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我国自行研制的第一架变稳定性飞机(代号为BW-1),按照试飞大纲要求,已于1989年9月21日在飞行试验研究院完成全部验证试飞科目,总共试飞43架次。其中人感系统试飞10架次,全系统闭环试飞24架次。闭环试飞内容包括模拟JJ-6原型机特性试飞;变短周期频率和阻尼试飞;变系统纯延时试飞;变人感系统频带试飞;变配平速度试飞以及变控制模态(响应反馈、俯仰速率跟随和法向加速度跟随等)试飞等。变稳控制系统接通达200多次,飞机在驾驶员评定等级2～9级范围内进行了全面试飞。整个试飞过程中,系统稳定、可靠,特别是闭环试飞基本上未出现任何故障,所有转换无一失效。
China’s first self-developed stability-changing aircraft (codenamed BW-1) has completed all verified flight tests at Flight Testing Institute on September 21, 1989, for a total test flight of 43 sorties. Among them, 10 were system-tested and 24 were system-wide closed-loop tests. The closed-loop flight test includes simulating the JJ-6 prototype flight test, shortening the cycle frequency and damping the test flight, changing the system’s pure delay flight test, changing the people’s system frequency band flight test, changing the flat speed test and changing the control mode (response feedback, pitch rate Follow and normal acceleration, etc.) test flight. Stabilization control system connected to more than 200 times, the aircraft in the pilot rating level 2 to 9 within the scope of a full test flight. During the entire flight test, the system is stable and reliable. In particular, there is basically no failure in the closed-loop test flight, and all the conversions have no failure.