Results 1 to 10 of about 10,835 (274)
Investigating the Knuckleball Effect in Soccer Using a Smart Ball and Training Machine [PDF]
Sensors, 2022 The term knuckleball in sporting jargon is used to describe a ball that has been launched with minimal spin, resulting in a trajectory that is erratic and unpredictable.
David Eager +3 more
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Optimization method for catching deviation of table tennis training robot based on physical motion model and YOLOv3 [PDF]
Scientific ReportsTo solve the receiving deviation caused by inaccurate visual detection, large trajectory prediction errors, and system delay in table tennis training robots, the core idea of “perception-prediction-control” full chain collaborative optimization is taken ...
Xudong Wang
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Experimental studies of the aerodynamics of spinning and stationary footballs [PDF]
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2008 The accurate discrimination of the aerodynamic parameters affecting the flight of sports balls is essential in the product development process. Aerodynamic studies reported to date have been limited, primarily because of the inherent difficulty of making accurate measurements on a moving or spinning ball.
Adrian Spencer
exaly +2 more sources
Ball Motion Control in the Table Tennis Robot System Using Time-Series Deep Reinforcement Learning
IEEE Access, 2021 One of the biggest challenges hindering a table tennis robot to play as well as a professional player is the ball’s accurate motion control, which depends on various factors such as the incoming ball’s position, linear, spin velocity and so
Luo Yang +3 more
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Spin Rate Measurements in Cricket Bowling Using Magnetometers
Proceedings, 2020 The ability to measure and classify spin has been of great interest to cricket organizations, coaches, and athletes. While video is common, an alternative approach is to use 3D motion capture analysis with reflective spheres, which changes the ...
Aswath Kumar +3 more
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Flying spin qualities testing of airplane [PDF]
Tehnika, 2015 In this paper is presented the theoretical analysis of origins and characteristics of spinning motion. There are precise explanation of every stage spin flight and basic meaning of notion.
Kostić Čedomir J. +2 more
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The aerodynamics of a spinning shell [PDF]
Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1920 Abstract The paper to which this abstract is meant to serve as a non-technical introduction contains the results of work undertaken at the request of the Ordnance Committee and is published with their permission. (1) The Problems of Experimental External Ballistics.—A spinning shell moving through the air is subjected in general to a ...
Ralph Howard Fowler +3 more
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Spiraling light: from donut modes to a Magnus effect analogy
Nanophotonics, 2021 The insight that optical vortex beams carry orbital angular momentum (OAM), which emerged in Leiden about 30 years ago, has since led to an ever expanding range of applications and follow-up studies. This paper starts with a short personal account of how
Spreeuw Robert J. C.
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Aerodynamic Analysis of a Spinning Missile with Dithering Canards [PDF]
Journal of Spacecraft and Rockets, 2002 A generic spinning missile with dithering canards is used to demonstrate the utility of an overset structured grid approach for simulating the aerodynamics of rolling airframe missile systems. The approach is used to generate a modest aerodynamic database for the generic missile.
Tor Nygaard, Robert Meakin
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X. The aerodynamics of a spinning shell [PDF]
Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character, 1921 Abstract This paper contains the results, theoretical and experimental, of work undertaken, at the request of the Ordnance Committee, by the authors as Technical Officers of the Munitions Inventions Department. Permission to publish such parts as appear to be of general scientific interest has now been granted by the Ordnance ...
Ralph Howard Fowler +3 more
openaire +1 more source