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Active tracking of rotational mode heliostat

Active traclung methods for rotational mode heliostat invented by Prof. Dr. Y. T. Chen recently, are proposed in this thesis. This is to provide an alternative tracking method for Non-Imaging Focusing Heliostat (NIFH) designed by UTM that is simple and cost effective, with reasonable performance. Th...

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Main Author:	Tan, Boon Kok
Format:	Thesis
Language:	English
Published:	2004
Subjects:	TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/8011/1/TanBoonKokMFKE2004.pdf http://eprints.utm.my/id/eprint/8011/ http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:11547
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spelling	my.utm.80112018-09-19T05:07:16Z http://eprints.utm.my/id/eprint/8011/ Active tracking of rotational mode heliostat Tan, Boon Kok TK Electrical engineering. Electronics Nuclear engineering Active traclung methods for rotational mode heliostat invented by Prof. Dr. Y. T. Chen recently, are proposed in this thesis. This is to provide an alternative tracking method for Non-Imaging Focusing Heliostat (NIFH) designed by UTM that is simple and cost effective, with reasonable performance. The newly developed methods consist of two parts: primary tracking and secondary tracking. For primary tracking, a sensor plane, which is built up of a gnomon surrounded by eight photo-detectors, is used to detect the deviation of incident angle of incoming sunray. In principle, the normal of the sensor plane should always point towards the direction of the sun. The displacement of the incoming sunray will be sensed by comparing the intensity difference of the photodetectors, as the gnomon will cast a shadow onto a portion area of photo-detectors' surface. The proposed tracking method is autonomous and stand-alone. The entire sensing and motor-controlling task is performing by using a simple electronic circuit, attached on the body of the heliostat. No complicated computer software control is needed. In addition, open-loop clock-like signal will be fed into the system to fbther increase the speed of error compensation and for better stability performance. For 8 secondary tracking, the use of mechanical cam drive by consistent clock is proposed. From the study of NFH's tracking equation, a high-precision mechanical cam is proposed to compensate the aberration of slave mirror throughout the tracking day. The merits of these methods are the larger range of dynamic range for the sensors and their simple designs. 2004-07 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/8011/1/TanBoonKokMFKE2004.pdf Tan, Boon Kok (2004) Active tracking of rotational mode heliostat. Masters thesis, Universiti Teknologi Malaysia, Faculty of Electrical Engineering. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:11547
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
language	English
topic	TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	TK Electrical engineering. Electronics Nuclear engineering Tan, Boon Kok Active tracking of rotational mode heliostat
description	Active traclung methods for rotational mode heliostat invented by Prof. Dr. Y. T. Chen recently, are proposed in this thesis. This is to provide an alternative tracking method for Non-Imaging Focusing Heliostat (NIFH) designed by UTM that is simple and cost effective, with reasonable performance. The newly developed methods consist of two parts: primary tracking and secondary tracking. For primary tracking, a sensor plane, which is built up of a gnomon surrounded by eight photo-detectors, is used to detect the deviation of incident angle of incoming sunray. In principle, the normal of the sensor plane should always point towards the direction of the sun. The displacement of the incoming sunray will be sensed by comparing the intensity difference of the photodetectors, as the gnomon will cast a shadow onto a portion area of photo-detectors' surface. The proposed tracking method is autonomous and stand-alone. The entire sensing and motor-controlling task is performing by using a simple electronic circuit, attached on the body of the heliostat. No complicated computer software control is needed. In addition, open-loop clock-like signal will be fed into the system to fbther increase the speed of error compensation and for better stability performance. For 8 secondary tracking, the use of mechanical cam drive by consistent clock is proposed. From the study of NFH's tracking equation, a high-precision mechanical cam is proposed to compensate the aberration of slave mirror throughout the tracking day. The merits of these methods are the larger range of dynamic range for the sensors and their simple designs.
format	Thesis
author	Tan, Boon Kok
author_facet	Tan, Boon Kok
author_sort	Tan, Boon Kok
title	Active tracking of rotational mode heliostat
title_short	Active tracking of rotational mode heliostat
title_full	Active tracking of rotational mode heliostat
title_fullStr	Active tracking of rotational mode heliostat
title_full_unstemmed	Active tracking of rotational mode heliostat
title_sort	active tracking of rotational mode heliostat
publishDate	2004
url	http://eprints.utm.my/id/eprint/8011/1/TanBoonKokMFKE2004.pdf http://eprints.utm.my/id/eprint/8011/ http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:11547
_version_	1643644902004752384
score	13.211869

Active tracking of rotational mode heliostat

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