Investigation on vibration analysis of quartz flexible accelerometer with permutation entropy

A special vibration test method of quartz flexible accelerometer is explored in this paper, in order to investigate dynamic changes with vibration frequencies. Utilizing a vibration exciter, the vibration accelerometer signals are collected, which can be applied for the permutation entropy analysis. Firstly, three parameters of permutation entropy are selected by comparative analysis to solve its parameter setting problem, then, these appropriate parameters can be determined, including embedded dimension, delay time and data length. With different vibration frequencies, statistical variations of entropies are presented. With the vibration test, the experimental results demonstrate that the complexity of accelerometer signal can be described by using the permutation entropy, and the dynamic changes in accelerometer signals with vibration frequencies can be expressed. Therefore, the proposed method provides an effective approach to investigate the vibration test of quartz flexible accelerometer.