The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In order to minimize the size and improve the efficiency of power consumption, most of wireless implantable Microsystems use Amplitude Shift Keying (ASK) modulator to transmit, through a RF link, data and energy to the internal implants. In this paper, we propose a new structure of wireless data and clock recovery dedicated for biomedical implants. It consists in a fully integrated ASK demodulator...
The aim of this work is to determine the frequency of an UWB (Ultra Wind Band) wave at which the wave can cross the biological tissue with limited losses and deformation. The biological tissue which is characterized by its thickness, its relative dielectric constant and its conductivity, is a sample of fat, localized at a distance of the antenna source which guarantees the inexistence of the attenuation...
This paper provides some new developments in the design of robust local unknown input observers for nonlinear systems based on first order Taylor approximation. The necessary and sufficient conditions for the existence of the observer are given. A numerical example is given to illustrate the attractiveness and the simplicity of the new design procedure.
Correlation power analysis is the well-known attack against cryptographic modules. An attacker exploits the correlation between the power consumed by a device and the data being processed. In the present paper, we present the experimental procedure of correlation power analysis using three different devices: FPGA, ASIC and a microcontroller. Results show that the power model used to calculate hypothetical...
Strain gauges and Wheatstone bridges constitute the basic instrumentation for electrical measurement of non-electrical quantities. After presenting the fundamental properties of the resistive strain gauge and the (un)balanced Wheatstone bridge, a significant diversity of measurement techniques and means are described, typical for the present-day worldwide instrumentation. Among them: classical (metallic)...
In this paper finite-time stabilization of nonlinear affine systems, is considered. First we provide a formula for a finite-time stabilizing state feedback control law, for the last class of system. Then we extend the result to the case of a norm-bounded uncertain system and a polytopic uncertain system stabilization are given. Some numerical examples are given to illustrate the main result.
The multi-machines system is intensively used in several industrial applications. When a fault occurred in one machine, it is very difficult to identify which one is affected by the fault. Therefore, this paper presents an efficient method to locate the faulty machine in dual induction motors supplied by a single inverter. The treated system is composed by two induction motors fed by a PWM voltage...
This paper presents a new scheme for induction motor control. First the feedback sliding mode linearization control is applied to induction motor in order to separate the control of the rotor speed and flux square. Once the two physical outputs reach their reference, the machine control is performed by an H∞ controller. We detail, in this paper, how to design the H∞ controller to guarantee the robust...
This article presents analytical expressions for the electromagnetic parameters (characteristic impedance (Zc), inductance (L] and capacitance (C)) of micromachined shielded membrane microstrip line (SMM). The analytical expressions can be deduced from rigorous analyses using method of moments (MoM) analysis and curve-fitting techniques. An analysis can be readily implemented in modern CAE software...
In this paper, a two-level reconfiguration action is used to design an Active Fault Tolerant Control (AFTC) system. The first level of the procedure is triggered when the impact of the fault on the system performance is limited. The reconfigurable controller is updated by the new post-fault system model. At the second level a dynamic reference modification based on Reference Governor (RG) is proposed...
In recent years, as SoC design research is actively conducted, a large number of IPs are included in one system through network on chip. The real effort and time in using NoC is spent in developing network interfaces (NI) for connecting cores to the NoC. The area and power of NIs should be small and its latency must be kept as low as possible. To reduce power dissipation NIs, we suppose to employ...
The purpose of this paper is to provide new methods for neutral system stability and diagnosis analysis. Based on Kharitonov stability, a new theorem is proposed for delay neutral system with robust control. For stabilized neutral system, an unknown input observer with new structure is then investigated to diagnosis this type of system. Tow important conditions are presented to can apply this type...
Sensorless techniques have got considerable importance in IPMSM drives researches. In the two past decades, a number of High Frequency Signal Injection (HFSI) techniques have been proposed and developed for IPMSM rotor position estimation at standstill and low speed. These techniques are divided into transient signal injection techniques, which are based on exploiting the PWM signal to extract the...
For a wireless sensor node of an overhead power line monitoring system a power module was developed using the electrostatic field around the conductor to supply the sensor system. Special requirements in functionality, reliability and the limited accessibility at the power line result in the development of a specific energy management strategy. First prototypes of the power module were realized and...
Recent advances in sensor and wireless radio frequency (RF) technologies offer vast opportunities for development and application of sensor systems for agriculture. It is the concept of precision agriculture, where Wireless Sensor Networks (WSN) is playing an important part in the handling and managing of water resources for irrigation, in understanding the changes in the crops to assess the optimum...
The aim of the paper is to assess the feasibility of impedance measurements for meat aging detection. The carried investigations are dedicated to the aging of the meat of beef. An investigation was carried out for the detection of the age of meat using 2 cases of storage in the fridge, unpacked meat, exposed in the air of the fridge (Up) and vacuum-packed meat, conserved in closed box (Vp). The measurements...
This article describes the prototype of the digital communication system based on the XBee module. It consists on a universal system that transmits all type of data including the medical information such as Electrocardiogram (ECG). To validate this system, we have chosen to transmit the ECG from a computer to another through the XBee modules just to evaluate the quality of the wireless communication...
This paper is devoted to the stability analysis of uncertain nonlinear dynamic systems. The generalized polynomial chaos formalism is proposed to deal with this challenging problem treated in most cases by using the prohibitive Monte Carlo based techniques. Two equivalent methods combining the non-intrusive generalized polynomial chaos with the indirect Lyapunov method are presented. Both methods...
This paper presents a Digital Signal Processor (DSP) based real time digital emulation model for single phase controlled DC/AC distributed generation system. A DC/AC converter with LC filter fed resistive load are implemented on the DSP. The digital emulation model also includes a multi-loop control to achieve the real-time emulation of the complete distributed generation system. All models have been...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.