The invention belongs to a flight
control system fatigue test technology and relates to a load simulator of a plane booster dummy
assembly. The load simulator comprises a base, a front connector, a back connector, a middle connector and a distributing valve simulator, wherein the distributing valve simulator comprises an outer cylinder, a
piston rod, an outer cylinder connector and a
piston rod connector. According to the invention, controlling load and controlling run of a plane booster or a composite steering engine distributing valve can be simulated and provided, a requirement on a main
control system fatigue test of a whole plane under a plane control load and control displace spectrum is met, at the same time, the load simulator is fixed according to an appointed
airplane control surface position, and fatigue tests are carried out on a
control system behind the plane booster or the composite steering engine and a plane body simultaneously, so that the main control
system fatigue test of the whole plane and the plane body fatigue test can be carried out simultaneously on the same fatigue test plane, the fatigue performance of the plane main control
system is truly reflected, and the progress of the main control
system fatigue test of the whole plane is accelerated.