lecture 10 ENGR 305

lecture 10 ENGR 305 - Lecture 10 ENGR 305 Lecture 10 Themes...

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Unformatted text preview: Lecture 10 ENGR 305 Lecture 10 Themes and elements from control systems Open and closed loops Feedback regulation Feed forward regulation Analogies to biological systems and processes Transcriptional control Lactose operon Arabinose operon Physiological control Homeostasis through antagonistic hormones Bioregulation Cell cycle DNA replication Loss of control regulation Notion of Helical Phasing- Talked about this with Proteins 3.6 residues per turn heptahelical wheel diagram-With Nucleic Acids 10 to 10.5 residues per turn persistence length is 500 (147 bp) Major Minor Major 5 bp 5 bp So, inserting 5 bp changes orientation by 1/2 turn! Collection of interconnected components that can be made to achieve a desired response in the face of external disturbances Open loop Sequence flows in series from one component to next No feedback to command device to indicate load Closed loop Works in circular format, where network of information is continuously informing appropriate components of what to do and what the outcome is Control System I nput Control Element Out put Idea of Feedback Compare actual result with desired result Take actions based on difference Simple idea and tremendously powerful Feedback is key idea in the discipline of control Collection of interconnected components that can be made to achieve a desired response in the face of external disturbances Open loop Sequence flows in series from one component to next No feedback to command device to indicate load Closed loop Works in circular format, where network of information is continuously informing appropriate components of what to do and what the outcome is Control System I nput Control Element Out put Controller System Sensor I nput Out put Controlle r Action Feedback Signal Error +- Concent rate d solution Flow controller Concentration controller Flow sensor Concentratio...
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This note was uploaded on 01/14/2010 for the course ENGR 305 at USC.

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lecture 10 ENGR 305 - Lecture 10 ENGR 305 Lecture 10 Themes...

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