Abstract
The multipass ele ct ro-hydraul is redundant servo systems, in what each pass drives a load synchronously at the same time, is discussed. First, the model of a single-pass system is given. Then, the performances of the redundant system and the essence of force-fight occurring among passes is analysed. At last, based on the theory of decouping, the equalization technique is set forward to solve the force-fight among passes and the opt imal design method of equalization net work is given. Simulations and experiments prove it is convenient for practical use.