Small video satellites have unique advantages of short development cycle,agile attitude maneuver,real-time video imaging.They have broad application prospects in space debris,faulty spacecraft,and other space target d...Small video satellites have unique advantages of short development cycle,agile attitude maneuver,real-time video imaging.They have broad application prospects in space debris,faulty spacecraft,and other space target detection and tracking.However,when a space target first enters the camera’s visual field,it has a relatively large angular velocity relative to the satellite,which makes it easy to deviate from the visual field and cause off-target problems.This paper proposes a novel visual tracking control method based on potential function preventing missed targets in space.Firstly,a circular area in the image plane is designed as a mandatory restricted projection area of the target and a visual tracking controller based on image error.Then,a potential function is designed to ensure continuous and stable tracking of the target after entering the visual field.Finally,the stability of the control is proved using Barbarat’s lemma.By setting the same conditions and comparing with the simulation results of the proportion-derivative(PD)control method,the results show that when there is a large relative attitude motion angular velocity between the target and the satellite,the track-ing method based on potential function can ensure that the tar-get does not deviate from the field-of-view during the tracking control process,and the projection of target is controlled to the desired position.The proposed control method is effective in eliminating tracking error and preventing off-target simultane-ously.展开更多
简述火炮窥膛录像设备主要硬件组成及功能,运用Visual Studio 2010可视化集成环境,基于Visual C#.NET开发火炮窥膛录像设备软件,设计软件功能,实现6大功能模块。将数据流实时传输到计算机中,于软件界面视频窗口观测身管内膛状态,并且具...简述火炮窥膛录像设备主要硬件组成及功能,运用Visual Studio 2010可视化集成环境,基于Visual C#.NET开发火炮窥膛录像设备软件,设计软件功能,实现6大功能模块。将数据流实时传输到计算机中,于软件界面视频窗口观测身管内膛状态,并且具有录像数据留存功能。通过实炮实验得知,软件兼容火炮窥膛录像设备,通过IP地址、用户名和密码登录后能够清晰观测身管内部形貌,并可实现录像保存等功能。展开更多
文摘Small video satellites have unique advantages of short development cycle,agile attitude maneuver,real-time video imaging.They have broad application prospects in space debris,faulty spacecraft,and other space target detection and tracking.However,when a space target first enters the camera’s visual field,it has a relatively large angular velocity relative to the satellite,which makes it easy to deviate from the visual field and cause off-target problems.This paper proposes a novel visual tracking control method based on potential function preventing missed targets in space.Firstly,a circular area in the image plane is designed as a mandatory restricted projection area of the target and a visual tracking controller based on image error.Then,a potential function is designed to ensure continuous and stable tracking of the target after entering the visual field.Finally,the stability of the control is proved using Barbarat’s lemma.By setting the same conditions and comparing with the simulation results of the proportion-derivative(PD)control method,the results show that when there is a large relative attitude motion angular velocity between the target and the satellite,the track-ing method based on potential function can ensure that the tar-get does not deviate from the field-of-view during the tracking control process,and the projection of target is controlled to the desired position.The proposed control method is effective in eliminating tracking error and preventing off-target simultane-ously.
文摘简述火炮窥膛录像设备主要硬件组成及功能,运用Visual Studio 2010可视化集成环境,基于Visual C#.NET开发火炮窥膛录像设备软件,设计软件功能,实现6大功能模块。将数据流实时传输到计算机中,于软件界面视频窗口观测身管内膛状态,并且具有录像数据留存功能。通过实炮实验得知,软件兼容火炮窥膛录像设备,通过IP地址、用户名和密码登录后能够清晰观测身管内部形貌,并可实现录像保存等功能。
