Safety recommendations of winter terrain park jumps into airbags.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of science and medicine in sport"
DOI: 10.1016/j.jsams.2018.09.229
Abstract: OBJECTIVES In winter terrain parks special airbags are used for skiers and snowboarders to practice jumps and achieve safe landings. However, in 2010 two skiers landed at the end of oval airbags. One suffered fatal,… read more here.
Keywords: takeoff; winter terrain; flight; approach ... See more keywords
Jumping in arboreal salamanders: A possible tradeoff between takeoff velocity and in-air posture.
Sign Up to like & getrecommendations! Published in 2019 at "Zoology"
DOI: 10.1016/j.zool.2019.125724
Abstract: Jumping performance can have important implications for an animal's fitness by expanding its ability to evade predators and move between microhabitats. Jumping in terrestrial plethodontid salamanders is achieved through lateral bending and rapid unbending of… read more here.
Keywords: takeoff; arboreal salamanders; salamanders possible; air ... See more keywords
Modeling and verification of helicopter roll-on takeoff based on optimal control theory
Sign Up to like & getrecommendations! Published in 2023 at "Aircraft Engineering and Aerospace Technology"
DOI: 10.1108/aeat-04-2022-0097
Abstract: Purpose The paper aims to establish a comprehensive optimization analysis model for a helicopter roll on the ground and take off based on optimal control method. The trajectory and control of the entire process are… read more here.
Keywords: model; optimal control; helicopter; takeoff ... See more keywords
Control Design for the Autonomous Horizontal Takeoff Phase of the Reusable Launch Vehicles
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Access"
DOI: 10.1109/access.2020.3001186
Abstract: The control system design for the reusable launch vehicles (RLVs), especially in the autonomous horizontal takeoff phase, is a highly challenging task. Significant issues arise due to the high nonlinearity, large uncertainties of aerodynamic coefficients… read more here.
Keywords: control; launch vehicles; takeoff; reusable launch ... See more keywords
Design of a Passive Vertical Takeoff and Landing Aquatic UAV
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Robotics and Automation Letters"
DOI: 10.1109/lra.2016.2633623
Abstract: With the goal of extending unmanned aerial vehicles mission duration, a solar recharge strategy is envisioned with lakes as preferred charging and standby areas. The Sherbrooke University Water-Air VEhicle (SUWAVE) concept developed is able to… read more here.
Keywords: takeoff; design passive; passive vertical; takeoff landing ... See more keywords
Active Vertical Takeoff of an Aquatic UAV
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Robotics and Automation Letters"
DOI: 10.1109/lra.2020.3003296
Abstract: To extend the mission duration of smaller unmanned aerial vehicles, this letter presents a solar recharge approach that uses lakes as landing, charging, and standby areas. The Sherbrooke University Water-Air VEhicle (SUWAVE) is a small… read more here.
Keywords: active vertical; takeoff aquatic; vertical takeoff; aquatic uav ... See more keywords
Sea-unammned aerial vehicle takeoff characteristics analysis method based on approximate equilibrium hypothesis
Sign Up to like & getrecommendations! Published in 2019 at "Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering"
DOI: 10.1177/0954410017751765
Abstract: In this paper, transient multiphase flow computational fluid dynamics simulations based on volume of fluid model are conducted for a sea-unmanned aerial vehicle. The approximate equilibrium hypothesis is implemented after estimating the acceleration in the… read more here.
Keywords: takeoff; sea unmanned; sea; unmanned aerial ... See more keywords
VR-Supported Analysis of UAV—Magnetic Launcher’s Cart System
Sign Up to like & getrecommendations! Published in 2023 at "Energies"
DOI: 10.3390/en16104095
Abstract: The subject of the research is a model of a magnetic launcher, which is an innovative alternative to commercially occurring unmanned aircraft launchers (UAV). As the take-off is an energy-demanding phase of the flight; therefore,… read more here.
Keywords: system; aircraft; magnetic launcher; supported analysis ... See more keywords