Methods of data processing and error control in UAV landing gear drop test

The development of UAV promotes the drop tests of UAV landing gear more and more attentions. But gradually increasing UAV landing gear drop tests cause the problems of large errors among theoretical energy, measurement energy and drop energy. In this article, methods of data processing and error control are proposed here at the basis of the reasons of errors are detailed analyzed. At beginning, the main equipment of hardware and software, and some important concepts are given. And at the second, methods of filter, effects of electromagnetic lock demagnetization time delay and the friction force when falling system falling are discussed, the same as the errors from sensors such as time delay of displacement sensor and the influence of vibration to sensors, and the ways to solve the problems are given as following. At last, two kinds of heading speed simulation methods are discussed to explain the importance of heading speed, control methods are also given here. Test results of some aircrafts show that all of above methods of data processing and error control can be used to reduce the error of UAV landing gear drop tests and improve test accuracy.