Hassan HAMMOURI

Professeur

  • Systèmes Non Linéaires et Procédés

Observation et commande des systèmes non linéaires


Bureau 1 Université Claude Bernard Lyon 1, bât 308G ESCPE-Lyon, 43 bd du 11 Novembre 1918 G323 Villeurbanne 69622 France

Téléphone bureau 1: 04 72 43 18 95

Bio

 

 

Fault Detection Identification and Isolation via high-gain observer in a Semi Continuous Stirred Tank Reactor

date:2016
références bibliographiques:

Abdelkader, A., Moez Boussada, Koffi Fiaty, and Hassan Hammouri. “Fault Detection Identification and Isolation via High-Gain Observer in a Semi Continuous Stirred Tank Reactor.” 10, no. 1 (April 2016): 2055–61. http://www.sta-tn.com/IJ_STA/Papers/volume_10N1_April_2016/P1_IJSTA_V10N1_SI_AND_16.pdf.
Pages:2055-2061

International Journal of Sciences and Techniques of Automatic control & computer engineering

 

Nonlinear Observer Based on Cascade Form and Output Injection

date:2015
références bibliographiques:

Hammouri, Hassan, and Mariem Sahnoun. “Nonlinear Observer Based on Cascade Form and Output Injection.” 53, no. 5 (2015): 3195–3227. https://doi.org/10.1137/130948483.
Pages:3195-3227

SIAM Journal on Control and Optimization

 

A class of weakly regular Lp-well-posed linear systems

date:2015
références bibliographiques:

Hamid, Bounit, Fouad Maragh, and Hassan Hammouri. “A Class of Weakly Regular Lp-Well-Posed Linear Systems.” 23 (2015): 8–16. https://doi.org/10.1016/j.ejcon.2015.02.001.
Pages:8-16

European Journal of Control

 

On the Admissible Control operators for Linear and Bilinear Systems and the Favard Spaces

date:2014
références bibliographiques:

Maragh, Fouad, Hamid Bounit, Ahmed Fadili, and Hassan Hammouri. “On the Admissible Control Operators for Linear and Bilinear Systems and the Favard Spaces.” 21, no. 4 (2014): 711–32. http://projecteuclid.org.docelec.univ-lyon1.fr/euclid.bbms/1414091010.
Pages:711-732

Bulletin of the Belgian Mathematical Society

 

Forwarding Design with Prescribed Local Behavior

Among the non-linear control techniques, some Lyapunov design methods (Forwarding / Backstepping) take advantage of the structure of the system (Feedforward-form / Feedback-form) to formulate a continuous control law which stabilizes globally and asymptotically the equilibrium. In addition to stabilization, we focus on the local behaviour of the closed loop system, providing conditions under which we can predetermine the behaviour around the origin for Feedforward systems.

date:2013
références bibliographiques:

Benachour, M.S., V. Andrieu, L. Praly, and H. Hammouri. “Forwarding Design with Prescribed Local Behavior.” Early Access Online (2013). https://doi.org/10.1109/TAC.2013.2277632.

IEEE Transactions on Automatic Control

 

Observer Design for Uniformly Observable Systems With Sampled Measurements

This work considers the problem of observer design for continuous-time systems with sampled output measurements (continuous-discrete time systems). In classical literature and in many applications, the continuous-discrete time extended Kalman filter (EKF) is used in order to tackle this problem. In this work, using a normal form characterizing the class of nonlinear uniformly observable single output nonlinear systems, it is shown that a particular stationary solution of a continuous discrete time Lyapunov equation can be used in order to design a constant high gain observer. Explicit conditions are given to ensure global convergence of the observer. Finally, an illustration of this result is given using an example of a biological process.

date:2013
références bibliographiques:

Nadri, M., H. Hammouri, and R.M. Grajales. “Observer Design for Uniformly Observable Systems With Sampled Measurements.” 58, no. 3 (2013): 757–62. https://doi.org/10.1109/TAC.2012.2212517.
Pages:757-762

IEEE Transactions on Automatic Control

 

An observer design for a class of implicit systems

This paper deals with the problem of observer design for a class of implicit nonlinear systems of index one. To solve this problem, an implicit observer which is given by an implicit system is usually used. The implementation of this kind of observer requires an optimization algorithm to solve at each time the algebraic constraints. Alternatively, an explicit observer which is described by an ordinary differential equation can be used. The advantage of this approach is that no optimization algorithm is required. Moreover the observer initialization may be done outside the constraints. In this paper it is shown that, under some conditions, the existence of an implicit observer implies the existence of an explicit one. Then, an explicit observer is given for implicit state affine systems whose dynamic involves an additional nonlinear term depending on the input, the output and the implicit variable.

date:2013
références bibliographiques:

Hammouri, Hassan, and Madiha Nadri. “An Observer Design for a Class of Implicit Systems.” 62, no. 3 (March 2013): 256–61. doi:10.1016/j.sysconle.2012.11.001.
Pages:256-261

Systems & Control Letters

 

Cylindrical heat exchanger trajectory planning and tracking using orthogonal functions

date:2013
références bibliographiques:

Sayem, Hajer, Naceur Benhadj Braiek, and Hassan Hammouri. “Cylindrical Heat Exchanger Trajectory Planning and Tracking Using Orthogonal Functions.” 10, no. 5 (September 1, 2013): 142–49. http://ijcsi.org/papers/IJCSI-10-5-1-142-149.pdf.
Pages:142-149

International Journal of Computer Science Issues

 

Local observer for infinitesimally observable nonlinear systems

In this article, we present a local observer based on infinitesimal observability along trajectories. The gain of this observer derives from a dynamical Lyapunov equation. The inputs for which the observer converges are those which render the system observable at each point of the Ω-limit of the unknown trajectory (infinitesimal observability at infinity along trajectories). The performance of the proposed observer is illustrated with an application to DC machine.

date:2013
références bibliographiques:

Hammouri, Hassan, Hoang Giang Vu, and Hamed Yahoui. “Local Observer for Infinitesimally Observable Nonlinear Systems.” 86, no. 4 (2013): 579–90. https://doi.org/10.1080/00207179.2012.749358.
Pages:579-590

International Journal of Control

 

Observer Design for MIMO Non-Uniformly Observable Systems

The design of high gain observers is usually based on normal forms of observability. If the system is observable for every input (uniform observability), the gain of the observer does not required a solution to differential equation. For multiple input multiple output (MIMO) non-uniformly observable systems, we give here a sufficient condition that the input must satisfy in order to design an observer. Unlike uniformly observable systems, the observer gain of non-uniformly observable systems is derived from a Lyapunov differential equation.

date:2012
références bibliographiques:

Dufour, P., S. Flila, and H. Hammouri. “Observer Design for MIMO Non-Uniformly Observable Systems.” 57, no. 2 (2012): 511–16. doi:10.1109/TAC.2011.2166667.
Pages:511-516

IEEE Transactions on Automatic Control

 

Output feedback stabilization of a one-dimensional wave equation with an arbitrary time delay in boundary observation

The stabilization with time delay in observation or control represents difficult mathematical challenges in the control of distributed parameter systems. It is well-known that the stability of closed-loop system achieved by some stabilizing output feedback laws may be destroyed by whatever small time delay there exists in observation. In this paper, we are concerned with a particularly interesting case: Boundary output feedback stabilization of a one-dimensional wave equation system for which the boundary observation suffers from an arbitrary long time delay. We use the observer and predictor to solve the problem: The state is estimated in the time span where the observation is available; and the state is predicted in the time interval where the observation is not available. It is shown that the estimator/predictor based state feedback law stabilizes the delay system asymptotically or exponentially, respectively, relying on the initial data being non-smooth or smooth. Numerical simulations are presented to illustrate the effect of the stabilizing controller.

date:2012
références bibliographiques:

Guo, Bao-Zhu, Cheng-Zhong Xu, and Hassan Hammouri. “Output Feedback Stabilization of a One-Dimensional Wave Equation with an Arbitrary Time Delay in Boundary Observation.” 18, no. 01 (2012): 22–35. https://doi.org/10.1051/cocv/2010044.
Pages:22-35

ESAIM: Control, Optimisation and Calculus of Variations

 

Model predictive control during the primary drying stage of lyophilisation

During the primary drying stage of pharmaceutical solutions in vial, the sublimation front is the boundary between the dried and frozen layers that moves from the top of the vial to its bottom. While only few on-line measures are available, it is an important variable to control. This paper deals with the on-line partial differential equation model-based predictive control of the sublimation front position, assuming two strategies based on various availability of measurement used in the feedback loop. Through the MPC@CB control software, the robustness of the controller with respect to the main model parameter uncertainty is shown.

date:2010
références bibliographiques:

Daraoui, N., P. Dufour, H. Hammouri, and A. Hottot. “Model Predictive Control during the Primary Drying Stage of Lyophilisation.” 18, no. 5 (2010): 483–94. doi:10.1016/j.conengprac.2010.01.005.
Pages:483-494

Control Engineering Practice

 

Optimal time switching control for multi-reaction batch process

This paper presents an approach for solving minimal time problems for biological batch models with switching controls. Multi-reaction processes operated in a sequence of operating modes are considered, where the control variable is the switch between different operating modes. In order to determine the optimal switching instants that minimize the final time to reach the target, a reachability analysis and a study of dynamical properties are first investigated. This leads to a reduced model and the characterization of reachable switching sequences. Optimization tools are then used to determine the optimal switching instants. Copyright © 2009 John Wiley & Sons, Ltd.

date:2010
références bibliographiques:

Mazouni, D., J. Harmand, A. Rapaport, and H. Hammouri. “Optimal Time Switching Control for Multi-Reaction Batch Process.” 31, no. 4 (2010): 289–301. doi:10.1002/oca.905.
Pages:289–301

Optimal Control Applications and Methods

 

High Gain Observer for Structured Multi-Output Nonlinear Systems

In this note, we present two system structures that characterize classes of multi-input multi-output uniformly observable systems. The first structure is decomposable into a linear and a nonlinear part while the second takes a more general form. It is shown that the second system structure, being more general, contains several system structures that are available in the literature. Two high gain observer design methodologies are presented for both structures and their distinct features are highlighted.

date:2010
références bibliographiques:

Hammouri, H., G. Bornard, and K. Busawon. “High Gain Observer for Structured Multi-Output Nonlinear Systems.” 55, no. 4 (2010): 987–92. doi:10.1109/TAC.2010.2041614.
Pages:987-992

IEEE Transactions on Automatic Control

 

Unknown input observer for state affine systems: A necessary and sufficient condition

The problem of designing an unknown input observer for linear systems and its application to fault detection is widely studied in the literature. For nonlinear systems, only subclasses of nonlinear systems and sufficient conditions have been stated. In this paper an unknown input observer design for state affine systems is considered. Based on the geometric approach, a necessary and sufficient condition is given for the existence of an unknown input observer.

date:2010
références bibliographiques:

Hammouri, Hassan, and Zied Tmar. “Unknown Input Observer for State Affine Systems: A Necessary and Sufficient Condition.” 46, no. 2 (2010): 271–78. doi:10.1016/j.automatica.2009.11.004.
Pages:271-278

Automatica

 

Development of a High Gain Observer for In-Line Monitoring of Sublimation in Vial Freeze Drying

In-line monitoring of the primary drying of the lyophilization process of a pharmaceutical product in vials is addressed in this article. A soft sensor (observer) based on the high gain concept is designed to this purpose. The proposed observer combines the physical measure of the frozen product temperature at the bottom of the vial with a simplified mathematical model of the process. This approach allows the continuous estimation of the entire temperature profile of the product and the monitoring of the state of progression of the primary drying phase. The main issues arising in the design of this observer are discussed. A detailed and experimentally validated mono-dimensional model is used as a source of measured data, in order to compare and validate by means of numerical simulations the results provided by the soft sensor. Finally, the performance of the high gain observer is compared with that of a Kalman filter–based observer previously proposed for the same process, evidencing the advantages of the high gain approach.

date:2010
références bibliographiques:

Velardi, Salvatore A., Hassan Hammouri, and Antonello A. Barresi. “Development of a High Gain Observer for In-Line Monitoring of Sublimation in Vial Freeze Drying.” 28, no. 2 (2010): 256–68. doi:10.1080/07373930903530204.
Pages:256-268

Drying Technology

 

Trajectory Planning and Tracking of Bilinear Systems Using Orthogonal Functions

date:2010
références bibliographiques:

Sayem, H., N. Benhadj Braiek, and Hassan Hammouri. “Trajectory Planning and Tracking of Bilinear Systems Using Orthogonal Functions.” 10, no. 3 (2010): 295–304. http://www.e-ndst.kiev.ua/v10n3.htm.
Pages:295-304

Nonlinear Dynamics and Systems Theory

 

Two Global Stabilizability Results for Homogeneous Systems From a Local Stabilizability Assumption

date:2009
références bibliographiques:

Hammouri, H., and J.-C. Marques. “Two Global Stabilizability Results for Homogeneous Systems From a Local Stabilizability Assumption.” 54, no. 9 (September 2009): 2239–44. doi:10.1109/TAC.2009.2026853.
Pages:2239-2244

IEEE Transactions on Automatic Control

 

New algorithm for observer error linearization with a diffeomorphism on the outputs

date:2009
références bibliographiques:

Boutat, D., A. Benali, H. Hammouri, and K. Busawon. “New Algorithm for Observer Error Linearization with a Diffeomorphism on the Outputs.” 45, no. 10 (October 2009): 2187–93. doi:10.1016/j.automatica.2009.05.030.
Pages:2187-2193

Automatica

 

In-line monitoring of the primary drying phase of the freeze-drying process in vial by means of a Kalman filter based observer

date:2009
références bibliographiques:

Velardi, Salvatore A., Hassan Hammouri, and Antonello A. Barresi. “In-line Monitoring of the Primary Drying Phase of the Freeze-drying Process in Vial by Means of a Kalman Filter Based Observer.” 87, no. 10 (October 2009): 1409–1419. doi:10.1016/j.cherd.2009.03.011.
Pages:1409-1419

Chemical Engineering Research and Design

 

In-line monitoring of the primary drying phase of the freeze-drying process in vial by means of a Kalman filter based observer

This paper is focused on the monitoring of the primary drying phase of the lyophilisation process of pharmaceuticals in vial. Monitoring is required to ensure that the maximum temperature of the product is maintained at a safe value in order to avoid denaturation, and the position of the moving front of sublimation has to be monitored since its evolution gives the state of progression of the primary drying. Furthermore, the information coming from the monitoring system, which includes the estimation of the transport coefficients, can be used in a control loop designed to minimise the drying time beside ensuring product quality.

To this purpose, a soft-sensor (observer) has been developed, based on the extended Kalman filter algorithm: it requires a model of the process (a simplified model is used in order to reduce the computational load) and some physical measurements (in this case the temperature of the product at the bottom of the vial, that can be measured by a thermocouple). The main issues arising in the design of this observer have been discussed. A detailed mono-dimensional model experimentally validated has been used at first to compare the results provided by the observer by means of numerical simulations, and then the results obtained in a pilot freeze-dryer are shown.

date:2009
références bibliographiques:

Velardi, Salvatore A., Hassan Hammouri, and Antonello A. Barresi. “In-Line Monitoring of the Primary Drying Phase of the Freeze-Drying Process in Vial by Means of a Kalman Filter Based Observer.” 87, no. 10 (October 2009): 1409–19. doi:10.1016/j.cherd.2009.03.011.
Pages:1409-1419

Chemical Engineering Research and Design