This paper presents a virtual-force-based guidance law (VFGL) for path following and obstacle avoidance in unmanned aerial vehicles.First, a virtual spring force and a virtual drag force are designed for straight-line following; then, the dynamic of the cross-track-error is equivalent to a spring mass system, which is easy to tune to acquire stabil
Menq-Rong Wu,1,2 Chia-Hsun Lee,1 Jong-Kai Hsiao1,3 1Department of Medical Imaging, Taipei Tzuchi Hospital, Buddhist Tzu-Chi Medical Foundation, New Taipei City 23142, Taiwan; 2Institute of Biomedical Engineering, National Taiwan University, Taipei 10617, Taiwan; 3School of Medicine, Tzu Chi University, Hualien 97004, TaiwanCorrespondence: Jong-Kai
BACKGROUND: The growing popularity of social networking sites (SNS) raises concerns about privacy and security, especially among teenagers and young people, as they experience different types of unsafe behaviors on SNS.In this regard, the problem of the consequences of using this communication tool has attracted the attention of psychology and soci