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UBC Theses and Dissertations
Integration of manufacturing process control and optimization with a general purpose multi-processor controller Ardekani, Ramin
Abstract
The objective of this thesis is to demonstrate the importance of control software and hardware design in economic optimization of a production process. It is proposed that the improvement in production economics depends on the system's ability to meet the needs of a process model formulated from a sound understanding of the process. To illustrate these concepts, an NC lathe machining language is created to exploit the UBC Controller's ability for reducing production cost, ensuring part quality and improving machining safety, all based on the guidelines from a practical process model. The language uses a feature based approach to part geometry definition which simplifies data entry and operation planning. The tool path is automatically generated for volume primitives and sent to the controller with process control information. Unlike other systems, which are restricted by the traditional NC code block format in communicating process information to the controller, the process data can be made to correspond with small motion increments and help the controller cope with the expected variations in cutting conditions due to the cut geometry. Experiments with a force monitoring scheme demonstrate how a simple algorithm can keep the force within the prescribed limits for machining safety and product quality. Implementation of a rudimentary process identification and optimization scheme shows the system's ability to reduce machining cost while observing the practical constraints. This low cost system is intended to allow smaller firms to benefit from the current level of process knowledge and production technology.
Item Metadata
Title |
Integration of manufacturing process control and optimization with a general purpose multi-processor controller
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1992
|
Description |
The objective of this thesis is to demonstrate the importance of control software and
hardware design in economic optimization of a production process. It is proposed that the
improvement in production economics depends on the system's ability to meet the needs of a
process model formulated from a sound understanding of the process. To illustrate these
concepts, an NC lathe machining language is created to exploit the UBC Controller's ability
for reducing production cost, ensuring part quality and improving machining safety, all based
on the guidelines from a practical process model. The language uses a feature based approach
to part geometry definition which simplifies data entry and operation planning. The tool path
is automatically generated for volume primitives and sent to the controller with process
control information. Unlike other systems, which are restricted by the traditional NC code
block format in communicating process information to the controller, the process data can be
made to correspond with small motion increments and help the controller cope with the
expected variations in cutting conditions due to the cut geometry. Experiments with a force
monitoring scheme demonstrate how a simple algorithm can keep the force within the
prescribed limits for machining safety and product quality. Implementation of a rudimentary
process identification and optimization scheme shows the system's ability to reduce machining
cost while observing the practical constraints. This low cost system is intended to allow
smaller firms to benefit from the current level of process knowledge and production
technology.
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Extent |
3317818 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2008-12-12
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0080852
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1992-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.