Abstract: This paper,by taking aircraft helm surface air dynamics simulation as example, presents the principles,procedures,results and analysis of experiments with an electrohydraulic servo force simulation system.It is a high-pass compound controlsystem with“artificial”and“movement”modes,wide frequency pass-band,andsatisfactory dynamical quality.In principle,it can exactly simulate any givenload pedigree.This method is suitable for force simulation in many respects such asstrength test and fatigue test.