The Research On Digital Acceleration Sensor System For O-E Theodolite

For O-E theodolite, the precision and stabilization of servo tracking systemdecide on the effect in measuring and monitoring targets. This paper studies on theacceleration measurement, signal processing and servo control technology for theservo tracking platform of O-E theodolite, Aiming at achieving the performance ofO-E servo tracking system and promoting the development of the servo trackingcontrol theory and technology.In this paper, the O-E theodolite acceleration sensor system is designed torealize a new method of measuring and sensing acceleration for O-E theodolite. Thepiezoelectric angular acceleration sensor with superior performance is adopted askey to build O-E theodolite acceleration sensor system in order to obtain theacceleration information of servo tracking system. The paper describes thecomposition and implementation of acceleration sensor system, the informationprocessing, and analyzes the measuring principle and error sources of accelerationsignal. The performance of acceleration sensor system is synthetically tested andverified. By comparison with the traditional measurement method of motioninformation, the O-E theodolite acceleration sensor system has better systemintegration and reliability, and providing better acceleration and other motioninformation.The paper studies the software filter technology of acceleration signal for O-Etheodolite. Based on analyzing the acceleration signal characteristics of O-E servotracking system, the paper studies and analyzes some filter processing technology aslow-pass filtering, statistical filtering, Kalman filtering and wavelet thresholdfiltering. After analyzing the operating environment, error source and signal characteristics of acceleration sensor system, the adaptive filtering technology isadopted to process the acceleration. The paper researches on the theory andalgorithms of adaptive filtering, and designs adaptive FIR filter based on LMSalgorithm to implement the filter processing and error compensation adaptively. Themethod can measure O-E theodolite acceleration signal adaptively, with increasingthe precision of acceleration measurement signal and promoting the research onsoftware filtering technology for motion information in O-E servo tracking system.The paper research on the compound control technology based on accelerationinformation source for O-E theodolite. The compound control can solve thecontradictory problem between steady-state precision and dynamic performance ofservo tracking system, which integrates feedforward control from input signal andtraditional close-loop error control. Simulation and experiment results show thatcomparing with the traditional servo control and delay compensation control basedon encoder information, the compound control technology in this paper can greatlyenhance both the tracking precision and dynamic performance, and have goodPracticality in O-E servo tracking system.The O-E theodolite acceleration sensor system can provide stabilize and preciseacceleration information source for monitoring the motion station and servo trackingcontrol in O-E tracking system. The compound control technology based onacceleration information source can significantly improve the ability of tracking andlocating targets for O-E theodolite, which has active effect on promoting thedevelopment of servo tracking theory and technology in O-E servo tracking system.