Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486)

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Analysis of peak torque of line-operated synchronous machines subjected to symmetrical voltage sags
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 480-485 - 2002
F. Carlsson, H.-P. Nee, C. Sadarangani
Voltage sags and voltage interruptions are serious power quality problems for many industries. Apart from eventual tripping, voltage sags cause high torque peaks, which may cause damage to the shaft or equipment connected to the shaft. This paper shows how the torque depends on both the duration and the magnitude of voltage sags. First a simple theory is presented, and then to verify the theory, s...... hiện toàn bộ
Effects of external vehicle speed limiting and headway advice on motorway traffic
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 146-150 - 2002
K. Wood, I. Fraser, A. Stevens
The Traffic Responsive Intelligent Speed and Headway Adaptation (TRISHA) project investigated the effects of the external application of limits to the performance of individual vehicles from the roadside. The limits considered were maximum speed and minimum headway based on real-time traffic flow information. The objective of such limits would be to promote smoother traffic flow and better control...... hiện toàn bộ
Journey time estimation using MIDAS loop data
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 177-181 - 2002
N. Abou-Rahme, J. White, R. Stewart
MIDAS (Motorway Incident Detection and Automatic Signalling system) has been operational on a number of motorways as part of the Highways Agency's traffic management system. To verify the accuracy of the existing algorithm for calculating journey times on the M25, video footage and ANPR data, taken from two gantries between Junctions 15 and 16, have been recorded as part of the monitoring of the C...... hiện toàn bộ
Estimation of salt contamination level on the high voltage insulators surfaces during rainy season using artificial neural network
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 303-308 - 2002
A.S. Ahmad, P.S. Ghosh, S.A.K. Aljunid, H. Ahmad
Power system reliability depends mainly on the environmental and weather conditions which cause flashover on polluted insulators. Such flashover leads to system outages. Near the coastal areas the salt contamination can be rapidly built on the surface of the insulators and form a conducting layer by absorbing wet from the mist. This layer in some cases leads to flashover. Study of contamination of...... hiện toàn bộ
Hierarchical management of CDMA network resources
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 216-220 - 2002
W.S. Thong, J. Bigham
The paper describes the use of a layer-based approach to managing CDMA uplink network resources. The aim of the proposed method is to specify an integrated call allocation and admission control algorithm for a CDMA network with the ability to tailor-make solutions based on network load and topology. The paper includes investigations on the use of an auction-based method for the allocation and admi...... hiện toàn bộ
Mobility management in mobile Internet
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 91-95 - 2002
S. Uskela
Efficient mobility management is essential for future communication networks due to the evident trend of increasingly mobile users. A number of mobility management schemes are introduced in the literature. However, there seem to be various definitions of mobility management depending on the context of the problem setting. In this paper, we give a framework that shows how the different definitions ...... hiện toàn bộ
Admission control for different UE-MAC algorithms in UTRA-FDD
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 256-260 - 2002
J. Perez-Romero, O. Sallent, R. Agusti
Radio Resource Management (RRM) entity is responsible for the utilization of the air interface resources in UTRA-FDD and, consequently, the adoption of efficient RRM algorithms is needed to guarantee QoS as well as to provide high capacity. Among the several RRM functions that will help to achieve such objectives, this paper proposes three different MAC strategies applied at UE (User Equipment) le...... hiện toàn bộ
FEM analysis and optimisation design of an IPM synchronous motor
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 49-54 - 2002
N. Bianchi, A. Canova
In this paper, a parameter analysis of an interior permanent magnet (IPM) synchronous motor is presented. After some preliminary design considerations, based on an analytical model, the study is devoted to the evaluation of machine performance as main torque and torque ripple through finite element analysis. A validation of the calculation procedure is performed through experimental results on a p...... hiện toàn bộ
Modelling of wind powered generation in AC power systems
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 335-340 - 2002
A.E. Efthymiadis, A.J.B. Heath, C.A. Lynch, R.D. Youssef, N. Jenkins
This paper outlines a flexible, discrete plant modelling procedure, for all wind turbine generator unit components, including the controllers needed in these systems. The steady state, fault level and dynamic performance of these models have been extensively validated using performance data obtained from electricity supply, oil, marine and general industrial systems.
Reducing torque ripple of transverse flux machines by structural designs
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 320-324 - 2002
G. Kastinger, A. Schumacher
This paper describes the possibility to influence the torque ripple of transverse flux motors by shifting of stator elements. Two structural designs are described which reduce the torque ripple by demanded influence of relative fundamental and harmonic content. These two methods are called "symmetrical shift" and "asymmetrical shift" respectively. The second one offers more degrees of freedom in t...... hiện toàn bộ
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