• 제어로봇시스템학회논문지
• /
• 제14권12호
• /
• pp.1253-1259
• /
• 2008

This paper presents a landing controller and guidance law for net-recovery of fixed-wing unmanned aerial vehicles. A linear quadratic controller was designed using the system identification result of the unmanned aerial vehicle. A pursuit guidance law is applied to guide the vehicle to a recovery net with imaginary landing points on the desired approach path. The landing performance of a pure pursuit guidance, a constant pseudo pursuit guidance, and a variable pseudo pursuit guidance is compared. Numerical simulation using an unmanned aerial vehicle model was performed to verify the performance of the proposed landing guidance law.

• International Journal of Aeronautical and Space Sciences
• /
• 제11권2호
• /
• pp.110-117
• /
• 2010

We propose guidance laws based on a pursuit-evasion game. The game solutions are obtained from a pursuit-evasion game solver developed by the authors. We introduce a direct method to solve planar pursuit-evasion games with control variable constraints in which the game solution is sought by iteration of the update and correction steps. The initial value of the game solution is used for guidance of the evader and the pursuer, and then the pursuit-evasion game is solved again at the next time step. In this respect, the proposed guidance laws are similar to the approach of model predictive control. The proposed guidance method is compared to proportional navigation guidance for a pursuit-evasion scenario in which the evader always tries to maximize the capture time. The capture sets of the two guidance methods are demonstrated.

• 한국항공우주학회지
• /
• 제48권10호
• /
• pp.765-772
• /
• 2020

항공기의 임무수행 시간을 연장하기 위해 도입된 공중급유를 수행하기 위해서는 두 항공기간의 랑데부 기동이 필수적으로 요구된다. 본 논문에서는 공중급유를 위해 가변 추적유도법칙을 이용한 랑데부 유도기법을 다룬다. 르야프노프 안정성 이론을 이용하여 가변 추적유도법칙 기반 랑데부 유도기법을 설계하였다. 제안한 유도기법은 두 항공기가 일정한 속력으로 비행하고 있을 때, 두 항공기 간의 헤딩각이 일치하도록 작동하여 랑데부 기동을 수행하도록 한다. 수치 시뮬레이션을 통해 제안한 랑데부 유도기법의 성능을 검증하였다.