这架试验机上安装有我国第一套数字式气动变稳飞行控制系统，这类飞机上不允许地面共振现象存在。
It is not allowed that construction resonance phenomena appear in the aircraft which is equipped with digital variable stability system.
这是一个三轴自动飞行控制系统，它由模拟式的控制增稳系统和数字式自动驾驶仪组成。
It is a automatic flight control system for three axes, and consists of analog control augmentation system and digital autopilot.
美国宇航局说，对飞行控制系统：“这三个数字式飞行控制计算机每有一个模拟备份。”
Says NASA about the flight control system: "Each of the three digital flight control computers had an analog backup."
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