Multi-point Co-ordination Of The Helicopter Rotor Load Control Method

In the helicopter's half-practicality simulation laboratory, load simulator is an important equipment to simulate the aerodynamic load acting on the airscrew while flying. It offers the helicopter performance test data and credible test information for the application of new technology. With the development of national defense industry and the need of new weapon system, the demand of such kind of servo system is greater and greater, and its performance requirement is becoming higher and higher.In this thesis, the aerodynamic load simulation of one type of helicopter airscrew is studied, and the system's structure and its mathematic model are analyzed. The main technology issues are deeply researched, such as the analysis and adjustment of the system, the analysis and restraint of the redundant force, and the harmony control of the multi-channel phase.First, the structure of the helicopter airscrew loading system is introduced. Then, the mathematic model of the single channel loading system is proposed, based on which its dynamic performance is analyzed. Combining the mechanism of disturbance occurrence and its mathematic expression, the factors influencing redundant force are studied and mathematic proof is proposed that position disturbance is strong disturbance to loading force. Finally, the feed-forward method is adopted to compensate the redundant force.The control law is theoretically studied in the thesis, and the classical feed-forward control and Artificial Neural Network are respectively adopted to implement the control system. The simulation results of the different control law are compared, and the merits and flaws of the different control laws in this system are analyzed.