两种基于互补滤波的姿态算法，对陀螺仪和加速度计进行数据融合，解算姿态。一种使用了梯度下降算法，另一种使用反馈修正和李雅普诺夫分析。-Two algorithms for attitude estimate based on complementary filtering. Data form Gyroscope and Accelerometer are fused. One is based on gradient descent algorithm while the other is ba