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In order to rolling bearing fault diagnosis using vibration signal analysis, this paper presents a new procedure based on the Improved Complete Ensemble Empirical Mode Decomposition ICEMD. In this procedure, firstly, in order to calculate the feature vector, we propose the use a combination of the Improved Complete Ensemble Empirical Mode Decomposition ICEMD and Entropy techniques for determining...
This work deals with a non-linear technique to control a grid connected photovoltaic system. Sliding-Mode Controller (SMC) is proposed to offer a proper and a rapid maximum power point tracking to control the boost converter. To guarantee the SMC stability, three conditions are fulfilled and performed: transversality, reachability and equivalent control. The Sliding-Mode approach is applied also to...
Functional Electrical Stimulation (FES) is a useful technique for restoring functions for patients with neurological disorders. Muscle activities can be artificially driven through delivery of electrical pulses to skeletal muscles. Typically, muscles are activated by using constant stimulation train with a fixed parameters (amplitude, frequency and pulse width). In addition, the FES systems do not...
It is known that propagation across line-of-sight using microwave just fits two adjacent points that are not far apart but not practical for linking two points far apart on Earth This is due to the reason of the curvature of the Earth's surface as required by the need to communicate over long distances. Communication between two points which a fair distance apart on earth surface using two antennas...
Today, the technological development of rehabilitation robots increases very quickly and provides a positive impact to healthcare. The development of the tele-rehabilitation techniques offers more efficiency and high performances for physiotherapy and rehabilitation. In this paper, design and development of a 2DOF wrist rehabilitation robot are proposed. The conceived robot ensures the two sets of...
The work described in this paper presents an original hierarchical protocol based on the Partitioned Binary Search Tree (PBST*). PBST* is a new tree-based scalable distributed data structure. The principal feature of the proposed protocol is the organization of WSN as a balanced tree with one root at the base station (BS). Moreover, the protocol proposes a new technique to avoid the hot spot problem...
Due to their intrinsic characteristics, Ad Hoc mobile networks could be subjects to disturbances or node break-downs. The latter are worsened by the nodes relay and mobility features. A more sophisticated Multihoming integration to MANET networks necessarily increases its robustness: in other words, it improves its performances. That is why we suggest in this article a new extension of the Stream...
Emotion recognition becomes an investigated topic in affective computing for several applications. The presented paper aims to recognize human emotions using peripheral physiological signals as well as electrocardiogram (ECG), galvanic skin response (GSR), Skin Temperature (Temp) and respiration volume (RV). To achieve this purpose, we develop our work with the multimodal database MAHNOB-HCI. The...
We consider the problem of controlling single-phase grid connected photovoltaic system based on a half bridge inverter. The control objectives are threefold: i) Maximum power point tracking (MPPT) of PV system. ii) Unity power factor in the grid. iii) Regulating the output voltage to a desired reference value. The considered problem is dealt with by designing a nonlinear controller using the sliding...
This paper describes a second-order sliding mode control for a permanent magnet synchronous generator-based marine current turbine dealing with the generator-side converter faulty conditions. Marine turbine system mainly used PI controllers. However, this type of controllers is unfortunately very sensitive to faulty conditions as those affect the system converter. In this faulty context, the marine...
Extensive channel data rate, high spectral efficiency, and advanced digital signal processing using state-of-the-art electronics are the main features for next generation optical networks. These technologies are complementary integrated together to develop optical superchannel transmission. This paper demonstrates an optical comb source with variable number of subcarriers and apply reconfigurable...
A cascade high gain observer is designed to estimate the first four leading moments of the crystal size distribution (CSD) and the mean crystal size in batch crystallization processes. The proposed observer is based on a well-known transformation of the partial differential equation describing the CSD to a set of ordinary differential equations (the method of moments). Due to numerical difficulties...
The operation of bearings usually results in a dynamic behavior generating stationary and non-stationary vibration signals mixed with an amount of background noise. Therefore, the condition monitoring of bearings becomes difficult since the purpose is to extract health indicators able to detect the appearance of faults, track their evolution and predict the bearings' remaining useful life. The aim...
The field oriented control (FOC) can provide the same performance as is achieved from a separately excited DC motor. However, this technique requires the mechanic sensor to determine correctly the orientation of the rotor flux vector and is very sensitive to the variation of motor parameters, results in an undesirable coupling between the flux and the torque of the machine, and loss of dynamic performance...
Face recognition became a daily discipline in human life. At the work, with our PDP and smart phones, for our daily help, our security and many other utilities, face recognition has crossed the laboratory doors and colonized the human quotidian. However, the effectiveness of the developed applications still encounters many challenges. The presented work in this paper tries to deal with these challenges...
This paper deals with the design of a Model Predictive Control (MPC) approach for the altitude and attitude stabilization and tracking of a Quad Tilt Wing (QTW) type of Unmanned Aerial Vehicles (UAVs). This Vertical Take-Off and Landing (VTOL) aircraft can take-off and landing vertically such as helicopters and is convertible to the fixed-wing configuration for horizontal flight using a tilting mechanism...
The generalized dynamic inversion (GDI) control methodology for linear state equality constraints (LSECs) enforcement is utilized in partial eigenstructure assignment (EA) on LQ regulators for continuous LTI dynamical systems. The problem is formulated by prescribing a set of LSEC equations that resemble the desired partial eigenstructure of the LQR control system. Applying GDI control on the LSEC...
This paper presents a rotor bars Modeling. The rotor of an Electrical asynchronous machine is modeled by an equivalent electrical diagram related to the squirrel-cage connected together electrically and coupled magnetically, the frequencies characteristics of fault break bars. An intelligent strategy was adopted for fault detection in rotor using the map SOM (Self Organizing Map). It involves the...
Many research groups turn their attention to the concept of Vehicular Ad-Hoc Network (VANET). It allows to establish a sophisticated infrastructure and to provide services during vehicle to vehicle communication (V2V) and vehicle to infrastructure communication (V2I). Hence, vehicles are involved in such services due to their computing capabilities, storage resources, network connectivity, etc. The...
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