The sinusoidal excitation method is used in calibration of velocimeters or accelerometers.Unlike the past

the electro-hydraulic position servo system is used as experimental platform for the first time.And sinusoidal approximation method based on least-squares approach is still the core of the algorithm

this method can not only get the true sense of the instantaneous velocity signal

but also can get the optimal solution in the presence of noise.However

this method is not only applicable to traditional signal calibration of sense

but also can be extended to the solution of the problem of angular acceleration measurement of rotating shaft by linear acceleration sensor.The experimental results show that the method achieves good effect on the above two questions.