Abstract:

Based on AVR MCU（Micro Control Unit）which is produced by ATMEL company a four-rotor aircraft IC(Intergrated Circuit) control system is proposed for reliable controlflight. Four-rotor aircraft system mainly includes drive system composed by brushless DC motors, master control system composed by the micro-controller and gyroscopes and wireless remote control system composed by the 2.4 GHz wireless remote control receiver. Firstly, the author uses the PWM (Pulse Width Modulation) signal produced by AVR MCU to drive the control module. Secondly, after the analysis of four-rotor aircraft, the author studies control parameters and achieves the corresponding control algorithm. Thirdly, the author programmes to simulate the corresponding flight attitude. Finally, after many experiments the author will achieve a control design for unmanned flight including turn and three-dimensional control.

Key words: avr micro control unit, gyroscope, brushless DC motor, pulse width modulation(PWM)