加速度测量的力学解释

Mechanical Explain of Acceleration Measurement

加速度计是靠感测因惯性力引起的相对位移来测量视加速度的,不能测量真实的重力加速度。通过力学基础的角度来解释加速度计,并通过试验的方法,验证了加速度计不能测量重力加速度这一结论的正确性。

The principle of accelerometer is based on the measurement of the relative displacement that arises between the elastically suspended proof mass and the accelerometer frame subject to acceleration. Accelerometer can not measure gravitational acceleration. In the field of inertial navigation, acceleration measured by inertial instruments is also called specific force. Therefore, in the inertial frame, acceleration of the object is the vector summation of specific force and gravitational acceleration, This paper tends to explain why accelerometer can not measure the gravitational acceleration from the point of view of mechanics foundation.