Monk, John, 1943- (1970) Application of digital computers to on-line optimisation. PhD thesis, University of Warwick.

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Abstract

This thesis is concerned with hill climbing systems which may be used for parameter optimisation. A simple system is described which uses the slope of the cost function to approach the zero slope condition corresponding to a unique optimum of a system characteristic. A theoretical analysis using estimation theory methods is applied to a range of waveforms to assess their value in slope estimation in the presence of disturbances and system irregularities. The principal signals discussed are two and three level maximal-length sequences and square waver. Sinc waves are used for comparison purposes. More complex optimisers using higher order models of the cost function are also considered with particular reference to the use of the special properties of three level maximal-length sequences. The results of the theoretical studies are confirmed by a series of experiments using an internal combustion engine test rig and a description of the preparation of the test rig is given. Hill climbing was carried out on the ignition angle to obtain maximum power at full throttle and trajectories for the hill climbing signals are shown.

Item Type:	Thesis or Dissertation (PhD)
Subjects:	Q Science > QA Mathematics
Library of Congress Subject Headings (LCSH):	Mathematical optimization -- Computer programs, Estimation theory -- Computer programs, Internal combustion engines -- Mathematical models
Date:	December 1970
Institution:	University of Warwick
Theses Department:	School of Engineering
Thesis Type:	PhD
Publication Status:	Unpublished
Extent:	[188] p.
Language:	eng
URI:	http://wrap.warwick.ac.uk/id/eprint/39027

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