Launch Tower Vibration Parameters Analysis Approach Under Launch Environment

Rocket launch environment formed in the process of launching makes the launch tower to withstand a certain degree of vibration, which to some extent on the launch tower caused damage, with the increase of rocket mission, the damage of launch tower accumulates gradually, this will make the state of the launch tower becomes unstable and affect the success or failure rocket mission, Therefore, it is necessary to launch a rocket launch tower to withstand vibration test, but the rocket launch environment is extremely complex and bad, launch tower vibration parameters so measured with a certain amount of noise, vibration can not be accurately assessed for the strength to withstand the launch tower to provide evidence. Thus, in the article, we study the method of launch tower vibration parameters analysis and provide the the basis for the launch tower of the health assessment and life prediction.Based on the launch tower vibration parameters tester transmitter design and editing programs and circuit design are introduced on, the use of the launch tower vibration parameters tester measured vibration parameters launch tower two different measuring points, and draw vibration waveform parameters. Advantages and disadvantages and scope of application of Fourier transform, wavelet transform and wavelet packet transform are analysed.Fourier transform is not suitable for the launch tower vibration parameters such non-stationary signal processing for noise reduction, but the wavelet transform and wavelet packet transform is suitable for non-stationary signals, so wavelet transform and wavelet packet transform vibration parameters for noise reduction, noise reduction and calculated SNR and RMSE vibration parameters, the results show that wavelet packet transform vibration parameters of noise reduction is better than wavelet transform.After noise vibration parameters, the main vibration frequency band and non-stationary energy distribution of the vibration characteristics of the parameters.Time-Frequency Analysis forvibration parameters is performed by wavelet transform in order to provide the basis for the study of launch tower vibration parameters characteristics of non-stationary random;using wavelet packet transform for vibration parameters’ Frequency Band Energy Analysis can calculate the percentages in the total energy of the band energy. Comprehensiving analysis of these three can evaluate damage to the launch tower at the measuring point corresponding to the measured vibration parameters.After the adoption of the above-described methods for processing and analysis of vibration parameters, it can be a good basis for the launch tower to provide vibration intensity assessment and fit the research purpose of this subject.