The Study Of Flight Control Signal Extraction And Processing In Small-Scale Unmanned Helicopter

In modern time, with rapid development of control technology, microelectronic technology, technology of unmanned aircraft have been greatly accelerated as well, application domain of unmanned aircraft is spread to all fields, and be perceived by people gradually. Small unmanned helicopter has its unique flight features, it can realize flight action which fixed wing aircraft can not, so it becomes target investigated by many scientific research. Flight control system is the key component for the small unmanned helicopter, it determines flight attitude of the small unmanned helicopter, therefore, enhance research work of this field is essential.To have a research for fight control system of small unmanned helicopter is helpful for us to optimize it, and at the same time, we have a research for control algorithm, control system development and flight navigation of small unmanned helicopter. This thesis sets"Raptor 50 V2"model helicopter as the study subject, and gives introduction on linear kinematics equation of the small unmanned helicopter first, set up simplified model of the small unmanned helicopter and then analyze it, setting PID control by genetic algorithm, optimizing longitudinal channel, horizontal channel, height channel, course channel respectively for the small unmanned helicopter, carry on research for the coordinated turn issue, and use MATLAB simulation software to analog simulation. After that, overall project has been conducted on flight control system of the small unmanned helicopter, which including type selection for system hardware, design of hardware circuit, software design of each main functional module, and has been debugged as well, thus solved issues which may occur during debugging process. MC9S12DG128 single-chip microcomputer of Motorola Corporation was selected for master control computer, data processing and generation can be realized, L3G4200D digital gyroscope was adapted for collecting flight pose, FT1100 wireless module was adapted for data transmission and then display at receiving end. Control of the small unmanned helicopter was realized through closed-loop control method.