Vibratory gyroscope response parameters improving by the use of smooth noise differentiator in the rate controller

All digital vibratory gyros as a rule use proportional-integral controllers in all of four control circuits of the rate gyros. It is because high sampling rate generates wideband noise and application of differentiator results in crucial reduction of signal-to-noise ratio. This paper considers application of proportional-integral-differential controller with smooth noise differentiator based on sliding mode technique to improve step response parameters of the rate control circuit of all digital vibratory gyros. Rise time, overshoot and settling time improvements are shown without decreasing signal-to-noise ratio in the output signal under high noisy input signal. Response process under shock in rate channel is also analyzed.