Visual Navigation System for Maritime UAV Autonomous Landing
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摘要
In spite of a success in maritime UAVs' application,there still hold a challenge on real-time and accurate state estimation during small UAV autonomous landing.This paper presents a significant navigation system based on vision technology that could measure maritime UAV's position and attitude without other onboard sensors.In the system,a robust algorithm is proposed to detect special markers(LEDs owning fixed flicker frequency) mounted around maritime UAV well,which could recognize target by its frequency feature from complicated background.In actual process,there exist vast noises,i.e.Gaussian noise.Hence,Particle Filtering is suggested to filter the useful information from mixed observations and smooth the entire UAV's flight trajectory.Using the method mainly,we have expected to improve maritime UAV's autonomy and make it have the ability of take-off or landing on special‘habitat' for a temporary rest where the vehicle could recharge or avoid dangers,like bad weather.Finally,the visual navigation system for UAV is tested with our small quadrotor that has good performance on mobility,and results show it works well.
In spite of a success in maritime UAVs' application,there still hold a challenge on real-time and accurate state estimation during small UAV autonomous landing.This paper presents a significant navigation system based on vision technology that could measure maritime UAV's position and attitude without other onboard sensors.In the system,a robust algorithm is proposed to detect special markers(LEDs owning fixed flicker frequency) mounted around maritime UAV well,which could recognize target by its frequency feature from complicated background.In actual process,there exist vast noises,i.e.Gaussian noise.Hence,Particle Filtering is suggested to filter the useful information from mixed observations and smooth the entire UAV's flight trajectory.Using the method mainly,we have expected to improve maritime UAV's autonomy and make it have the ability of take-off or landing on special‘habitat' for a temporary rest where the vehicle could recharge or avoid dangers,like bad weather.Finally,the visual navigation system for UAV is tested with our small quadrotor that has good performance on mobility,and results show it works well.
引文
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