Study On Gas-Liquid Ejection Launcher Design And Dynamic Characteristics

Ejection mechanism is used in important military field. In order to improve the invisible performance of fighter, the missile should be hidden completely. Thus an advanced launcher should be designed to ensure the missiles fired safely and flight into the ideal status after be fired. As more and more computer technology are applied in hydraulic control field, there is a trend that hydraulic control technology and component should be digital. In this thesis, a new gas-liquid ejection launcher is designed. In the gas-liquid ejection system, the 2D digital valve is used as the control component which plays a substantial role on the system performance.In this thesis, the mathematical model of ejection mechanism is established, and simulation with Runge-Kutta method is carried out on software MATLAB, at the end the experiment is finished. The results show that the system has many advantages such as maintenance-free——the power of ejection mechanism is from aircraft hydraulic system; the hydraulic energy can be converted into compressed accumulator's gas energy through the hydraulic lines (this process lasted only a few seconds) without added energy; smooth motion; insensitive to environment temperature changes; single-chip motion reliable, parameters adjustment flexible and multi-level speed control. The main contents of this thesis are listed as follows:Chapter 1, in this chapter some relevant information about the history and trend of this research are summarized, and then the purpose, meaning and creative point of this thesis are introduced.Chapter 2, in this chapter the structure of gas-liquid ejecting mechanism and 2D digital valve are introduced. After that the properties of 2D digital valve are verified.Chapter 3, in this chapter the mathematical model of this system is established, which is also simulated with Runge-Kutta method on software MATLAB.Chapter 4, in this chapter experimental system of gas-liquid ejecting mechanism is established and studied.Chapter 5, in this chapter the results are summarized and the prospects of this thesis are proposed.