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.
出处
《中国惯性技术学报》
EI
CSCD
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)
关键词
陀螺加速度计
测角系统
高速测量
闭环
鉴幅型
gyro accelerometer
angular measuring system
high-speed measurement
closed-loop
amplitude discrimination mode
