Browsing by Author "Metidji, B. (Supervisor)"

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Bionic Robotic Hand controlled by myo-electric signals
(Université M’Hamed BOUGARA de Boumerdes : Institut de génie electrique et electronique (IGEE), 2020) Touait, Ayoub; Douki, Thiziri; Metidji, B. (Supervisor)
Several designs and products are currently available online as complicated limbs and hands for amputees, however many of these can be costly and heavy. This project has taken inspiration from these designs with the goal of reducing cost and weight without sacriﬁcing functionality. One major advantage of our project is ﬂex- ibility, easy to use and to wear. In this project we have developed a prosthetic hand controlled by myoelectric signals captured from the forearm muscle. This signals were ﬁltered and ampliﬁed to be easier to read by a micro-controller. The micro-controller then generated signals to control the mechanical hand based on these myoelectric input signals. This is done by the micro-controller increasing the pulse width sent to several servos making up the hand. The larger the pulse width, the more ﬂexed the hand becomes until it reaches the maximum pulse programmed into it. In addition to that, we have developed a dynamic website for the sale of the prosthesis, where the client can ﬁnd all the information related to this product.
Simulink /modelsimco-simulation of direct torque control for induction motors
(2016) Benyoucef, Imad Eddine; Ghoualmi, Mohcene; Metidji, B. (Supervisor)
This project presents a generic model of a direct torque controller (DTC) for induction machines (IMs) using field programmable gate array (FPGA). The DTC performance is significantly improved by the use of FPGA, which can execute the DTC algorithm at higher sampling frequency. This model is developed in order to reduce the sampling period to a point where torque ripple is minimal, while maintaining the classical DTC control structure. To get simpler implementation and fast computation, minimizing calculation errors and consuming hardware resource usage, three methods were introduced: i) two´s complement fixed-point format and a variable word-size approach was followed, ii) the modified non-restoring method to calculate complicated square root operation of stator flux and iii) a new sector analysis method. The design of the FPGA-based DTC for IMs is presented. Firstly, a novel DTC architecture was designed. Secondly, very-high-speed integrated circuit hardware description language (VHDL) is adopted to describe the behavior of the control algorithms. Finally, to evaluate the effectiveness and correctness of the proposed DTC, a co-simulation work performed by Matlab/Simulink and Modelsim is conducted. The simulation results will be discussed.