Online Self-compensation for Enhanced the Scale Factor Stability of a Micromachined Gyroscope
In this paper, an online self-compensation control scheme for micromachined gyroscope has been presented to eliminate the scale factor drift due to temperature influence. Firstly, the error sources of scale factor have been analyzed. According the analysis results, a novel control scheme which contains three loops has been proposed: a phaselocked loop of driving mode is to drive the proof mass oscillation in its resonant frequency, an AGC loop of driving mode is to keep a constant value of the drive amplitude, an additional scale factor error online detection and cancellation loop is to keep the scale factor stable. A digital hardware prototype has been implemented to perform the precision loop control and self-compensation loop. Scale factor of the gyroscope has been measured in a temperaturecontrolled turntable. Experiment results show that the scale factor drift is -3.5% to 5.2% over the temperature range of -45 ℃ to +80 ℃ without the self-compensation loop, while the scale factor drift decrease to -0.009% to 0.15% after the selfcompensation loop is applied.
Zhou Bin Zhang Rong Chen Zhiyong
Department of Precision Instrument,Tsinghua University,Beijing,100084,China
国际会议
The 8th China International Nanoscience and Technology Symposium(2009第八届中国国际纳米科技湘潭研讨会Cinsts09)
湖南湘潭
英文
1-6
2009-10-23（万方平台首次上网日期，不代表论文的发表时间）