飞机风扰响应特性的模拟与评定方法

Aimed at economic and safety problems of investigating response characteristics of aircraft under wind disturbance by flight test, this paper presents a method of stimulating aircraft by designing input command of control surface in a calm atmosphere, to make it simulate motion response under wind disturbance and then complete the evaluation of aircraft characteristics under wind disturbance. Taking a certain aircraft as an example, stimulation command signals were designed based on PID control method. Response characteristics of aircraft that encountered vertical gust and cross wind were simulated, and the stability of aircraft was evaluated based on time-domain peak value. The stability characteristics, based on response data under wind disturbance, were compared and validated by adoption of low-order equivalent matching method. The results show that the design method of input command of control surface to simulate wind disturbance response and the evaluation method of stability characteristics are correct and reasonable. The research methods and results provide valuable reference for the evaluation of motion characteristics of aircraft by flight test.