Abstract: Traditional road simulation algorithm is based on the estimation of the FRF matrix of the system and through repeated iteration in frequency domain the real response approximates to the expect response. Road simulation test system is in nature an automatic control and tracking system. A time-domain road simulation algorithm，minimum variance self-tuning controller method，is presented and developed. The algorithm is realized on a personal computer. An experiment on a vibration structure is carried out to validate the correctness and practicability of the method.

Key words: Adaptive control Minimum variance, Iteration, Road simulation, Vehicle