Digital Simulation Of The Fighter Ejection Chair System

Computational simulation technology that has been developed for a long time is used almost in every engineering field. Mathematical simulation means that executing a program in a computer (or more) demonstrates the function of a real system. Obviously the way of simulation is economical, efficient and safely.In some west advanced countries. Computational simulation technology used in the design of ejection seats is very mature. On the contrary, the technology is new in our country. In order to enhance our product, we must pay more attention to the research of ejection simulation so that keep up with or surpass those advanced countries.This paper, which simulated the human-seat dynamical system, aims at completing some fundamental jobs to propel the development of computational simulation technology of ejection seats in our country. This paper includes:firstly. Systematically and comprehensively analyses the ejection technology; specifies the function and interrelations of every subsystem of human-seat system, at the same time, models them mathematically; constructs the models of atmosphere and the gravity; simulated the human-seat dynamical system in the state of free flight.Secondly, human-seat system is a typical dynamics system. This paper deeply analyses the methodology of modeling dynamical systems and integration algorithms. Including the principle of modeling dynamic systems, methods of error controls and VV&A. Successfully selects a set of methods that are reasonable and scientific in modeling such systems.Thirdly, among the simulation tools of C++/DSSL, MATLAB/SIMULINK, VisSIM, this paper selects MATLAB/SIMULINK as the tool. Just because of its easiness and comprehensive function. Its RTW and S-function make the SIMULINK models more reusable and transplantable.