Land Rover

About: Land Rover is a based out in . It is known for research contribution in the topics: Nonlinear system & Torque. The organization has 117 authors who have published 127 publications receiving 2297 citations.

Stabilisability and detectability in networked control

Abstract: The authors reconsider and advance the analysis of controllability and observability (and the weaker stabilisability and detectability properties) of a class of linear networked control systems (NCSs). The authors model the NCS as a periodic system with limited communication where the non-updated signals can either be held constant (the zero-order-hold case) or reset to zero. Periodicity is dealt with the lifting technique. The authors provide conditions for controllability (stabilisability) and observability (detectability) of the NCS, given a communication sequence and the controlled plant model. These conditions allow to find communication sequences which are shorter than previously established. A strict lower bound for the sequence length is given. In the sampled-data case, the authors prove that a communication sequence that avoids particularly defined pathological sampling rates and particular eigenvalues can preserve stabilisability (and detectability for the dual problem) with a ‘minimum’ sequence length.

Wheel position indicator

Abstract: A wheel position indication system for a vehicle comprising a steerable wheel, a wheel position indicator and a controller. The wheel position indicator has an on state and an off state. The wheel position indicator provides a visual indication of the position of the steerable wheel when the wheel position indicator is in the on state. The wheel position indicator does not provide a visual indication of the position of the steerable wheel when the wheel position indicator is in the off state. The controller selectively alters the wheel position indicator between the on state and the off state. The controller places the wheel position indicator into the on state when the vehicle is in a predetermined driving condition and places the wheel position indicator into the off state when the vehicle is not in the predetermined driving condition.

Thermal Spraying of Cylinder Bores With the PTWA Internal Coating System

Abstract: A major goal for the automotive industry over the next years is the reduction in CO2 emissions. This can be accomplished by reducing fuel consumption for new production vehicles and by increased remanufacturing of old worn engines. Both of these objectives can be addressed with the use of PTWA (Plasma Transferred Wire Arc) thermal spray of cylinder bores. Key factors in this development relating to new production engines focus on the reduction in overall vehicle weight and also the improvement of engine efficiency by reducing the internal friction losses. Substantial weight savings can be achieved with the use of aluminum engines. However, most aluminum engines require cast iron liners to be used as the wear surface. Additional weight savings and potential friction reduction can be achieved by replacing these heavy cast iron liners with a low friction, wear resistant PTWA coatings on the cylinder bores. In addition to being applied to new engines for automotive production, this same process can also be used to repair worn cylinder bores in both aluminum and cast iron engine blocks. This technology makes it possible to salvage engine blocks that would otherwise be scrapped. In addition, PTWA thermal spray can be used to reduce costs for engines that are already remanufactured using expensive over-sized pistons. With reduced costs and salvaging previously scrapped components, the use of the thermal spray technology can increase the amount of remanufacturing for critical engine components. The reduced CO2 emissions results from remanufactured components requiring 50% to 80% less energy to produce than the new production manufactured equivalents [1].Copyright © 2007 by ASME