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[ pdf ] A SIMPLE EVENT-BASED PID CONTROLLER

A SIMPLE EVENT-BASED PID CONTROLLER Download
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Source: www.control.lth.se 
File size: 102.33 KB
File type: pdf
Last download on: Thu Apr 12, 2018 01:54:59 AM
Short Desciption:
Abstract: A simple event-based PID controller is presented. It is shown that it is possible to obtain large reductions in CPU utilization with only minor control performance degradation. Simulations on a double-tank process are presented. Keywords: PID control, computer control, event-based sampling

Summary:
A simple event-based PID controller has been presented. It has been shown through simulations that it is possible to obtain large reductions in the CPU utilization with only minor control performance degradation. It has also been shown that it is important to take the varying sampling interval into account in the control algorithm. The proposed controller has also been tested on a laboratory tank process with good results. A problem with event-based control is that it becomes harder to verify and guarantee worst-case performance using, e.g., available scheduling theory, and that it is difficult to analyze the control system. Hence, there is a strong need for both a system theory for event-based control and for new results in scheduling.
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