| Hemispherical Resonator Gyro(HRG) is a comparatively new type solidrotation-sensing instrument and has a few specific feature such as highprecisionã€high reliability and longevity of service. The last part of the control circuit of hemispherical resonator gyro using simulation circuit. In the precision request more and more high today, because of the small signal processing, analog circuit is more and more difficult to meet our requirements. And the digital circuit of low power consumption, has the characteristics of integration, high stability, convenient debugging, easy to implement adaptive processing etc.This paper is to address the problem, to realize the digital control circuit of hemispherical resonator gyro. In the detailed introduction of hemispherical resonator gyro principle as well as the premise of theoretical research of control model, Focus on the hemispherical resonator gyro multi loop control model, through simulation and other technical means of control of key parameters of the system validation, index prediction, scheme selection and evaluation, and ultimately determine the optimal control system.We put forward the design thought of the whole digital control circuit, some units of analog and digital circuit design are described, and the digital control algorithm in-depth analysis, the final, complete the digital control hemisphere gyroscope prototype. Hemisphere gyroscope digital control system is mainly used for the hardware architecture of DSP+FPGA, in this scheme makes full use of the DSP floating-point arithmetic ability, FPGA parallel data acquisition and conversion speed, time synchronization performance advantage, this part as the core processing unit of the whole circuit. At the same time, high accuracy A/D, D/A, DDS and other devices coupled with the peripheral, read out the precise control and precession of hemispherical resonator gyro angle.Based on the test, test data proved the superiority of hemispherical resonator gyro digital control circuit. |
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