卡尔曼滤波函数源代码，使用于受白噪声干扰比较大的数据，已经在硬件平台上测试（MCU使用的是STM32F103，对加速度计进行滤波）-Kalman filter function source code, for use in the white noise by relatively large data, has been tested on the hardware platform (MCU using STM32F103, accelerometer filtering)