Search results for "Shooting technique"

showing 3 items of 3 documents

Optimal control with state constraints and the space shuttle re-entry problem

2003

In this article, we initialize the analysis under generic assumptions of the small \textit{time optimal synthesis} for single input systems with \textit{state constraints}. We use geometric methods to evaluate \textit{the small time reachable set} and necessary optimality conditions. Our work is motivated by the \textit{optimal control of the atmospheric arc for the re-entry of a space shuttle}, where the vehicle is subject to constraints on the thermal flux and on the normal acceleration. A \textit{multiple shooting technique} is finally applied to compute the optimal longitudinal arc.

[ MATH.MATH-OC ] Mathematics [math]/Optimization and Control [math.OC]Minimum principleMultiple shooting techniques49K15 70M2049M15Control of the atmospheric arc[MATH.MATH-OC] Mathematics [math]/Optimization and Control [math.OC]Optimal control with state constraints[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC]
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Helical Shift Mechanics of Rubber V-Belt Variators

2011

A very common configuration of V-belt variators for motorcycles considers the correction of the belt tensioning depending on the resistant torque by means of suitable helical-shaped tracks allowing the driven half-pulleys to close/open. The theoretical model for belt-pulley coupling is rather complex for this configuration, where one half-pulley may run in advance and the other one behind with respect to the belt, and requires the repeated numerical solution of a strongly nonlinear differential system by a sort of shooting technique, until all the operating conditions are fulfilled (angular contact extent, torque, and axial force). After solving the full equations, the present study develop…

business.product_categoryNumerical solutionThrustResistant torqueStrongly nonlinearPulleyAxial thrustNatural rubberTorqueBoundary value problemAxial forceTheoretical modelTension levelCouplingPhysicsOperating conditionTension (physics)Mechanical EngineeringMechanicsComputer Graphics and Computer-Aided DesignSettore ING-IND/13 - Meccanica Applicata Alle MacchineComputer Science ApplicationsClosed form approximationVariatorsClosure (computer programming)Mechanics of Materialsvisual_artShooting techniquevisual_art.visual_art_mediumAstrophysics::Earth and Planetary Astrophysicsbusiness
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Technical determinants of competitive rifle shooting performance

2018

The purpose of this thesis was to identify technical determinants of elite level air rifle and biathlon standing shooting performance and investigate how these technical determinants are affected by training, competition situation, or intense exercise. Forty international and national level air rifle shooters and 17 biathletes participated in the studies. In air rifle shooting, shooting performance, aiming point trajectory, and postural balance were measured from each shot in a simulated competition series in the training situation and in the actual competition situation. The shooters’ competition results were collected from each measured season. In biathlon, the same shooting technical var…

tarkkuuscompetition performancetasapainokilpailutampujatstability of holdtekniikkaampumahiihtoaiming accuracytiming of triggeringharjoittelushooting techniqueilmakivääritbiomekaniikkaammuntaajoituscleanness of triggeringurheilusuorituksetpostural balancehuippu-urheilijat
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