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- Title
- A COMPARISON AND EVALUATIONOFCOMMON PID TUNING METHODS.
- Creator
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Youney, Justin, Haralambous, Michael, University of Central Florida
- Abstract / Description
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The motivation behind this thesis is to consolidate and evaluate the most common Proportional Integral Derivative (PID) controller tuning techniques used in industry. These are the tuning techniques used when the plant transfer function is not known. Many of these systems are poorly tuned because such consolidated information is not easily found in one single source such as this thesis. Once one of the tuning methods are applied almost always there will be further fine tuning needed to bring...
Show moreThe motivation behind this thesis is to consolidate and evaluate the most common Proportional Integral Derivative (PID) controller tuning techniques used in industry. These are the tuning techniques used when the plant transfer function is not known. Many of these systems are poorly tuned because such consolidated information is not easily found in one single source such as this thesis. Once one of the tuning methods are applied almost always there will be further fine tuning needed to bring the system into the required design criteria. The purpose here is to find out which tuning technique will yield the lowest percent overshoot and the shortest settling time for all situations. This will give the engineer a good starting point; to minimally further adjust parameters to achieve the desired design criteria. There will also be discussion on the various algorithms used in industry. Four tuning methods will be evaluated based on their ability to control different style plants. The comparison criteria will be percent overshoot and settling time for an applied step input. The tuning methods chosen were the Ziegler-Nichols Open Loop method, the CHR method for 0% overshoot, the Ziegler-Nichols Closed Loop method, and the Rule of Thumb method. It is shown that for a second order plant with a lag and pure integration in its transfer function, the Open Loop method yielded the lowest results in terms of percent overshoot, yet the Closed Loop method had the shortest settling time. For systems of higher order than two it was shown that the CHR method gave the best performance however as the order increased the Closed Loop method gave a shorter settling time. For systems of higher order with varying lags in series the CHR method gave the best results. The Rule of thumb method usually gave similar results to that of the Closed Loop method; however for higher order systems the Rule of Thumb method gave less percent overshoot but with a longer settling time than the Closed Loop method. Since these tuning methods are used when the plant transfer function is not known, and none of the rules were found to give consistently the lowest percent overshoot, and settling time for all plants tested, there can not be a recommendation as to which method an engineer should choose to use. If the plant transfer function is known or can be reasonably modeled then the following recommendations can be followed. When tuning systems with pure integrations in their transfer function the Open Loop or Closed Loop method be used. When tuning systems of order higher than two the CHR or Closed Loop method should be used, however with high order systems with varying lags the CHR method should be used. It is the responsibility of the engineer to know how and when to implement each of the tuning rules properly.
Show less - Date Issued
- 2007
- Identifier
- CFE0001716, ucf:47301
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001716
- Title
- NASCAR RESTRICTOR PLATE EXHAUST MANIFOLD DESIGN STRATEGIES.
- Creator
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Dollhopf, Matthew John, Hoekstra, Robert, University of Central Florida
- Abstract / Description
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This paper presents the results of a study on exhaust manifold design for a NASCAR Restrictor plate internal combustion engine. A computer simulation model was developed using Ricardo WAVE software. WAVE is a computer-aided engineering code developed by Ricardo to analyze the dynamics of pressure waves, mass flows and energy losses in ducts, plenums and the intake and exhaust manifolds of various systems and machines. The model was validated against experimental data from a current NASCAR...
Show moreThis paper presents the results of a study on exhaust manifold design for a NASCAR Restrictor plate internal combustion engine. A computer simulation model was developed using Ricardo WAVE software. WAVE is a computer-aided engineering code developed by Ricardo to analyze the dynamics of pressure waves, mass flows and energy losses in ducts, plenums and the intake and exhaust manifolds of various systems and machines. The model was validated against experimental data from a current NASCAR Winston Cup restrictor plate motor. The parameters studied have been exhaust manifold diameters and lengths. A response surface analysis of the simulation output followed.The analysis of results shows the design parameters of the existing exhaust manifold are not optimized. The findings from these studies are used to derive exhaust system design guidelines which define optimum exhaust system geometry to maximize average Brake Horsepower over a given powerband for a restrictor plate NASCAR engine.
Show less - Date Issued
- 2004
- Identifier
- CFE0000082, ucf:46087
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000082
- Title
- Emotional Labor and Identity Management Among HIV Counselors and Testers.
- Creator
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Caldwell, James, Anthony, Amanda, Donley, Amy, Gay, David, University of Central Florida
- Abstract / Description
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Emotional labor, an idea first developed by Arlie Hochschild, became a main component of work developing the field of sociology of emotions. Emotion labor provides a conceptual framework for understanding the outward and inward emotional experiences that are deemed either appropriate or inappropriate during interactions with others, specifically in the workplace. A product and derivation of this emotional labor is carefully outlined display rules. These rules vary from position to position,...
Show moreEmotional labor, an idea first developed by Arlie Hochschild, became a main component of work developing the field of sociology of emotions. Emotion labor provides a conceptual framework for understanding the outward and inward emotional experiences that are deemed either appropriate or inappropriate during interactions with others, specifically in the workplace. A product and derivation of this emotional labor is carefully outlined display rules. These rules vary from position to position, but are often part and parcel of work in the human services sector. This labor can be understood as resulting from the employee's adherence to display rules, which may or may not match the employees' organically felt or perceived emotions at the time. The current study draws from these conceptual frameworks and emotion work typologies introduced by Arlie Hochschild to analyze in-depth, the emotional labor performed by HIV Testers; this study does so through the analytical categories of Bodily Emotion Work, Expressive Emotion Work, and Cognitive Emotion Work. While the current study upholds many conclusions of prior research related to human services, and high rates of emotional labor, this study contributes through introducing the term Emotional Tuning. As based in the dynamic of emotional labor existing between HIV Testers and the patients that they serve, this study puts forth the term Emotional Tuning as the process of one individual scanning or reviewing the emotional state of another. The individual then acts accordingly, based on their interpretation of the other's emotional state, to help influence that emotional state, typically by matching or contrasting with that emotional state. This research contributes by expanding on prior research of emotion work and emotion labor through the specific field of client-based counseling, as there is no known prior research that has delved specifically into the work performed by HIV Testers and the rich experiences had by those delivering HIV results and sexual education, particularly as the emotional labor being studied is not commodified. Such topics as HIV status and sexual health education have been, even recently, overshadowed by stigma. Many Testers in the current study found HIV work to be both the hardest and most rewarding experience of their life. The current study looked closely at the effect that this emotional work had on both the testers interviewed, and the patients they serve and has broad implications for both tester training and client support initiatives.
Show less - Date Issued
- 2016
- Identifier
- CFE0006274, ucf:51036
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006274
