Tham khảo tài liệu 'aerial vehicles part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 492 Aerial Vehicles UAV were discussed. Long endurance UAV flights require a number of aspects to be taken into consideration during the design phase. In section two an overview of potential renewable power sources for long endurance UAVs were presented. It was shown how a hybrid combination of photovoltaic cells and Li-Po batteries can fulfil the requirements of a long endurance UAV power source. Fuel cell power sources are attractive power sources for shorter duration UAV flights. Section three showed by coupling the low cost inertial navigation system to a suitable control system how a complete navigation solution can be provided for long endurance UAV flights. A number of control techniques are discussed enabling the construction of autopilots for autonomous flight applications. The field of image processing is a rapidly developing field. Since imaging sensors are ideal UAV payload sensors advances in image processing directly benefits many UAV applications. A number of sensor payload design consideration are discussed with regard to long endurance UAV missions. In an overview paper in 2007 Kenzo Nonami Nonami 2007 indicated the following aspects as important future research areas for UAV civilian use Formation flight control for data relay in-air refuelling observation work with a possible flight control accuracy in the cm-order Integrated hierarchical control in order to fly different classes of UAVs simultaneously. An example sited is that of coordinating various sizes of UAVs and MAVs with a larger supervisory UAV High altitude flight . flights in the stratosphere for scientific observation missions High precision trajectory following flight All weather flight Collision-avoidance systems Intelligent flight control and management systems and Advanced reliability. Long endurance UAVs are an empowering technology for a number of previously unexploited applications which are now within reach of the civilian commercial market. 7. References Adams . Cooper
