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An event-based hierarchical control framework is presented for the control of power flow in vehicle systems. With multiple systems and subsystems interacting over a wide range of timescales, the control performance of vehicle systems can be significantly improved using hierarchical control which directly accounts for interactions among these systems and timescales. However, time-based hierarchical...
In this work, design and control system development of a gas-electric hybrid quad tilt-rotor UAV with morphing wing are presented. The proposed aircraft has an all carbon-composite body, gas-electric hybrid electric generation system for 3 hours hovering or up to 10 hours of horizontal flight, a novel configuration for VTOL and airplane-like flights with minimized aerodynamic costs and mechanical...
Hypersonic vehicle has high military value in terms of real-time reconnaissance, remote rapid deployment and precision strike, especially the implementation of real-time reconnaissance mission has unique advantages. Efficient thrust, the aircraft must be flying high dynamic pressure conditions, in order to control the resulting aerodynamic heating and aerodynamic drag for the hypersonic vehicle angle...
In view of problem for miniaturizing Micro Air Vehicles (MAV), a novel asymmetrical pitch system faced to rotary wing MAV is introduced. The pitch mechanism and control characteristics are studied and analyzed. Because the deformation of elasticity link is key to generate the blade pitch, it is analyzed and calculated by elasticity finite element method. And the results illustrate the linear relationship...
Four-rotor micro aerial robots, so called quadrotor UAVs, are one of the most preferred type of unmanned aerial vehicles for near-area surveillance and exploration both in military and commercial in- and outdoor applications. The reason is the very easy construction and steering principle using four rotors in a cross configuration. However, stabilizing control and guidance of these vehicles is a difficult...
This paper discusses the structure of a multi modal control framework for generation and control of aggressive maneuver profiles for agile unmanned vehicles. It is shown that any arbitrary flight maneuver can be decomposed into simpler flight modes and modal parameters, which are derived from combat maneuvers and aerobatics. Feasible maneuver generation problem is complicated by both sequence of the...
This work presents a formulation of a stable receding horizon controller (RHC) for the minimum time trajectory optimization problem with a vehicle flying in a complex environment with obstacles and no-fly zones. The overall problem is formulated using mixed-integer linear programming (MILP). The RHC uses a simple vehicle dynamics model in the near term and an approximate path model in the long term...
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