A limiting performance based optimization technique is presented for the optimum design of a single degree-of-freedom vehicle suspension system. Limiting performance is the system and input dependent absolute optimal response characteristic. Control force concept is used to optimize damping force of a suspension system. The limiting performance of the considering system for a given input excitation is computed with nonlinear programming technique such as gradient projection method. Then it is tried to have to an optimal design value from the limiting performance by curve fitting technique. In order to save compationn fourier series is used to represent the control force. Ride comfort and rattle space are used as an objective function, and optimized under passive damping constraint.
It is found that this method can be a good technique to evaluate design qualitatively. But in order to get practical design values with this method, further parameter identification method should be developed.
