Launcher Disturbance Measurement And Analysis

Launching disturbance is one of the key factors which would influence launching intensity. In this thesis, angular velocity was put forward as the characteristics of launching disturbance based on the performance of launching vibration. A test system was set up for measuring the launching disturbance by using of gyroscope.The evaluation of the performance of gyroscope and data acquisition system for the test system was conducted, and software based on virtual instrumentation technology was worked out for the system. The integrated test system was used to measure launching disturbance of several launching equipments in real field tests. The test result illustrates that the system is suitable in field test and has good reliability, and it is also useful for evaluating the stability of launching equipment. Data process of the test results was conducted in both time domain and joint time-frequency (JTF) domain. In time domain, a set of suitable analysis method was put forwards according to the characteristics of launching disturbance. The different phases of measured vibration curve could be used to describe the dynamic procedure of the launching stage sufficiently In JTF domain, the usability of different JTF analysis algorithms was compared. Spectrograms in JTF domain were obtained. A brand new method for launch equipment experiment was provided based on the research of this thesis.