Control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms

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

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Autor principal:	Takeshi KAWASHIMA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2015
Materias:	mechanical engineering motion control impact control shock control occupant crash protection passive safety device child restraint system impact relaxation pendulum inverted pendulum Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/909bdb90562743dcb265f12231c259d0
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spelling	oai:doaj.org-article:909bdb90562743dcb265f12231c259d02021-11-26T06:25:42ZControl system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms2187-974510.1299/mej.14-00557https://doaj.org/article/909bdb90562743dcb265f12231c259d02015-03-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/2/3/2_14-00557/_pdf/-char/enhttps://doaj.org/toc/2187-9745To reduce the collision shock and injury risk to an infant in an in-car crib (or in a child safety bed) during a car crash, it is necessary to keep the force acting on the crib constant and below a certain allowable value. To this end, we propose a semi-active in-car crib with joint application of regular and inverted pendulum mechanisms. The crib is supported like a pendulum by arms, and the pendulum system is supported like an inverted pendulum by arms. 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 force acts perpendicularly on the crib. The spin control system was developed previously. In the present study, an acceleration control system is developed. One of the characteristics is that this system has the merits of both a regular pendulum-style in-car crib and an inverted pendulum-style in-car crib. The regular pendulum-style one is suitable when moderate impulsive forces are involved because the crib moves smoothly soon after the force begins to affect the crib. The inverted pendulum-style one is suitable when large impulsive forces are involved because the arm that is initially tilted backward, which constitutes the inverted pendulum, is difficult to move under weak forces. Therefore, the proposed in-car crib is able to increase the acceleration of the crib gradually and maintain it around the target value. This paper focuses on the control system. The control law is introduced, and the robustness is examined using numerical simulation.Takeshi KAWASHIMAThe Japan Society of Mechanical Engineersarticlemechanical engineeringmotion controlimpact controlshock controloccupant crash protectionpassive safety devicechild restraint systemimpact relaxationpenduluminverted pendulumMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 2, Iss 3, Pp 14-00557-14-00557 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	mechanical engineering motion control impact control shock control occupant crash protection passive safety device child restraint system impact relaxation pendulum inverted pendulum Mechanical engineering and machinery TJ1-1570
spellingShingle	mechanical engineering motion control impact control shock control occupant crash protection passive safety device child restraint system impact relaxation pendulum inverted pendulum Mechanical engineering and machinery TJ1-1570 Takeshi KAWASHIMA Control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
description	To reduce the collision shock and injury risk to an infant in an in-car crib (or in a child safety bed) during a car crash, it is necessary to keep the force acting on the crib constant and below a certain allowable value. To this end, we propose a semi-active in-car crib with joint application of regular and inverted pendulum mechanisms. The crib is supported like a pendulum by arms, and the pendulum system is supported like an inverted pendulum by arms. 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 force acts perpendicularly on the crib. The spin control system was developed previously. In the present study, an acceleration control system is developed. One of the characteristics is that this system has the merits of both a regular pendulum-style in-car crib and an inverted pendulum-style in-car crib. The regular pendulum-style one is suitable when moderate impulsive forces are involved because the crib moves smoothly soon after the force begins to affect the crib. The inverted pendulum-style one is suitable when large impulsive forces are involved because the arm that is initially tilted backward, which constitutes the inverted pendulum, is difficult to move under weak forces. Therefore, the proposed in-car crib is able to increase the acceleration of the crib gradually and maintain it around the target value. This paper focuses on the control system. The control law is introduced, and the robustness is examined using numerical simulation.
format	article
author	Takeshi KAWASHIMA
author_facet	Takeshi KAWASHIMA
author_sort	Takeshi KAWASHIMA
title	Control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
title_short	Control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
title_full	Control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
title_fullStr	Control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
title_full_unstemmed	Control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms
title_sort	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	2015
url	https://doaj.org/article/909bdb90562743dcb265f12231c259d0
work_keys_str_mv	AT takeshikawashima controlsystemforsemiactiveincarcribwithjointapplicationofregularandinvertedpendulummechanisms
_version_	1718409793034518528

Control system for semi-active in-car crib with joint application of regular and inverted pendulum mechanisms

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