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Browsing Dissertation/Theses by Author "Choudhury, Dr. Md. Ali Ahammad Shoukat"

Browsing Dissertation/Theses by Author "Choudhury, Dr. Md. Ali Ahammad Shoukat"

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  • Compensation of control valve stiction 
    Sirajeel Arifin, B.M. (Department of Chemical Engineering (BUET), 2012-08)
    For abstracts please see full text
  • Compensation of control valve stiction 
    Sirajeel Arifin, B. M. (Department of Chemical Engineering (CHE), 2012-08)
    Valve stiction is the hidden culprit of the process control loop. Among all nonlinearities of control valve, stiction has been being one of the major valve problems since the past two decades. Over the last two decades, ...
  • Data-based quantification of process nonlinearity 
    Malik Mohammad Tahiyat (Department of Chemical Engineering (CHE), 2015-08)
    The field of quantification of nonlinearity has drawn much attention from researchers in recent times. However, the scope of research on quantification of nonlinearity, especially for process plants, remains a vast area ...
  • Detection and compensation of control valve stiction 
    Monir Ahammad (Department of Chemical Engineering (CHE), 2012-01)
    Presence of oscillation or large variability in control loops results in decreased economical advantage to process plants due to inferior quality products, larger rate of rejections, reduced average throughputs and overall ...
  • Detection and compensation of dead time in chemical processes 
    Kirtania, Kawnish (Department of Chemical Engineering (CHE), 2011-02)
    Dead time is commonly found in chemical processes. Signi cant amount of dead time can lead to unsatisfactory and unstable process operation. Therefore, dead time estimation and compensation is very important for processes ...
  • Detection of control loop interaction and prioritization of loop maintenance 
    Anisur Rahman (Department of Chemical Engineering (Ch.E), 2011-03)
    In automatic control system of a chemical process, tens or hundreds of control loops are used in a multiloop control con guration. Loop interaction arises in these loops when changes are made in one of the parameters of ...
  • Novel data segmentation methods for data driven process analyses 
    Paul, Rajesh (Department of Chemical Engineering (CHE), 2016-06)
    With the advent of Computer based Control Systems, e.g., Distributed Control System (DCS), process industries are storing huge amount of data everyday. For example, if data is collected at a sampling rate of 4s, there ...
  • Study of plantwide disturbance diagnosis 
    Nahid Sanzida (Department of Chemical Engineering, BUET, 2009-12)
    In the highly complex and integrated chemical process plants, it is a challenge to prevent disturbances from propagating from one unit to other interconnected un'its. Moreover, in today's world chemical process plant ...

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