Development Of ST-3 Airship Fly Control System

This paper discusses the present condition of airship technique development at home and overseas.According to the flight control requirement of ST-3 telecontrol airship that is manufactured independent, studying the advantage of the foreign similar products, design and manufacture the flight control system of ST-3 telecontrol airship.In order to make ST-3 telecontrol airship to rise and fall perpendicularly , the system takes single chip computer PIC16F877 as the control center. It adopts the improved remote control device which transmit and receive by radio . It adopts the software to identify the pulse width control signal which is transmitted by signal receiver and operates accordingly. The control electric circuit of step motor is designed in the control mainboard to receive the control pulse that the single chip computer transmited, driving the step motor directly.The system adopts the receiver of GPS to transmit height data to the single chip computer through the serial port and adopts the software to identify the height data that is received through the serial port, adopts bang bang- PID compound control method to control elevator helm machine after processing the height data, and the enacted height flight is achieved.It adopts the LCD to display the parameters, which makes the amount of informations of the system to increase obviously. It foreordains height parameter by system software and controls combined with hand and automatic in the process of flight. It adopts the strong anti-interference design that combined with software and hardware.The system primarily satisfies the requirement of design through adjustment and experiment of the software and hardware. The system can control the flight process safely and reliably.It can also be operated simply and agilely.