关键词: 角速率, 余度, 模糊系统, 故障－阈值

Abstract:

An intellegent angular rate control for servo motor of platform in inertial navigation system(INS) with fibre optic gyro is developed. The servo control with double feedbacks of angle and angular rate is implemented by using 16 bit single chip computer 8089, in which two stage fault discrimination and one stage system reformation are implemented by the provided angular rate feedback channels with double redundancy. Fuzzy control relationship is set up to form its membership function and determine its fault discrimination threshold. It is shown in the system experiment that the intellegent control system works well, fuzzy discrimination of fault is correct , the channel switching under fault is steady, and the reformed system in which the fault is cut off works also normally.

Key words: angular velocity, redundancy, fuzzy systems, fault-thresholds