ning, yunkun, liangju li, guoru zhao, Yingnan Ma, Xing Gao, and Zongzhen Jin. 2015. “A Quaternion-Based Attitude Estimate System Based on a Low Power Consumption Inertial Measurement Unit”. EAI Endorsed Transactions on Energy Web 3 (9):e5. https://doi.org/10.4108/eai.14-10-2015.2261661.