Academic literature on the topic 'Desert patrol vehicle'

The majority of traffic accidents were caused by the negligence of drivers and road users, followed by vehicle factors, and road conditions as the following variable. The focus of this research is on traffic safety managementcaused by the level of incline and descent on the Sofi-Wayabula road, Morotai Regency. This quantitative descriptive research involved traffic management, maintenance, and patrol supervisors. The research instrument applied consisting observation sheets, interview, and documentation research sheets. The grade or road slope outside the standard requires the mitigation of traffic sign engineering. This study proposes it through the implementation of the Building Information Modeling or BIM method supported by the optimization of 3D animation of traffic signs, especially in North Maluku. The research findings indicated that a number of drivers were assisted by the implementation of 3D animation engineering of traffic signs at a number of accident-prone points along the 10.9 km on the Sofi-Wayabula road, Morotai Regency, North Maluku Province. The research targets agreed by the researcher were effective with traffic safety governance supported by renewable technology methods and engineering.

In recent years, inspired by technological progress and the outstanding performance of Unmanned Aerial Vehicles (UAVs) in several local wars, the UAV industry has witnessed explosive development, widely used in communication relay, logistics, surveying and mapping, patrol, surveillance, and other fields. Vertical Take-Off and Landing fixed-wing UAV has both the advantages of vertical take-off and landing of rotorcraft and the advantages of long endurance of fixed-wing UAV, which broadened its application field and is the most popular UAV at present. Recently, fixed-wing UAV failure analysis highlights that cruise engine shutdown is the most common reason for emergency landing, which is also a governing factor for Vertical Take-Off and Landing (VTOL) fixed-wing UAV failures. Nevertheless, the emergency landing trajectory of the latter UAV type after engine shutdown is different from that of the conventional fixed-wing UAVs due to the VTOL power system. Hence, spurred by the requirement of a safe emergency landing trajectory for VTOL fixed-wing UAVs, this paper develops an architecture capable of safe emergency landing for such platforms. The suggested method develops a particle dynamics model of the VTOL UAV and analyzes its aerodynamic characteristics utilizing Computational Fluid Dynamics (CFD) results. The UAV’s trajectory is divided into three parts for enhanced planning. For the guidance stage, the initial position and heading angle are arbitrary. Hence, the Dubins shortest cross-range and the fastest descent trajectory are adopted to steer the UAV above the landing window quickly. The spiral stage comprises a conical and cylindrical part combined with a spiral descent trajectory of variable radius for energy management and landing course alignment. Given the limited energy storage of VTOL power systems, the landing stage exploits an optimal control trajectory problem solved by a Gaussian pseudospectral method, involving trajectory conventional landing planning, unpowered landing, distance optimal landing, and wind-resistant landing. All trajectories meet the dynamics constraints, terminal constraints, and sliding performance constraints and cover both 2-dimensional and 3-dimensional trajectories. A large number of simulation experiments demonstrate that the proposed trajectories manage broad applicability and strong feasibility for VTOL fixed-wing UAVs.