Abstract: In order to reduce the measuring error caused by the rate bias mechanism,a rate bias laser gyro will not only require the rotate back time of laser gyro platform as short as possible,but also call for the angle rate of rate bias platform very steady(about 10 -4 stability). This paper applies fuzzy PID adaptive control technology to design and accomplish the rate control system.The results show that the angle rate stability of rate bias platform is superior to 3.12×10 -4 ; the rotate back of platform is very fast(the whole time from -60°/s to 60°/s is about 14ms),and the rate overshoot in this course is very small. This control system is applied successfully in a practical system.

Key words: fuzzy co nt ro l, adaptive contr ol, laser g yr o, r ate bias