在Arduino IDE编译环境下，用四元数法进行姿态解算。四元数法具有计算量小的优点，相比欧拉角法，省去了姿态转换矩阵的计算。(In the Arduino IDE compiler environment, four element method is used to solve the pose problem. The four element method has the advantage of small computation. Compared with Euler angle method, the calculation of attitude transformation matrix is omitted.)