陀螺加速度计高速闭环动态测角系统设计  

Design of high-speed closed-loop dynamic angular measuring system for PIGA

作　　者：严小军[1] 王小辉[1] 赵晓萍[1] 徐长智[1] 

机构地区：[1]北京航天控制仪器研究所,北京100039

出　　处：《中国惯性技术学报》2007年第6期747-751,共5页Journal of Chinese Inertial Technology

基　　金：国防科技重点预研项目(51309020101)

摘　　要：从运载火箭惯性导航系统的核心仪表-陀螺加速度计对测角系统的技术要求出发,设计一种新型的陀螺加速度计高速闭环动态测角系统。它选择变磁阻多级旋转变压器进行角位置测量,并采用两相绕组激磁、一相绕组输出的脉冲调宽型鉴幅的运行方式;在分析其工作原理的基础上,从放大器、控制器、数字函数发生器、输出接口四个方面给出了测角系统的具体设计方法,最后进行了误差测试与跟踪转速测试验证。实测结果表明,采用传感器误差为1.5′的测角系统,分辨率为0.84375′,综合误差约为2.5′,最大跟踪转速为538(°)/s。该系统满足使用要求,设计方案有效可行。The technical requirements of angular measuring system of Pendulous Integrating Gyro Accelerometer （PIGA）, a kernel instrument used in inertial navigation system of launch vehicle were discussed. Then a high-speed closed-loop dynamic angular measuring system was designed to measure the output of PIGA. The system uses Vernier Resolver to measure angular, which works under the bi-phase excitation, single phase output and Pulse-Width-Modulation amplitude discrimination mode. The operation principle of the system was introduced particularly and the design method from the aspects of amplifier, controller, digital sine-cosine function generator and output interface was put forward. Finally, the testing of system error and tracking-speed was carried out. The experiments indicate that the angular measuring system has the resolution of 0.843 75＇, the system error of 2.5＇ and the highest tracking-speed of 538 （°）/s, which uses the angular sensor of 1.5＇ error. The angular measuring system meets the requirements of PIGA angular measuring system, and the designing is right and feasible.

关 键 词：陀螺加速度计 测角系统 高速测量 闭环 鉴幅型 

分 类 号：U666.1[交通运输工程—船舶及航道工程]