Skip to main content

A Modified Repetitive Control Strategy for Nonlinear Systems | Chapter 13 | Current Research in Science and Technology Vol. 3

In this research work, a new attempt is made to implement a Modified Repetitive Control Strategy (MRCS) directly in a Liquid Level System (LLS) and indirectly in a Spherical Tank Level System (STLS). The dynamics of the both level processes are described by the worst case model parameters which are identified by influencing the step test method. In direct approach, MRCS is incorporated in the conventional liquid level control loop of proportional (P) mode. Ziegler-Nichols Tuning Rule (ZNTR) based proportional controller parameter is considered in the loop. A periodic signal of sine wave in inflow to the level system is generated and real time runs of the LLS are carried out for the periodic input tracking with MRCS based P mode control loop. In indirect approach, by utilizing relay feedback technique, the periodic reference signal of MRCS is generated. From the input and output chattering signals of the MRCS, the optimized PI controller parameters are identified using Recursive Least Squares (RLS) fitting technique. Real time results are endowed to demonstrate the efficiency of the proposed tuning method. A similar runs are carried out with the non linear systems having conventional PI-mode structure in the both Liquid level and Spherical tank control loops. A comparison in the performance analysis clearly indicates that the incorporation of direct approach of MRCS in the control loop in LLS and indirect approach of MRCS in the control loop in STLS provides a better tracking performance than the conventional PI mode.

Author(s) Details

M. Vijayakarthick
Department of Instrumentation Engineering, MIT Campus, Anna University, Chennai, India.

S. Sathishbabu
Department of Electronics and Communication Engineering, TPGEC, Vellore, India.

P. K. Bhaba
Department of Chemical Engineering, Annamalai University, Annamalainagar, India.

View Books: http://bp.bookpi.org/index.php/bpi/catalog/book/109
Labels:

Comments

Post a Comment

Popular posts from this blog

A Prospective Study about Safety and Efficacy of Perioperative Lidocaine Infusion | Chapter 09 | New Horizons in Medicine and Medical Research Vol. 8

 Opioids cause clinically significant side effects such as respiratory depression, immunosuppression, muscle rigidity, negative inotropism, nausea, vomiting, hyperalgesia, urine retention, postoperative ileus, and drowsiness. Perioperative opioids are a major contributor to the United States' and other countries' opioid epidemics. Non-opioid analgesics, particularly lidocaine, are becoming more common for perioperative use as a result of this. A total of 185 adult patients were randomly assigned to one of two groups: control group I (105 patients) [fentanyl group] or group ii (80 patients) [opioid-free anaesthesia group]. Lidocaine 1.5 mg/kg bolus followed by 1.5 mg/kg/h infusion intraoperatively, and 1.5-2 mg/kg/h infusion for 2-8 hours postoperatively were given to patients in both groups at anaesthetic induction. Intraoperatively, both groups received analgesic adjuvants such as diclofenac 75 mg, paracetamol 1 gm, and mgso4 30-50 mg/kg. If the mean arterial pressure (map)
Post a Comment
Read more

A Brief Study of Middleware Technologies: Programming Applications and Management Systems | Chapter 15 | Novel Research Aspects in Mathematical and Computer Science Vol. 1

  Many platforms, services, applications, hardware, and operating systems are connected through the middleware layer. Because the middleware layer abstracts much low-level complexity and makes applications and software systems portable, it allows disparate systems to interface and function together in harmony. Middleware technologies enable software engineers to swiftly construct software systems and applications, allowing developers to focus on more important tasks. This chapter examines several types of middleware systems and discusses middleware capabilities, middleware operation, middleware's function in cloud-based systems, and the best middleware platforms to use. Middleware systems are widely utilised and can be found in practically any software system or application. Middleware programmes provide as a link between many sorts of systems and protocols. They serve as a mechanism for various systems. To successfully exchange information, it runs on a variety of operating system
Post a Comment
Read more

Patients’ Perspective of Acute Post-operative Pain Management: A Multicentre Survey of Tertiary Hospitals in Maharashtra, India | Chapter 08 | New Horizons in Medicine and Medical Research Vol. 8

 When postoperative pain is adequately controlled, patients' satisfaction and patient-related outcomes (PROs) increase. Understanding the patients' perspective is crucial since it supports in the formulation of improvement strategies. Because wrong attitudes and assumptions might block pain alleviation, patients' attitudes and beliefs are critical. As a result, a multicenter study of patients' attitudes, beliefs, experiences, and satisfaction levels with acute postoperative pain management was done in Maharashtra's tertiary hospitals. In addition, the responses were examined to evaluate if the Acute Pain Service (APS) resulted in improved patient outcomes and satisfaction. A 13-item questionnaire adapted from previous studies was used to capture patients' experiences with postoperative pain treatment. The responses of 179 patients are included in the study. The findings revealed that 91.6 percent of patients experienced postoperative pain, with 75.5 percent
Post a Comment
Read more