The Research Of Control System Of The Electromechanical Automatic Parachute Opener

Today is the day of development of science and technology,people may have so many requirements for the safety of the fighter. The conventional mechanical automatic parachute opener exists a lot of weakness. For example,it 's mechanical configuration is very complicated, it's physical dimension is bigger,it's spare parts can't be in general use,it's speed-time control accuracy is lower and it's control regulation is hard to be adjusted etc. All these weaknesses force us to explore more safe and dependable automatic parachute opener. Along with the development of micro-control technique and the extensive application of stepping motor, we proceeded some beneficial exploratory work in applying stepping motor in the automatic parachute opener. First,the general design project of the electromechanical automatic parachute opener is introduced that use a Single Chip Micyoco to control a 2-phase hybrid stepping motor to accommodate time-lapse time of the electromechanical automatic parachute opener according as aero airspeed. This article begins from the principles of 2-phase hybrid stepping motor, set up the universal mathematical model of stepping motor dragging system in the openning wreath control system. On this basis,we proceeded the emulational run and test to the main function of the stepping motor in the electromechanical automatic parachute opener. Through the study of the function of stepping motor in the electromechanical automatic parachute opener, We discover the fact that along with the increasing of the control pulse frequency, the speed of stepping motor is increased, but the electromechanical torque is debased.For exerting the characteristics of stepping motor dragging system in the openning wreath control system,such as responding rapidly and fixing position accurate,we must control the speed of stepping motor. Then, the principles of variable speed control of stepping motor in the openning wreath control system is detailedly analysed. On this basis,we proceeded to select the optimization variable speed control...