摘要
在惯导测试转台中 ,测角系统是影响其精度的一个最主要因素 .而目前常用的鉴相测角系统只能保证其静态精度 .当测角线路中存在参数动态变化以及转台运动时 ,测角系统精度将有很大损失 ,因而难以保证测试转台有较高的动态精度 .为此详细分析了双相激磁鉴相型测角系统的动态误差来源及表现形式 ,提出了一种闭环自动补偿方案 ,并给出了其具体实现电路 ;经过分析和实验 ,证明该方案不仅通用效抑制测角线路参数变化的影响 ,而且可以保证转台运动中相位自动完全补偿 ,从而不仅能进一步提高测角系统静态精度 ,而肫可使其动态精度达到 1″以内 .
Angle measurement system is one of the most important factors having influence on the accuracy of inertial navigation test bench. But now only the static accuracy of the common angle measurement system based on phase-detecting can be obtained. When dynamic parameters vary in angle measurement circuit and the turntable is operating, the accuracy of the angle measurement system will have a high loss. So no higher dynamic accuracy is obtained for the test bench with dynamic error source. Expression of high accuracy angle measurement systems based on double-phase exciting and phase-detecting is analyzed in detail. A closed-loop system for automatic compensation of error is presented and its implementation circuit is also given. With the analysis and experiment, the system can not only restrain effectively the influence of the change of parameters in angle measurement circuit, but can also compensate completely and automatically the phase during the turntable operation. Then the static accuracy can be higher and dynamic accuracy can be obtained within 1″.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2001年第5期628-631,共4页
Journal of Harbin Institute of Technology
