The design of attitude measurement unit based on multiple MEMS gyros

In order to effectively reduce the volume, mass and cost of the attitude measurement unit (AMU) of the satellite, as well as to ensure that the reliability of the whole system is proper, this paper presents a hardware design method of AMU based on multiple MEMS gyroscopes. Using the modular design method, the scalability of system and the interchangeability between modules are effectively improved. In order to realize the data fusion between MEMS gyroscopes, a federated Kalman Filter based on the time series model is designed. The test result on a single axis air-bearing table shows that the designed AMU works stably, and it can obtain angular rate measurement data with high accuracy.