Design And Implementation Of Engine Control System For An Unmanned Air Vehicle

Aero-engine is the power source of Unmanned Air Vehicle (UAV), its dynamic and static characteristics directly affect the performances of UAV. Engine control is the foundation of UAV flight control system, and the key factor to realize autonomous flight. An excellent Engine Control System (ECS) doesn't exist without the supports of corresponding hardware and control algorithm. This paper focuses on the design and implementation of software and hardware and the design of ECS control law.Firstly, the constituent parts, the architecture and the functions of ECS were designed according to the requirements of engine control. Secondly, the requirement analyses about hardware were made, the devices such as flight control computer, sensors, data-link units and ground control station were selected, and then the hardware architecture of ECS was achieved. Through analyses and comparisons of different software development environments, the appropriate one was chosen. By using it, the airborne programs of engine controller with real-time performance and reliability were developed; the control and monitoring software running on ground station with perfect functions, easy operations and convenient transplantation were then developed. Thirdly, the adaptive PID control concepts were introduced to design an engine controller which adaptively adjusts PID parameters under different work conditions and improves the engine control effectiveness. Finally, engine tests were built to validate the capability and functionality of ECS and a hardware-in-the-loop simulation experiment was conducted to verify the control performance of adaptive PID controller. The results show the ECS meet the requirement of UAV flight control.