Akihiko Nojima

Development of Toyota in-vehicle equipments for the VICS demonstration test

This paper presents Toyotas new design concept, features, and evaluation results of 3-types in-vehicle equipment which were developed for the VICS demonstration test (1993): Type 1 is a navigation system with dynamic route guidance; Type 2 is a pictorial map display system; and Type 3 is a text display system. We introduce some examples of these displays and describe their detailed features. The Type 1 system has been developed on the basis of our current navigation system with additions of FM-multiplex, microwave-beacon and infrared-beacon receivers. Drivers can get in advance not only the traffic information such as congestion, accidents and so on, but also an optimum route on the full color map display with voice guidance. The Type 2 system can display a simple deformed pictorial map instead of a digital map; it features voice recognition operation and synthesized voice announcement of text data. The Type 3 system has been developed as a part of the audio system; it features a 30-character display and synthesized voice announcement of text data.<<ETX>>

Two-dimensional finite-element method analysis of various antennas for ICRF plasma heating

Two-dimensional finite-element analysis is performed for ion-cyclotron range of frequency (ICRF) antennas with various cross-sectional configurations. Interest is mainly focused on the quantitative difference in the input impedance among various antennas such as the normal loop antenna, the antenna with surrounding limiter walls, and the antenna buried into the cutoff cavity. For analytical simplicity, the cold plasma approximation is used. The numerical results show how the input impedance is affected by the presence of the limiter walls or the cutoff cavity. The code described can be applied to the designs of ICRF antennas with a wide range of plasma parameters and antenna geometries. >