Rigidity-variable steering engine simulated loading device

The invention relates to a simulated actuator loading device for the control system in a flight vehicle, specifically a variable-rigidity steering gear simulated loading device. Based on the load of steering gear of the flight vehicle and parameters concerning altitude and flying speed of the flight vehicle, the invention realizes the passive load instead of active load, that is, simulates the aerodynamic forces on the steering gear upon different altitude and flying speed of the flight vehicle by changing the operating length of the spring sheet, thereby efficiently eliminating the excessiveforce produced during the steering gear servo loading simulation of the prior art. The invention can increase the accuracy of simulating control system of flight vehicle. Additionally, the device hascountertorque loading capacity by using a special countertorque loading system.