The Study On Cupped Wave Gyro Digital Measure And Control Technology

Gyroscope is an important component of inertial navigation system, which has extremely important function on precision-guided weapons, aerospace and other applications. Solid wave gyroscope has a promising prospect for its advantages of low power consumption, low cost, high reliability and so on, the cupped wave gyroscope is one kind of solid wave gyroscope, Compared with the hemisphere gyroscope, which has a simple structure, low-cost processing.In this dissertation, the researches about the cupped wave gyroscope's digital control system are shown as follows:1. The structure and working principle of the cupped gyroscope are introduced, the mathematical model of the resonator is built, and the signal processing and control system are gave.2. The cupped wave gyroscope measurement and control circuit designing is described. Gyroscope's driven used closed-loop control scheme with a phase-locked loop based on the principle of frequency control and automatic gain control of the amplitude of the control theory, and the detection used a force feedback loop with the principle of detection.3. With the specific implementation process of the drive and detection, the detailed analysis and discussion are carried out. The achievement of the loop drive, based on the principle of DDS which have a high stability of the sinusoidal drive signal; analysis of the PLL-based closed-loop control of the driving principles of the mathematical model and the model identification method used to obtain the loop transfer function, the used of engineering of the whole titration to obtain the PI controller parameters ; the used of force feedback principle of gyro detection method has improved the bandwidth and detection accuracy.4.The test system is designed, the control system of the functions of each module are separately tested, The results show that the frequency control error can be achieved 10-6, error relatived amplitude control can be achieved 10-4.5. The used of the control system with the laboratory'cupped gyroscope, The result shows: the scale factor is 8.051529e-4°/s/LSB, the nonlinearity is 811 ppm, the bias stability in an hour is 4.1?/h.