نتایج جستجو برای: acceleration control

تعداد نتایج: 1370097  

2008
T. Ono

During transportation by ambulance, the inertial acceleration acts on a patient when an ambulance decelerates or turns a corner. Such acceleration often gives a supine patient physical stress such as blood pressure variation and body sway, which results in pain or a feeling of discomfort. To reduce this undesirable effect of the acceleration, the actively-controlled bed, which controls a postur...

2015
Yota Abe Masaaki Sakamoto Rie Nakazawa Kenji Shirakura

[Purpose] The purpose of this study was to clarify the relationship between acceleration and joint movement by synchronizing accelerometers and a three-dimensional motion analysis system, and to show the utility of an accelerometer as a postural control assessment tool. [Subjects and Methods] Head, lumbar, shank accelerations and various joint angles during single-leg standing were measured of ...

2002
Philip C. Calhoun David Hampton

The acceleration environment on the Intern ational Space Station (ISS) will likely exceed the requirements of many micro-gravity experiments. The Glovebox Integrated Microgravity Isolation Technology (g-LIMIT) is being built by the NASA Marshall Space Flight Center to attenuate the nominal acceleration environment and provide some isolation for microgravity science experiments. G-LIMIT uses Lor...

Journal: :Adv. Human-Computer Interaction 2014
Andrey Esakia Alex Endert Chris North

Large high-resolution displays combine high pixel density with ample physical dimensions.The combination of these factors creates a multiscale workspace where interactive targeting of on-screen objects requires both high speed for distant targets and high accuracy for small targets. Modern operating systems support implicit dynamic control-display gain adjustment (i.e., a pointer acceleration c...

Journal: :advances in railway engineering 0
nazmul hasan snc-lavalin inc. transportation division,1800-1075 west georgia street, vanocuver, british columbia, canada v6e 3c9, tel: 604-662-3555, fax: 604-662-7688, [email protected]

on the circular curve, lateral acceleration affects comfort. on the spiral, both lateral acceleration and jerk affect comfort.  the determination of maximum curving speed on the basis of lateral acceleration only is not critical because the lateral acceleration is proportional to the square of speed whereas jerk is proportional to cubic power of speed. the maximum speed on a curve is thus signi...

Moving car on rough road suddenly gets out of its way for some reason and moves to the edge of the road at the same speed. Since the most important factor in car overturning is vertical acceleration in the wheels and car speed and road conditions determine the vertical instantaneous acceleration, brake system according to change of the spring length is designed in such a way that by monitoring ...

2017
Dexin Zhang

This paper examines the AP-to-ECM interfaces of five vehicles equipped with electronic throttle control systems. All five vehicles employ simple voltage level sensing from two or three sensors in the accelerator pedal assembly. The purpose of the study is to identify any differences in the AP-to-ECM interfaces of vehicles with high reported rates of unintended acceleration compared to vehicles ...

2013
JINGYUE WANG HAOTIAN WANG LIXIN GUO

A half-car model with four DOF was established to simulate the system. On the basis of this model, Selfadapt Parameters Fuzzy-PID control method of the active suspension system is described. In such a model, vehicle speed, vehicle body vertical acceleration, suspension dynamic deflection, the body vertical acceleration and suspension dynamic deflection integrated feedback were used respectively...

Journal: :Optics letters 2010
Ido Dolev Tal Ellenbogen Ady Arie

We present experimental control of the acceleration direction of Airy beams generated by nonlinear three-wave mixing processes in an asymmetrically poled nonlinear photonic crystal. Changing the crystal temperature enabled us to switch the phase matching condition between second-harmonic generation and difference-frequency generation in the same nonlinear crystal and thereby to change the accel...

Journal: :international journal of occupational hygiene 0
keykaous azrah department of occupational health engineering, school of public health, gonabad university of medical sciences, gonabad, iran. ali khavanin department of occupational health engineering, school of medical sciences, tarbiat modares university, tehran, iran. alireza sharifi labor inspector of tehran labor office, tehran, iran. zahra safari department of occupational health engineering, school of medical sciences, tarbiat modares university, tehran, iran. ramazan mirzaei department of occupational health engineering, health promotion research center, zahedan university of medical sciences, zahedan, iran.

nowadays, using public transportation vehicles like metro in large cities are of significance, and exposure to whole-body vibration for the metro passengers is one of the physical contaminations. this paper is conducted with the aim of evaluating the passengers’ convenience and health both in sitting and standing conditions. the present study was done on the passengers of lines 1, 2, and 4 of t...

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