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Many industrial processes are multivariable. There-fore, it is necessary to synthesis a robust control for this type of systems. In this paper, a discrete second order sliding mode control for decouplable multivariable systems is proposed via input-output models. The proposed control is synthesized to overcome the chattering problem. Simulation results are presented to illustrate the efficiency of...
The present study deals with fractional modeling and identification of non-integer systems by least squares method (LS). Identification of fractional differentials equations (FDE) is investigated when estimating system parameters by a linear model with respect to parameters, as well as non-integer orders from temporal data (Hn1, n2 model). Estimated parameters by LS method will be used for initialization...
This paper deals with modeling, based on magnetic equivalent circuit (MEC), of a linear actuator intended for the control of electromagnetic valves. Adopted technique uses a permeance network obtained through meshing considered topology with 2D elementary blocks. Such technique permits to take into account the saturation behavior of ferromagnetic materials composing actuator elements. Force applied...
In this paper we present a method for prediction and trajectory tracking of a set of vehicles operating in a port. The objective is to enable the prediction of risk situations in order to avoid collisions. The system is designed for high traffic areas located in ports or civil engineering projects, environments in which traffic occurs without structured lanes of movement. While many studies have been...
This paper presents a nonlinear control of a synchronous permanent magnet machine based on second order sliding mode control using super twisting algorithm. This algorithm allows to reduce the chattering phenomenon. Simulation results are presented to show the effectiveness of the proposed control method.
Many researchers were used the additive method of digital watermarking images which we quote for example Anuradha and Rudresh Pratap Singh (2006) [1]. However, this paper proposes an additive watermarking method by invoking Particle Swarm Optimization (PSO) technique in wavelet domain to improve this scheme of watermarking. To avoid that the watermarking lose its robustness and imperceptibility and...
A direct sensor to actuator communication model for Ethernet-based Networked Control Systems (NCSs) is presented in this paper. This model is compared to a previously introduced model including an in-loop controller node. OMNET simulations showed the success of the presented model in meeting system delay and strict zero packet loss (with no over-delayed packets) requirements. The model also showed...
The paper describes an analytical method which is developed for the modeling of cage induction motors (IM) including space and time harmonics effects. This model is used to predict the influence of these harmonics on the electromagnetic performances of IM drives in healthy condition and to extract significant signatures under faulty conditions such as unbalanced supply voltage. The equations which...
This paper introduces a certain set of algorithms that were implemented in a specific environment (MATLAB) to calculate the Global System for Mobile (GSM) planning parameters, which address the functionality of the coverage and capacity in GSM. Moreover, these key planning parameters are divided into two major parts first; Network parameters, which includes (Signal to interference ratio, Grade of...
In the most of industrial and domestic applications bearings present important assets. The diagnostic of these elements needs accurate and reliable acquisition of its dynamic vibration signals affected by noise and other part of system such as gears, bars... Empirical Mode Decomposition (EMD) is a new signal processing method used to decompose non-stationary and non-linear vibration bearing signals...
The work reported in this paper deal with of Finite Impulse Response FIR digital filter design by using window method. The window method is easiest to design FIR, but lacks flexibility especially when the passband and stopband ripples are different. The digital filter is used to filter discrete time signals with the ability to modify the frequency response of the filter at any time and it used in...
This paper deals with a Luenberger observer for a class of Takagi Sugeno (TS) descriptor systems. This kind of systems represents many fields as chemical, robotics and electrical systems. A new approach is used to study the stability analysis of the Takagi Sugeno descriptor observer system. The state estimation error leads to formulate linear matrix inequalities (LMIs) which solve the observer gains...
This paper, present Pizer hash function based on elliptic curve and expander graph. First it describes how a Pizer hash function is used to hash a message. then, it presents the different steps to sign a message, already hash with Pizer hash function, using Elliptic Curve Digital Signature Algorithm (ECDSA). Finally, examples and results have been elaborated under the MATLAB environment and an explication...
A new patented control algorithm achieves an optimized performance of the time response while preserving all the advantages that high gain feedback offers in terms of stability margins and robustness without having to worry about a risk of oscillations or instability. The algorithm is applied to stable invertible systems and is based on the quasi-linear principle i.e. the poles of the controller depend...
This study develops a model for the design of a solar dish concentrator in order to be operated with a given data of environmental conditions, such as Tunisian conditions and the technical documentation of Stirling engine chosen to be used. A numerical validation of the mathematical and thermal model of the receiver is made based on experimental measurements reported for the CNRS-PROMES EURODISH system...
This paper proposes a two-stage recursive least squares algorithm for output error models. systems are considered multiple-input single-output, which is represented by autoregressive models. The first step of the proposed algorithm is to identify algorithm model. Second one is to implement these identification methods at thermal power plant, whose nominal power output is 320 MW. The water level measurements...
Network-on-chip architectures can improve the scalability, performance, and power efficiency of general multiprocessor systems and application-specific heterogeneous multicore and many-core SoCs (MCSoCs). This interconnection paradigm when combined with 3D integration technology offers advantages over 2D NoC design, such as shorter wire length, higher packing density, and smaller footprint. However,...
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