In this study, modeling and LQR control of a reaction wheel inverted pendulum system is described. The model created by using 3D CAD platform exported to Simscape Multibody. multibody linearized derive state-space representation. A (Linear-quadratic regulator) controller designed applied for balance the pendulum. results show that deriving representation from an easy effective way dynamic syste...

field capacity, fuel consumption and drive wheel slippage in massey ferguson (mf399) tractor with standard and liquid ballasted (630 kg) axle load and at 4wd mode was evaluated and compared. the tests were conducted at the experimental station, college of agriculture, shiraz university, in a field with clay loam soil at average moisture content of 18% d.b. the experiment was of a randomized com...

Wheel defects on trains, such as flat wheels and out-of-roundness, inevitably jeopardize the safety of railway operations. Regular visual inspection and checking by experienced workers are the commonly adopted practice to identify wheel defects. However, the defects may not be spotted in time. Therefore, an automatic, remote-sensing, reliable, and accurate monitoring system for wheel condition ...

Methods for multibody modelling and simulation should accurately replicate the dynamic behaviour of rail-wheel interface including precise values for wheel-rail contact positions. This paper studies the development of a novel 3-D wheel-rail contact model which is used for dynamic simulation of a suspended wheelset with parameters listed for a typical Mark IV coach. The contact point locations o...

This paper aims to study the mechanism of coolant penetration into a wheel-work contact zone when a segmented or conventional wheel is used in surface grinding. Based on the principles of fluid motion and considerations of spin-off and splash, analytical models for both conventional and segmented wheels were developed for predicting the power of pumping coolant into the contact zone. It was rev...

The purpose of this study was to evaluate the effects of early-life exercise on adult physical activity (wheel running, home-cage activity), body mass, food consumption, and circulating leptin levels in males from four replicate lines of mice selectively bred for high voluntary wheel running (High Runner or HR) and their four non-selected control (C) lines. Half of the mice were given wheel acc...