Design and Fabrication of an Unmanned Aerial Vehicle

The military utilization of Unmanned Aerial Vehicles (UAVs) has improved effectively day by day due to their capacity to carry out the desired work in hazardous and hostile environments while keeping their human administrators at a protected distance. The bigger UAVs likewise give a reliable long span, cost effective platform for observation and in addition weapons. They have been developed to be transformed into an imperative apparatus for the military. The question postured for the project was whether small UAVs additionally had utility in military and business/mechanical applications. It was proposed that smaller UAVs can serve more strategic operations, for example, seeking a village or a building for adversary positions and in addition for completing little scale transportation and conveyance meets expectations in different businesses and marketing endeavors. To accept this suspicion and considering various UAV outlines it was chosen to outline and create a Quadcopter. In this project the primary point is to build up a quadcopter that can be controlled by a straightforward flight controller. With a high payload limit this can be utilized for doing transportation and in addition outside observation as well as surveillanc

Guidance, Navigation and Control System of a Hopper Spacecraft Simulator

The space hopper simulator project drew its origin from a partnership with Penn State University to compete in the Google Lunar XPRIZE competition. Lehigh University is tasked with the exploring the guidance, navigation and control (GN&C) system of the hopper spacecraft. To simulate the dynamics and flight behavior of the concept, Earth-based multirotor flying platforms were developed with the end goal of executing the hopping maneuver.The overall project has been ongoing for more than 5 years and went through several major revisions to fix flaws discovered in the previous design. As older students graduate and new teams are form, knowledge and experience are lost in the process. Due to the time it take to relearn and redesign the simulators, the project progress only get as far as achieving radio controlled flight. The current and 3rd generation development team aims to change that by developing both the hardware and software using modular design.With modular design, the manufacturing, repair and modification process for the multirotor speed up significantly. The damaged component can be replaced with little effort. In addition to the hardware advantages, the software modules enable concurrent development of both a PID and a Fuzzy Logic based flight control system using similar avionics and software architecture. Since the flight operating system function by linking the various software modules, individual modules can easily be swapped to test different control laws, electronic devices, etc. The software modules are also capable of being reused in other applications, such as running the thrust test stand and logging data with the wireless ground station.In theory and simulation, the GN&C system is quite simple. The hopping guidance trajectory can be generated by a set of linear and trigonometric equations. The trajectory can be optimized by minimizing the total energy consumption at the end of the hopping maneuver. The navigational data can be collected from the GPS and localized for the cascade PID controllers to achieve the desired trajectory. In the ideal world, everything is simple and easy.In the real world, a range of problems arise during implementation. Factors such as time delay and noises significantly impact the performance of the control system, making stable aggressive tuning very difficult to achieve. In an attempt to improve the condition, a number of digital filters such as the moving average filter and the Kalman filter were explored. In addition, every sub-system was analyzed in depth to optimize for speed. This resulted in 3 major revisions in changing flight computer and programming languages.Even though the main topic of this research is the guidance, navigation and control system, the project quickly expanded into a systems engineering problem. Everything must work well together in order for the aircraft to achieve stable flight

INForum 2017: Atas do Nono Simpósio de Informática

Este volume contém as atas da 9.a edição do Simpósio em Informática, INForum 2017, a qual decorreu no Pavilhão de Exposições de Aveiro, em Aveiro, conjuntamente com o TechDays 2017, nos dias 12 e 13 de outubro de 2017. (...