Contrôle
Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/3081
Browse
62 results
Search Results
Item Identification of distributed parameter systems a neural network based approach(2016) Benhammada, Ibtissem; Kouadri, A. (Supervisor)In recent years, Advances in scientific computation and developments in spatially resolved sensor technology have critically enhanced the ability to develop modeling strategies, and experimental techniques for the study of the spatiotemporal response of distributed nonlinear systems. Usual alternatives for the modeling of these systems are some simplifying techniques that seek to capture the distributed system dynamics through lumped parameter models, they can be drastically under-resolved, and, miss important features of the true system response. Robust implementations of distributed system identification algorithms based on detailed spatiotemporal experimental data have, therefore, an important role to play. In this project, we present a methodology for the identification of distributed parameter systems, based on artificial neural network architectures.Item Adaptive PID fuzzy logic control of the recycle compression systems(2016) Lahbiben, Yasmine; Ouacif, Hadjer; Boushaki, Razika (Supervisor)Centrifugal compressors play an integral role in the oil and gas industry, helping power the multiple processes that convert oil and gas into thousands of practical products. These types of compressors can encounter a very dangerous and detrimental problem called surge. This work deals with the study of Centrifugal compressor surge and its prevention. In order to avoid the surge occurrence and ensure compressor’s operation in the stable region with maximum efficiency, appropriate techniques are considered based on PID regulator. Classical PID controllers remain one of the simplest, most effective, robust, and easily certifiable control strategies. However, this simplicity comes with a price. Design tradeoffs between integral and derivative gain in a linear PID controller often make it difficult to achieve optimal performance. To solve this problem, the design of a multistage fuzzy PID controller is proposed in this thesis. The simulation results show the effectiveness of the multistage fuzzy PID controller in maintaining the speed and stability of the system.Item Design and implementation of automatic bottle filling system using PLC and SCADA(2016) Mohammed, Abdelmalek; Ould Amara, Mouloud; Ouadi, A. (Supervisor)This Project objective is to design and Implement a Programmable Logic Controller based automatic bottle filling using a Siemens SIMATIC S7-200 (CPU 226) PLC which acts as a field controller that runs the designed prototype by sensing the presence of bottle in a conveyor belt and then filling it accordingly up to a fixed level. In order to keep track of the overall process in real time, a four layers distributed Supervisory Control And Data Acquisition system was built to monitor and remotely control the bottle filling station over a local area network through an Human Machin Interface designed specifically for the proposed system that indicates the status of different process variables, displays alarms and log events. The SCADA system was deployed using LabVIEW software which makes the system cost efficient, flexible with an open environment and reliable solution for automation of small scale industries.Item Modeling, simulation and ontrol of as urbine in Combined cycle power plant(2016) Bacha, Sofiene; Djebbari, Sidali; Ouadi, A. (Supervisor)Gas turbines have become increasingly popular in the different power systems, due to their higher efficiency, especially when connected in a combined cycle setup. With increasing installations of gas turbines scheduled in different countries, the dynamics of the gas turbines become increasingly more important. The purpose of this work is understanding, modelling, and analyzing the behavior of 9FB General Electric gas turbine in the Combined Cycle Power Plant (CCPP) of Shariket Kahrabaa Hadjret Ennouss (SKH) with a view to investigate the power system problems. A description of the CCPP major parts is presented with specific description of the 9FB gas turbine and its combustion system. For modeling purpose, the parameters of Rowen’s model for the 9FB Heavy Duty Gas Turbine (HDGT) are derived and several simulated tests using Matlab/Simulink are executed. The way of obtaining the parameters are based on simple physical laws. It explains briefly how to extract the parameters of the model using the operational and performance data. Rowen’s model has provided a starting point for development of other models. Among these models, the Frequency Dependent model is taken to be under study since it is suitable for long-term simulation of power system dynamic performance involving abnormal frequency conditions.Item Identification of A distributed parameter system using the least squares technique(2016) Dahlouk, Abdelkader; Azzoug, El-Mehdi; Kouadri, Abdelmalek (Supervisor)The identification of such systems represents one of the important directions of theoretical and practical research, due to large class of applications; fluid flow systems, heat diffusion systems, etc. In this context, we consider the linear parametric identification of distributed parameters systems using the Least Square. Two numerical examples of heat transfer systems are presented where linear and nonlinear models are obtained from heat difference equation. The third application is about the identification of a heat conduction in a cement rotary kiln using experimental data. We anticipate that this work be intuitive for practical applications in the areas of controls and signal processing.Item Active surge control of the compressor recycle system using feedback linearization(2016) Hemchi, Oussama; Tebba, Assam; Boushaki, Razika (Supervisor)Surge control in the centrifugal compressor recycle system is our main focus in this project. Surge is a term that is used for instability or oscillation through a compressor and is highly unwanted. The recycle system feeds compressed gas back to the intake via the recycle valve to ensure the safety of the system. A mathematical model of the recycle system which contains the compressor characteristic is extended and simulated in SIMULINK. The recycle system is proven to be stable as long as the slope of the compressor characteristic is negative. Two control techniques were used: The first is Surge Avoidance in which a PID controller keeps the operating point far from the unstable region and ensure the total safety of the system. The second method is Active Surge Control in which feedback linearization method is used to linearize the system then linear controllers were used to stabilize the system near the unstable region where efficiency is high.Item Optimization and Control of Recycle Compression systems using PSO algorithm and PID controller(2016) Idoughi, Achour; Abdennacer, RamdaniI; Boushaki, Razika (Supervisor)Centrifugal compressors are the most satisfactory and the widely used in oil and gas companies, however, stable operation of this type of compressors is limited towards low mass flows by the occurrence of an aerodynamic compressor flow instability called the surge. This instability can lead to severe damage of the machine due to large mechanical and thermal loads in the blading, and restrict its performance and efficiency. In this thesis, a method of controlling the stability of a compression system and optimising its efficiency was presented and developed. Before going through the controlling and the optimising parts of the work, elementary definitions of compressors and surge have been presented. A mathematical model of Greitzer has been used to model our compression system and, using Matlab Simulink, the compressor’s model has been built up. As most industries nowadays are using the PID controller to ensure the stability of compression systems, the classical solution (the use of the PID controller) to eliminate surge has been explored. To increase the output discharge pressure of the compressor, thus increase the compressor’s efficiency, the particle swarm-optimising algorithm (PSO) is introduced along with the PID controller to the Simulink model. The PID did stabilise the system in a short time. However, when using it, the compressor’s pressure ratio was quite low. This was overcame once using the PSO, where an acceptable pressure ratio was obtained.Item Kinect-based collision-free path planning for mobile manipulators(2016) Boulahya, Ala Eddine; Belaidi, Hadjira (Superviseur)The objective of this project is to generate, in off-line, a path (trajectory) without collision for a mobile base (mobile base with an arm) in an indoor environment which is complex dynamic and cluttered with obstacles the case of reaching tasks. The generated free path must joint an initial situation of the robot base, (XB, YB, ZB) init , to a predefined final position, (XB, YB, ZB) End . In order to move the form an initial situation to the final goal while avoiding any obstacles (using a technique of soft-computing), the robot will operate a kinect camera. The implementation and validation will be performed on the mobile manipulator RobuTer/ULM available at the DPR CDTA.Item Virtual measurement system for AC machine using labview(2016) Henniche, Feriel; Keddache, Nadia; Ouadi, Abderrahmane (Supervisor)It is widely accepted that contemporary scientific experimentation on electrical machines requires extensive measurements and acquisition of various data. In this project the development of virtual measurements system based on labview software environment is described. This system is able to perform an essentially large number of simultaneous electrical and mechanical physical variables measurements of an AC induction machine. In the studied case only voltages, currents (of the three phase system ),speed and torque are measured and recorded in real time , while power, reactive power, apparent power,total harmonic distortion…etc are calculated according to the IEEE(Institute of Electrical and Electronic Engineering) std 1945-2000. A graphical user interface is created to allow an accurate measurements display and data recording using TDMS function (Writes data to binary measurement files (.tdm or .tdms)).Item Comparative study of block pole design and pole placement in a helicopter case(2016) Abahri, Ferial; Hariche, K. (Supervisor)One of the most popular techniques used to design the dynamics of a system is state feedback. In the case of multivariable systems, the feedback gain matrix permitting the assignment of the desired set of closed loop poles is not unique. Helicopters represent a good example of complex multi-input multi-output systems as they are inherently unstable, highly cross-coupled and very non-linear. The objective of this thesis is to compare and evaluate two design methodologies, based on canonical forms: block pole design and pole placement, for the case of a Lynx helicopter model at Hover. The study is conducted through the simulation of large number of possible state feedback gains .The initial condition response of these cases are plotted , the time response characteristics , gain matrices , performance and robustness measures are computed .These results are then compared to select the study cases with the smallest feedback gains and best time response and robustness performances .