Inertia simulation device is the key testing device for vehicle braking performance test bench.Nowadays electric inertia simulation is the main research directions.This paper describes the method of controlling the electrical inertia simulation.At the same time,mechanical inertia simulation method,hydraulic inertia simulation method and electrical inertia simulation method are compared,the results show the electrical inertia simulation method is the best one.For electric inertia simulation device can not si...