How to search?
advanced search

Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 6
items per page: 25 50 75
Sort by:

Real-time implementation of an interconnected observer design for p-cells chopper

Kamel Laidi Khalifa Benmansour Abdelaziz Ferdjouni Ouahid Bouchhida
Archives of Electrical Engineering | 2010 | vol. 59 | No 1 - 2 September | 5-20 | DOI: 10.2478/s10171-010-0001-4
Keywords p-cell chopper observer design interconnected observer switching modes
Download PDF Download RIS Download Bibtex

Abstract

This paper deals with an observer design for a p-cell chopper. The goal is to reduce drastically the number of sensors in such system by using an observer in order to estimate all the capacitor voltages. Furthermore, considering an instantaneous model of a p-cell chopper, an interconnected observer is designed in order to estimate the capacitor voltages. This is realized by using only the load current measurement. Simulation results are given in order to illustrate the performance of such observer. To demonstrate the validity of our approach, experimental results based on Digital Signal Processor (DSP) are presented.

Go to article

Authors and Affiliations

Kamel Laidi
Khalifa Benmansour
Abdelaziz Ferdjouni
Ouahid Bouchhida

On the state estimation for nonlinear continuous-time fuzzy systems

Francois Delmotte Mohamed Ali Hammami Nour El Houda Rettab
Archives of Control Sciences | 2022 | vol. 32 | No 1 | 57-72 | DOI: 10.24425/acs.2022.140864
Keywords fuzzy systems Lipschitz analysis observer design
Download PDF Download RIS Download Bibtex

Abstract

A large class of nonlinear systems can be represented or well approximated by Takagi- Sugeno (TS) fuzzy models, which in theory can approximate a general nonlinear system to an arbitrary degree of accuracy. The TS fuzzy model consists of a fuzzy rule base. The rule antecedents partition a given subspace of the model variables into fuzzy regions, while the consequent of each rule is usually a linear or affine model, valid locally in the corresponding region. In this paper, the observer design problem for a T-S fuzzy system subject to Lypschitz perturbation is investigated. First, an observer of Kalman type is designed to estimate the unknown system states. Then, the class of one-sided Lipschitz for a TS fuzzy system subject to a sufficient condition on the bound is studied. The challenges are discussed and some analysis oriented tools are provided. An example is given to show the applicability of the main result.
Go to article

Authors and Affiliations

Francois Delmotte
1
Mohamed Ali Hammami
2
Nour El Houda Rettab
2
  1. University of Artois, Bethune, France
  2. University of Sfax, Faculty of Sciences of Sfax, Tunisia

Discrete-time Takagi-Sugeno singular systems with unmeasurable decision variables: state and fault fuzzy observer design

Khaoula Aitdaraou Mohamed Essabre Abdellatif El Assoudi El Hassane El Yaagoubi
Archives of Control Sciences | 2023 | vol. 33 | No 2 | 321-328 | DOI: 10.24425/acs.2023.146278
Keywords observer design unmeasurable decision variable SVD approach Lyapunov function LMIs
Download PDF Download RIS Download Bibtex

Abstract

The studied problem in this paper, treat the issue of state and fault estimation using a fuzzy observer in the case of unmeasurable decision variable for Discrete-Time Takagi-Sugeno Singular Sytems (DTSSS). First, an augmented system is introduced to gather state and fault into a single vector, then on the basis of Singular Value Decomposition (SVD) approach, this observer is designed in explicit form to estimate both of state and fault of a nonlinear singular system. The exponential stability of this observer is studied using Lyapunov theory and the convergence conditions are solved with Linear Matrix Inequalities (LMIs). Finally a numerical example is simulated, and results are given to validate the offered approach.
Go to article

Authors and Affiliations

Khaoula Aitdaraou
1 2
Mohamed Essabre
3
Abdellatif El Assoudi
1 2
El Hassane El Yaagoubi
1 2
  1. Laboratory of High Energy Physics and Condensed Matter, Faculty of Science, Hassan II University of Casablanca, B.P 5366, Maarif Casablanca, Morocco
  2. ECPI, Department of Electrical Engineering, ENSEM Hassan II University of Casablanca, B.P 8118, Oasis Casablanca, Morocco
  3. Laboratory of Materials, Energy and Control Systems, Faculty of Sciences and Technologies Mohammedia, Hassan II University of Casablanca, Morocco

An observer design for Takagi-Sugeno fuzzy bilinear control systems

François Delmotte Nizar Hadj Taieb Mohamed Ali Hammami Houria Meghnafi
Archives of Control Sciences | 2023 | vol. 33 | No 3 | 631–649 | DOI: 10.24425/acs.2023.146959
Keywords fuzzy systems bilinear systems stability analysis observer design
Download PDF Download RIS Download Bibtex

Abstract

In this paper, the observer design problem for a T-S fuzzy bilinear control system is investigated. First, an observer of Kalman type is designed to estimate the system states for the linear case. Then, some new sufficient conditions are derived to show the exponential convergence of the solutions of the error equation for fuzzy bilinear systems. Furthermore, we consider some uncertainties of the system that are bounded and satisfy a certain condition where an observer is designed. Moreover, an application to Van de Vusse system is given.
Go to article

Authors and Affiliations

François Delmotte
1
Nizar Hadj Taieb
2
Mohamed Ali Hammami
3
Houria Meghnafi
3
  1. University of Artois, Bethune, France
  2. University of Sfax, IPEIS Sfax, Tunisia
  3. University of Sfax, Faculty of Sciences of Sfax, Tunisia

Observer design estimating the propofol concentration in PKPD model with feedback control of anesthesia administration

Muhammad Ilyas Awais Khan Muhammad Abbas Khan Wei Xie Raja Ali Riaz Yousaf Khan
Archives of Control Sciences | 2022 | vol. 32 | No 1 | 85-103 | DOI: 10.24425/acs.2022.140866
Keywords pharmacokinetic and pharmacodynamic models bispectral index monitor observer design sliding mode control
Download PDF Download RIS Download Bibtex

Abstract

Propofol infusion in anesthesia administration requires continual adjustment in the manual infusion system to regulate the hypnosis level. Hypnotic level is based on Bispectral Index Monitor (BIS) showing the cortical activity of the brain scaled between 0 to 100. The new challenging aspect of automation in anaesthesia is to estimate the concentration of hypnotic drugs in different compartments of the body including primary, rapid peripheral (muscle), slow peripheral (bones, fat) and effect site (brain) compartment based on Pharmacokinetics (PK) and Pharmacodynamics (PD) model. This paper aimed to regulate the hypnosis level with estimating the Propofol concentrations using a linear observer in feedback control strategy based on Integral Super-Twisting Sliding Mode Controller (ISTSMC). The drug concentration in plasma of the silico patients accurately estimated in nominal transient. The results show that tracking errors between the actual output in form of BIS level and linearized output nearly approaches to zero in the maintenance phase of anesthesia to ensure the controller response on sliding phase with optimum performances by achieving desired hypnotic level 50 on BIS. The robustness of control strategy is further ensured by adding measurement noise of electromagnetic environment of operation theatre distracting signal quality index of the output BIS level.
Go to article

Authors and Affiliations

Muhammad Ilyas
1
Awais Khan
2
Muhammad Abbas Khan
3
Wei Xie
4
Raja Ali Riaz
5
Yousaf Khan
6
  1. Department of Electrical Engineering, Balochistan University of Engineering and Technology Khuzdar, Pakistan
  2. College of Mechatronics and Control Engineering and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China
  3. Department of Electrical Engineering, Balochistan University of Information Technology, Engineering and Management Sciences, Quetta, Pakistan
  4. College of Automation Science and Technology, South China University of Technology, Guangzhou 510641, People’s Republic of China
  5. Department of Electrical and Computer Engineering, Comsats University Islamabad 45550, Pakistan
  6. Department of Electrical Engineering, Univeristy of Engineering and Technology Peshawar, Peshawar, Pakistan

Practical Mittag-Leffler stability of quasi-one-sided Lipschitz fractional order systems

Imed Basdouri Souad Kasmi Jean Lerbet
Archives of Control Sciences | 2023 | vol. 33 | No 1 | 55-70 | DOI: 10.24425/acs.2023.145113
Keywords fractional-order systems Caputo derivative quasi-one-sided Lipschitz condition nonlinear systems observer design output feedback stabilization separation principle
Download PDF Download RIS Download Bibtex

Abstract

This paper focuses on the global practical Mittag-Leffler feedback stabilization problem for a class of uncertain fractional-order systems. This class of systems is a larger class of nonlinearities than the Lipschitz ones. Based on the quasi-one-sided Lipschitz condition, firstly, we provide sufficient conditions for the practical observer design. Then, we exhibit that practical Mittag-Leffler stability of the closed loop system with a linear, state feedback is attained. Finally, a separation principle is established and we prove that the closed loop system is practical Mittag-Leffler stable.
Go to article

Authors and Affiliations

Imed Basdouri
1
ORCID: ORCID
Souad Kasmi
2
Jean Lerbet
3
  1. Gafsa University, Faculty of Sciences of Gafsa, Department of Mathematics, Zarroug Gafsa 2112 Tunisia
  2. Sfax University, Faculty of Sciences of Sfax, Department of Mathematics, BP 1171 Sfax 3000 Tunisia
  3. Laboratoire de Mathématiques et de Modélisation d’Evry, Univ d’Evry, Université Paris Saclay, France

This page uses 'cookies'. Learn more