著者

久代 育生 鈴木 桂輔

出版者

公益社団法人 自動車技術会

雑誌

自動車技術会論文集 (ISSN:02878321)

巻号頁・発行日

vol.47, no.5, pp.1103-1110, 2016 (Released:2018-01-29)

参考文献数

21

被引用文献数

1

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ジャーク最小操作モデルを基に,基本式のパラメータ変更で,あらゆる走行パターンができる,簡単なサイン関数を用いた近似ジャーク最少モデルを構築. 本モデルを熟練運転者の運転操舵の解析に用いた結果,熟練運転者は,レーンチェンジや修正操舵などの走行タスクにおいてジャークを最小にするような操舵を行っている事を確認した.

著者

田所 克俊 鈴木 桂輔

出版者

ライフサポート学会

雑誌

ライフサポート (ISSN:13419455)

巻号頁・発行日

vol.26, no.3, pp.89-99, 2014-09-15 (Released:2016-03-07)

参考文献数

15

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The mechanism for the activation of cerebral function through singing and listening music was investigated. In this research, the effect of singing and listening to music on cerebral function and the effects on autonomic nerve systems were clarified. The fluctuation of oxyHb was analyzed for quantifying the active state of cerebral function. The CSI to investigate the activation level of sympathetic nerve and the CVI to investigate the activation level of parasympathetic nerve were analyzed for quantifying the fluctuation of autonomic nerve systems. The result of experiment showed that the oxyHb increased during the music tasks and the oxyHb decreased during the rest. Additionally, it was shown that the sympathetic nerve became predominant in singing music. In addition to this, we proposed a new evaluation index quantifying the active status of cerebral function using the absolute value of oxyHb and the differential value of oxyHb. By use of this evaluation index, the effectiveness of relaxation with listening music and relaxation without music on the active status of cerebral function were investigated. In these investigations, the effectiveness of music therapy was increased when the parasympathetic nerve became predominant efficiently

著者

鈴木 桂輔 宮本 康弘

出版者

The Society of Life Support Engineering

雑誌

ライフサポート (ISSN:13419455)

巻号頁・発行日

vol.23, no.4, pp.152-158, 2011 (Released:2013-02-14)

参考文献数

12

被引用文献数

1

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The effectiveness on the muscle expansion and the mechanism of "slow training" which puts a slow burden on muscles in slow operation were investigated. In this research, the frequency analysis of electromyography and investigation of the density of oxygenated hemoglobin in muscles were conducted to clarify the characteristics of the slow training which are different from the conventional training with high burden on muscles, in terms of the activation level of the fast-twitch fiber in muscles of legs. In these investigations, it was clarified that the cumulative value of electromyography during the training is relatively high, and the effectiveness of muscular expansion by the slow training is remarkable, like the conventional training. In addition to this, it was clarified that the fast twitch fiber was activated during the slow training because the power level of high frequency in the FFT analysis of electromyography is relatively high and the oxygenated hemoglobin is relatively low in muscles.

著者

鈴木 桂輔 五藤 光 田中 尚

出版者

公益社団法人 自動車技術会

雑誌

自動車技術会論文集 (ISSN:02878321)

巻号頁・発行日

vol.40, no.1, pp.193-198, 2009 (Released:2010-08-10)

参考文献数

6

被引用文献数

1

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樹木の香り成分であるα-ピネンを供給した場合のドライバの運転特性について,供給濃度と意識レベルとの相関を分析し,意識レベルの向上効果について考察した.また,この香りを供給した場合と衝突防止警報を提示した場合の運転特性の差異について分析し,予防安全の観点での両者の有効性について考察した.

著者

久代 育生 鈴木 桂輔

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.852, pp.17-00143-17-00143, 2017 (Released:2017-08-25)

参考文献数

21

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The purpose of this paper is to clarify the effect of vehicle dynamics and steering system parameter on steering feel. The objective evaluation method for on-center and off-center evaluates steering effort, steering torque gradient, torque hysteresis and other values. Steering effort characteristics such as steering torque-steering angle, steering torque-yaw velocity or steering angle-yaw velocity are important properties for steering feel. Therefore the performance design of steering feel should be based on the steering characteristics. For example, some studies focus on the stability factor for steering feel by changing tire performance. However changing stability factor also changes yaw gain (yaw velocity/steering angle) and self-alignment torque (SAT) characteristics. The steering effort and the steering damping are under influenced of vehicle dynamics. The steering system parameters i.e. stiffness of linkages, frictions and setting of power steering (PS), such as assistance curve, damping control and others, also has influences the steering characteristics. Since many parameters are necessary in the detailed model, it is difficult to clarify the effect of each parameter on the steering characteristics. This paper examines the influence of steering system parameters and vehicle dynamics on the steering characteristics analytically and formulates. The model of the investigation consists of bicycles vehicle model and steering system with three frictions, three damping element, steering linkage, PS assistance curve and damping control. These steering system stiffness components and PS assistance torque decrease the effect of the friction or the damping on torque hysteresis. This study assists to understand the effect of the steering system and vehicle dynamics on the steering effort characteristics.

著者

久代 育生 鈴木 桂輔

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.849, pp.16-00437-16-00437, 2017 (Released:2017-05-25)

参考文献数

30

被引用文献数

1

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The steering feel is an important technical problem for handling and drivability of driver-vehicle system and various kinds of studies have been conducted. The objective evaluation is a key factor to construct model base design process for the steering feel. Many kinds of objective evaluation criteria for the steering feel have been proposed using steering-angle input. However, these objective evaluation criteria for the steering feel should be based on driver's steering operation. The steering responses using steering torque sinusoidal input are similar to the minimum-jerk model of human operation. This study proposes objective evaluation criteria for the steering feel using steering responses by steering-torque sinusoidal input test. From the characteristics of steering torque and steering angle, and the characteristics of steering torque and yaw velocity, the objective evaluation criteria for the steering feel are proposed. For example, the increasing characteristics and the decreasing characteristics for steering torque, hysteresis and linearity of steering angle and yaw-velocity response are evaluation criteria. The objective evaluation criteria by steering torque input shows another aspect of steering characteristics because of changing steering angle response under the influence of vehicle dynamics and steering system dynamics.