نتایج جستجو برای: wheel chair

تعداد نتایج: 29714  

2013
Hans Peter Dietz

2016
Abdurrhman A. Alroqi Weiji Wang

Many patents have suggested that spinning the aircraft wheel before touchdown would lessen tyre wear as indicated by landing smoke and rubber deposites on the runway caused by skidding wheel at the point of impact. In this paper, the required torque to spin the aircraft wheel at approach speed has been calculated using ANSYS Workbench CFX, which is used to determine the wheel aerodynamic forces...

2005
Jens Dalsgaard Nielsen Kirsten Mølgaard Nielsen Jan Dimon Bendtsen

This paper describes an implemented design of an autonomous vehicle used in precision agriculture for weed and crop map construction with special focus on the onboard controlsystem, the embedded system and the datacommunication system. The vehicle is four wheel driven and four wheel steered (eight DC motors in total) with dimension of approx. 1x1x1 meters. It is constructed with four simular wh...

2005
Viboon Sangveraphunsiri Mongkol Thianwiboon

A method for kinematics modeling of a six-wheel Rocker-Bogie mobile robot is described in detail. The forward kinematics is derived by using wheel Jacobian matrices in conjunction with wheel-ground contact angle estimation. Te inverse kinematics is to obtain the wheel velocities and steering angles from the desired forward velocity and turning rate of the robot. Traction Control also developed ...

2005
Mongkol Thianwiboon Viboon Sangveraphunsiri

A method for kinematics modeling of a six-wheel Rocker-Bogie mobile robot is described in detail. The forward kinematics is derived by using wheel Jacobian matrices in conjunction with wheel-ground contact angle estimation. The inverse kinematics is to obtain the wheel velocities and steering angles from the desired forward velocity and turning rate of the robot. Traction Control is also develo...

2013
T. D. Kothalawala A. Gatto

An exploratory computational investigation using RANS & URANS was carried out to understand the aerodynamics around an isolated single rotating wheel with decreasing ground proximity. The wheel was initially modelled in free air conditions, then with decreasing ground proximity and increased yaw angle with rotational speeds. Three speeds of rotation were applied to the wheel so that the effect ...

Journal: :Journal des anthropologues 1998

Journal: :Journal of French and Francophone Philosophy 2013

Journal: :Chemical & Engineering News Archive 1996

Journal: :Zeitschrift für Medienwissenschaft 2017

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