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三轴机械模拟伺服转台是对卫星姿态控制系统的运行性能进行半物理仿真试验的重要设备。由于对模拟系统的分辨率、重复性、轴系漂移率、非线性、低速性能等要求很高,检测元件的精度将直接影响转台的精度指标。目前作为位置检测元件有很多种,如感应同步器等。我们采用的是有绝对零位的增量式光栅角位移传感器,位置速度闭环回路,实现高精度位置跟踪。位置检测元件在工作中能提供一个绝对零位即具有零位信号的记忆功能以满足停电停机时寻找基准点。
Three-axis mechanical servo servo turntable is an important equipment for performing semi-physical simulation test on the performance of satellite attitude control system. Due to the high resolution, repeatability, drift rate, non-linearity and low speed performance of the simulation system, the accuracy of the detection components will directly affect the accuracy of the turntable. At present, there are many kinds of position detection components, such as induction synchronizers. We are using an incremental incremental grating angular displacement sensor with zero position, closed loop position velocity loop, to achieve high-precision position tracking. Position detection components in the work can provide an absolute zero that has a zero signal memory function to meet the power failure to find the reference point when the machine downtime.