig in the Lab and the model was verified. Three controllers were put into the active control system separately to improve the acceleration performance of the active suspension system. These three controllers used Optimal-PID, LQR, and Fuzzy-Sliding mode control rules. The accelerations of the active suspension system by using these three controllers were simulated and measured under different road profiles in different speeds. At last, the acceleration performances of the active suspension system by using different controllers were compared.