【作者】 齐轶楠； 赵辉； 赵万良； 蔡雄；

【Author】 QI Yi-nan;ZHAO Hui;ZHAO Wan-liang;CAI Xiong;Shanghai Jiao Tong University;Shanghai Institute of Spaceflight Control Technology;

【机构】 上海交通大学； 上海航天控制技术研究所；

【摘要】 针对半球谐振陀螺（HRG）具有低漂移、高测量精度、长寿命的特点,而传统的模数转换电路已经不能满足精度及使用寿命的要求,本文开展了基于电压频率转换方案的高精度模数转换技术研究。针对系统的指标分析,通过建立电压频率转换电路的数学模型,研究影响电压频率转换精度的误差源,进而对电路设计提出技术要求。电路实测结果表明,该电压频率转换电路零偏稳定性≤0.002°/h,测量绝对误差≤1×10^-5°/s,取得了预期的研究效果。更多还原

【Abstract】 As the hemispherical resonator gyro features in low drift,high measuring accuracy and long service life and the traditional analog-digital switching circuit cannot meet the requirements of accuracy and service life,the paper conducts the high-precision analog-digital conversion technology research based on the voltage frequency conversion scheme.The error source influencing the voltage frequency conversion accuracy is researched based on the indicator analysis of the system so as to propose technical requirements for the circuit design.The circuit actual measure results show the zero-bias stability of the voltage frequency conversion circuit is ≤0.002°/h and the absolute measurement error is ≤1×10^-5 °/s。更多还原