Development of computer controlled loading system of helicopter manipulating booster

Addressing on the requests to measure the working characteristics of helicopter manipulate booster under high frequency aerodynamic load, this paper has developed a hydraulic loading system to simulate the load with large static load and sine dynamic load. The structure and operation principle of load simulator are described and analyzed, and a method to restrain the surplus force is put forward. Signal conditioning circuits of physical signals and power drive circuits of the hydra-electronic servo valves are designed to satisfy high frequency load. The computer control system of the load simulator is developed by using the real-time operating system based on Windows XP and RTX, and the control software programmed by Microsoft Visual C++ language, and the control processes are also given. The experimental results show that the developed load simulator performance indexes can meet the designed requirements.