某歼击教练机纵向摆动问题的研究

THE RESEARCH FOR LONGITUDINAL OSCILLATIONS OF A FLIGHT TRAINER

本文从闭环控制理论出发,提出了人-机系统仿真数学模型,研究了某歼击教练机纵向摆动的实质及其解决办法。研究结果表明,该机产生的纵向摆动属于PIO(Pilot Induced Oscillation)范畴。文中同时提出了防止该机PIO的两种措施——既能防止PIO,又能改善飞行品质的最佳方案及经济性好、易改出的实用方案.

On the basis of the theory of closed-loop control, the mathematical model formulation of the man-plane system is set up in this paper. The mechanism and resolving means of this trainer' s longitudinal oscillations are also studied in this paper. The result of this research shows that these longitudinal oscillations occured in these trainers belong to PIO (Piloted-Induced Oscillation) category. Simultaneously, two means that can prevent trainer's PIO completely are suggested, the optimal means, it is can not only prevent the PIO, but also can improve trainer's flying quaility; the actual means, it is economic, easy to apply.