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Most of the physical-layer authentication methods are based on the pre-knowledge of the channel information and the threshold is fixed before the communication process. In this paper, we propose a physical layer authentication method based on channel information and machine learning with a dynamic threshold in wireless communication environment. In this method, the threshold of the channel differences...
This paper is presenting Finite Element Tearing and Interconnecting (FETI) simulation results of large scale Ka-band lens transmit-arrays obtained on massively parallel clusters. The computation times observed with the FETI method allow us to consider using it in the optimization phase of such transmit-arrays.
A kind of low sidelobe and high gain microstrip antenna array with 32×8 units operating in the X-band is designed, which achieves the gain of 28 dBi and the sidelobe level of −25 dB at 9.37 GHz. The Chebeshev distribution is used in designing the current distribution on the surface of this antenna, which achieves a width of main lobe of 5° in E-plane and a main lobe width of 10° in H-plane. The amplitude...
Cooling systems consume around 40% of modern data centres' total energy consumption, thus reducing the energy waste in this sector will have positive environmental impact. There exist several cooling methods appropriate for particular conditions. Since environmental conditions, such as air temperature, change on seasonal bases, no single cooling method can be claimed to be the best. In contrast, data...
This paper presents a new configuration of an off-grid single-phase generator using a three-phase induction machine. The use of this kind of machine, cheap and robust, is in line with the “jugaad” philosophy, better known as frugal innovation. In such an application, three-phase induction machines are usually operated as stand-alone single-phase generator which are either self-excited using terminal...
An average power sharing control strategy for parallel operation of voltage source inverter (VSI) based modular Uninterruptible Power Systems (UPSs) is proposed in this paper. The presented method is based on a modified droop control. The proposed method conquers the drawback of conventional droop plus virtual impedance control, and at the same time some challenges in the real applications have been...
Indirect rotor field oriented control (IRFOC) plays an important role in the high performance induction machine drives. In the indirect rotor field oriented control — based induction machine adjustable speed control system, the rotor field angle is usually obtained by the rotor angular velocity and the slip angular velocity. The rotor angular velocity can be sensed by an encoder with sufficient accuracy...
The connection of business processes along the value chain and the integration of the production system with business process are two cornerstones of Industry 4.0. The Industry 4.0 Demonstration Production Line (DPL) located at Shenyang Institute of Automation (Shenyang) is a prototype smart factory that implements end-to-end customized production. It is also a testbed for intelligent manufacturing...
The paper firstly establishes a passivity-based control (PBC) of a double-fed inductor generator (DFIG). A new control method of the DFIG is proposed with the outer speed loop controlled by a full-order terminal sliding mode (TSM) controller to undertake maximum wind power point tracking (MPPT), while the inner current control loop is a PBC designed to manage the three-phase PWM rectifier. Simulation...
Up to now the quadruped robots are equipped with the trunks which are rigid bodies or consist of two blocks connected by passive joints. This paper proposes a metamorphic quadruped robot with a moveable trunk which can implement active trunk motions, called MetaRobot I. Its trunk is constructed by a planar 6-bar linkage. Due to this linkage, it can change its trunk into multiple shapes, which give...
Permanent magnet synchronous motor (PMSM) drives include several design and control variables that affect power losses. The improvement in system efficiency through control techniques will reduce the size of inverter and motor cooling system as well as the operating costs of the system. This paper proposes a comprehensive analysis of loss controllability using various control parameters to reduce...
A quad-band energy harvester is proposed here. The harvester is formed of rectifiers and matching circuits at different frequency bands: GSM-900 (890-960 MHz), GSM-1800 (1800-1870 MHz), ISM 2.45 GHz (2.45-2.457 GHz) and LTE-band 7 (2.6-2.67 GHz). The harvester is formed of two dual-band matching circuits and two rectifiers instead of the conventional design with four single-band matching circuits...
This paper presents the design and the optimization of interstitial microcoaxial applicator antenna for microwave ablation treatment (MWA) of breast cancer. MWA is proposed as a treatment for breast cancer in initial or intermediate stages and involves the application of an electromagnetic field that generates a temperature increase in the cancerous tissue. A model and the validation of microwave...
In this paper, the fault characteristics of different types of wind generators have been investigated. Three types of wind generators, namely Types 1, 3, and 4, along with a microgrid are simulated in both islanded and grid-connected modes using MATLAB/Simulink software. The fault current contribution and voltage at the PCC during the fault have been recorded for each type of the generators. The simulations...
The paper presents an original concept for interfacing of tensoresistive and capacitive force sensors with applications in modern microelectronics systems. In the first part, the authors show the results and conclusions of a PSPICE simulation for an original patented circuit. The used simulations models were introduced in some circuit components corresponding to the realistic behavior implementation...
This paper investigates the characteristics of both efficiency and voltage regulation of a practical single-phase distribution transformer when the shape and dimension of the laminated core are varied. Typically, the iron core of a traditional transformer is composed of E- and I-shape laminations to reduce core loss. The reluctance for the magnetic-flux path inside the iron core of a transformer is...
This paper presents a mixed three-level neutral point clamped (NPC) inverter with hybrid modulation method. It enables traditional Si devices and wide bandgap devices integration to reduce power loss and achieve high power density. Simulation results are firstly provided to verify the validity of the proposed approach.
This paper proposes a new battery management system (BMS) for a series string of battery cells. The proposed control structure is based on a duality of the adaptive droop control theory used in grid / microgrid connected sources. The presented BMS control structure yields higher reliability compared to the conventional ones due to its decentralization features and its communication-less ability. The...
This paper presents an ac ripple repression method for neutral-point voltage of three-level inverter system with electrolytic capacitor less. To reduce the volume of three-level inverter system, electrolytic capacitor with huge capacitance is must eliminated from dc-link. In the inverter system applying film capacitors, however, the ac ripple component in neutral-point voltage of dc-link is increased...
This paper presents a hybrid multilevel inverter with DC bypass. Mixed modulation method is proposed to balance dc voltage, and enables Si devices & wide bandgap devices integration to reduce power loss and achieve high power density. Simulation results are firstly provided to verify the validity of the proposed approach.
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