Design And Implement Of Digital Rebalance Loop Of DTG

Gyroscope is a significant sense organ, and it sense angular velocity of vehicle. Dynamically tuned gyroscope(DTG) is used widely nowadays. DTG and the rebalance loop compose of sensor of angular in system of north-seeking, so it is important to research the rebalance loop.With the North-seeking usage range expanded and it function demanded, the shortcoming that the error is big in temperature and nonlinearity of simulating rebalance loop is demonstrated out gradually. The simulating rebalance loop is digitized for having the higher dynamic quality, static quality and anti-interference. The main content of this dissertation are as follows:1 .The control matrix and output matrix are reached for studying the coupling condition of the DTG using the decoupling method of diagonal matrix. Compared the simulating rebalance loop and the digital rebalance loop, the mathematic model of the digital rebalance loop is built. In order to improve the characteristic of dynamic response, the dead-beat control is added in system.2. The 32-bit high-performance SOPC digital controller as well as its outer-ring hardware and communication interface circuit is designed.3. Combining with the design theory of digital rebalance loop, the circuit including the signal amplification, appraise demodulation and filtering is designed according to restrain condition as wobble of endbrain of rotor, sampling frequency, quantization error, and choosing and distribute of loop gain, when design the rebalance loop.4.The system software is designed after the hardware platform is completed, and then simulate the function of the designed system. At the last, it be proved that the designed digital rebalance loop can satisfied fact request based on analyzing the experiment data of North-seeking system.