国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

The moment of inertia is one of the important parameters of the static characteristic of ammunition.It was found in the test that the deviation value of the rotaional inertia of 85mm spline reached 0.83% and the result cannot meet the task requirements.After checking the sigal,it is confirmed that the signal collected by the photoelertric sensor is mixed with noise signal.To solve the problem of the voltage pulse sequence signal jittering at the cut-off voltage which cause bigger measured periodic deviation, decomposing signal in sym8 wavelet way and de-nosing signal by the threshold selection algorithm make the pulse voltage sequence curve more smooth.De-nosing effect of haar wavelet,db3 wavelet,coif wavelet,Bior wavelet,sym 2wavelet,dmey wavelet is compared,and it shows that dmey wavelet is more effective. A new method is adopted to calculate the period,and the consistency and precision of measured data is improved.The result shows that new algorithm is better than existing one,and it has high precision and better fault-tolerant ability.The new algorithm has high application value in measurement for moment of inertia.