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การประชุมวิชาการ

Structural controllability evaluation for heat exchanger networks

ผู้แต่ง:Lersbamrungsuk, V., Dr.Thongchai Rohitatisha Srinophakun, Professor,

การประชุมวิชาการ:

การประชุมวิชาการ

Who Is Willing To Tell The Truth? The Impact of Controllability and Management Experience on Unfavorable Earnings Forecast Disclosures

ผู้แต่ง:Dr.Kanjana Phonsumlissakul, Assistant Professor, Juthathip Audsabumrungrat,

การประชุมวิชาการ:

ผลงานตีพิมพ์ในวารสารวิชาการ

Controllability Studies of Chemical Processes Based on the Concept of Passivity

ผู้แต่ง:Bundit Boonkhao, Dr.Thongchai Rohitatisha Srinophakun, Professor, Rungroat Sirisak,

วารสาร:

ผลงานตีพิมพ์ในวารสารวิชาการ

Three-Input Single-Output Voltage-Mode Multifunction Filter with Electronic Controllability Based on Single Commercially Available IC

ผู้แต่ง:Klungtong, S., Dr.Dusit Thanapatay, Assistant Professor, Jaikla, W.,

วารสาร:

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Controllability Studies of Chemical Processes Based on the Concept of Passivity)

ผู้เขียน:บัณฑิต บุญขาว, ดร.ธงไชย โรหิตะดิษฐ ศรีนพคุณ, ศาสตราจารย์, Rungroat Sirisak

สื่อสิ่งพิมพ์:pdf

Abstract

This article presents an approach on controllability of nonlinear chemical processes based on passivity. The proposed method extents on the concept of Maya-Yescas and Aguilar (2003). The method divides the model system into controllable and uncontrollable parts. A controller can be designed by setting the controllable part equal to zero, so-called the perfect controller. For uncontrollable part, the storage and the supply rate functions are defined by implementing the same perfect controller to analyze the stability. If the uncontrollable part has the Kalman-Yacubovich-Popov (KYP) property, it is guaranteed to be stable and, therefore, the overall system would be controllable. The applications of proposed method are illustrated with two examples: 1) the four available control structures of heat exchanger network for one hot stream and two cold streams; and 2) the two process variables of continuous fermentation. The simulation results imply that the stability and the steady state of uncontrollable part can be considered only as the Lie derivative of a storage function. This technique can be extended to other nonlinear chemical processes as a tool for selecting the best input-output pairing to design the control structure.

Article Info

Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 042, Issue 1, Jan 08 - Mar 08, Page 137 - 148 | PDF | Page