Simulation study on an acceleration control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms

To reduce the collision shock and risk of injury to an infant in an in-car crib (or a child safety bed) during a vehicle crash, it is necessary to limit the force acting on the crib below a certain allowable value. To realize this objective, we propose a semi-active in-car crib system with the joint...

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Autor principal:	Takeshi KAWASHIMA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2017
Materias:	shock control occupant crash protection passive safety device child restraint system impact relaxation Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/e2ec3fe15a63414ba561fc42246fc102
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spelling	oai:doaj.org-article:e2ec3fe15a63414ba561fc42246fc1022021-11-26T07:06:29ZSimulation study on an acceleration control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms2187-974510.1299/mej.17-00027https://doaj.org/article/e2ec3fe15a63414ba561fc42246fc1022017-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/4/4/4_17-00027/_pdf/-char/enhttps://doaj.org/toc/2187-9745To reduce the collision shock and risk of injury to an infant in an in-car crib (or a child safety bed) during a vehicle crash, it is necessary to limit the force acting on the crib below a certain allowable value. To realize this objective, we propose a semi-active in-car crib system with the joint application of regular and inverted pendulum mechanisms. The crib is supported by an arm similar to a pendulum, and the pendulum system itself is supported by an arm similar to an inverted pendulum. In addition, the arm acting as a regular pendulum is joined with the arm acting as an inverted pendulum through a linking mechanism, and the friction torque of the joint connecting the base and the latter arm is controlled using a brake mechanism, which enables the proposed in-car crib to gradually increase the deceleration of the crib and maintain it at around the target value. This system not only reduces the impulsive force but also transfers the force to the infant’s back using a spin control system, i.e., the impulse force is made to act perpendicularly on the crib. The spin control system was developed in our previous work. The present work focuses on the acceleration control system. A semi-active control law with acceleration feedback is introduced using a dynamic equation for the jerking of the crib. In addition, the effectiveness of the system is demonstrated using numerical software for a multibody dynamics simulation, and some of results are reported.Takeshi KAWASHIMAThe Japan Society of Mechanical Engineersarticleshock controloccupant crash protectionpassive safety devicechild restraint systemimpact relaxationMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 4, Iss 4, Pp 17-00027-17-00027 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	shock control occupant crash protection passive safety device child restraint system impact relaxation Mechanical engineering and machinery TJ1-1570
spellingShingle	shock control occupant crash protection passive safety device child restraint system impact relaxation Mechanical engineering and machinery TJ1-1570 Takeshi KAWASHIMA Simulation study on an acceleration control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
description	To reduce the collision shock and risk of injury to an infant in an in-car crib (or a child safety bed) during a vehicle crash, it is necessary to limit the force acting on the crib below a certain allowable value. To realize this objective, we propose a semi-active in-car crib system with the joint application of regular and inverted pendulum mechanisms. The crib is supported by an arm similar to a pendulum, and the pendulum system itself is supported by an arm similar to an inverted pendulum. In addition, the arm acting as a regular pendulum is joined with the arm acting as an inverted pendulum through a linking mechanism, and the friction torque of the joint connecting the base and the latter arm is controlled using a brake mechanism, which enables the proposed in-car crib to gradually increase the deceleration of the crib and maintain it at around the target value. This system not only reduces the impulsive force but also transfers the force to the infant’s back using a spin control system, i.e., the impulse force is made to act perpendicularly on the crib. The spin control system was developed in our previous work. The present work focuses on the acceleration control system. A semi-active control law with acceleration feedback is introduced using a dynamic equation for the jerking of the crib. In addition, the effectiveness of the system is demonstrated using numerical software for a multibody dynamics simulation, and some of results are reported.
format	article
author	Takeshi KAWASHIMA
author_facet	Takeshi KAWASHIMA
author_sort	Takeshi KAWASHIMA
title	Simulation study on an acceleration control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
title_short	Simulation study on an acceleration control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
title_full	Simulation study on an acceleration control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
title_fullStr	Simulation study on an acceleration control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
title_full_unstemmed	Simulation study on an acceleration control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
title_sort	simulation study on an acceleration control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
publisher	The Japan Society of Mechanical Engineers
publishDate	2017
url	https://doaj.org/article/e2ec3fe15a63414ba561fc42246fc102
work_keys_str_mv	AT takeshikawashima simulationstudyonanaccelerationcontrolsystemforsemiactiveincarcribwithjointapplicationofregularandinvertedpendulummechanisms
_version_	1718409749961113600

Simulation study on an acceleration control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms

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