【摘要】 为了提高大型光电跟踪设备和惯性导航设备自主定向的性能,根据动调陀螺的工作原理,设计了一种多位置捷联寻北仪。针对多位置捷联寻北系统的数学模型,采用改进的最小二乘拟合算法,对正弦曲线进行参数估计,解算出北向方位角。寻北仪主要由精密位置转台及转位控制系统、惯性测量系统、温度控制系统、数据采集与处理系统及其它配套部件组成。综合考虑寻北时间和寻北精度两个技术指标,进行了时间模式和精度模式的研究和实验。在时间模式下,当寻北精度为35.4″时,寻北时间仅为4.5 min;在精度模式下,当寻北时间为9 min时,寻北精度可达到23.9″。这两项指标均高于国内同类产品。更多还原

【Abstract】 In order to improve the independent orientation performance of large-scale electro-optic tracking equipment and inertial equipment,a kind of multi-position strap-down north-seeking instrument was designed based on the north-seeking work principle of the dynamically tuned gyro.According to the mathematical model of the multi-position strap-down system,it adopted the evolutional least squares fitting algorithm to estimate parameters of sine curve and resolve the azimuth angle of north.North-seeking installation is mainly composed by the precise position turn-plate and the indexing control system,the inertial measurement system,the temperature control system,the data acquisition and processing system,and other necessary parts.Considering the two technical indices of north-seeking time and north-seeking precision,the time mode and the precision mode are engaged in research and experiment.The north-seeking time is only 4.5 min when the north-seeking precision is 35.4″ in the time mode,and the north-seeking precision can reach 23.9″ when the north-seeking time is 9 min in the precision mode.These performance are excellent in internal same production.更多还原