Method For Estimating Practical Stability Region And Application Of Which In Process Of Helicopter Landing On Ship

Since being invented, helicopters have played important role in the, but because of the dynamic characters of them, the accident frequency is high during the using process of helicopters, especially the process of landing on a naval vessel. In order to solve these problems a method based on Poincare Mapping which can be used in the autonomous system and the nonautonomous system with periodic excitation to estimate the practical stability region is proposed and applied in solving the dynamic problem during the process of a helicopter landing on a ship.However, using the above mentioned method in a multidimensional dynamic system would lead to some problems like heavy calculation burden and difficulty in visualization. Based on the structure of the phase space, a new method of decoupling is proposed. After being decoupled the dynamic system of a helicopter is divided into some planar dynamic systems.Generally, the performance of a landing gear is indicated by several parameters, so it is hard to quantify the performance. A new standard is proposed that is the probability of safe landing on a ship. A probability is a scalar, so it is easy to be compared, and this probability is determined by all the parameters of a landing gear. The research of this article can provide a reference of optimizing the parameters of a landing gear of a helicopter.