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UAV longitudinal autopilot design using SLC and TECS controllers

CEAS Aeronautical Journal 2024年第2期15卷 351-362页

作者： Ghelem, Nourddine Boudana, Djamel Bouchhida, Ouahid Laboratory of Process Control LCP Department of Engineering Control Systems and Applied Mathematics National Polytechnic School ENP of Algiers 10 St Hacen Badi El Harrach Algiers Algeria Department of Electrical Engineering LREA Laboratory University of Medea Medea Algeria

UAVs are becoming increasingly prevalent in a wide range of fields, including surveillance, photography, agriculture, transportation, and communications. Hence, research institutions have developed a range of linear and non-linear controllers that can enhance the stability and efficiency of these UAVs while performing their assigned tasks. In this paper, we present a longitudinal autopilot design for the Sky Sailor solar UAV using two different control techniques. The first technique is a classic controller known as SLC (Successive Loop Closure), which is based on consecutive closed loops using a PID controller. The second technique is the TECS (Total Energy control System) controller, which uses the specified total energy rate and energy distribution rate to regulate the airspeed and altitude of the UAV. After detailing the working principle of each controller and calculating the tuning parameters for each one, we applied the two techniques to the non-linear model that describes the behavior of the Sky Sailor UAV using MATLAB Simulink. The simulation results showed that the TECS controller is superior to the SLC controller in terms of stability and energy efficiency. As such, this technique is an excellent choice for solar drones, as it can increase their endurance. © Deutsches Zentrum für Luft- und Raumfahrt e.V. 2024.

关键词： controllers

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Real-time power flow analysis and management for a long-endurance solar UAV during continuous flight

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CEAS Aeronautical Journal 2023年第4期14卷 1035-1049页

One of the primary challenges for Unmanned Aerial Vehicle (UAV) developers is to improve their endurance while in the air, as their typical flight time is limited to a few hours. One widely used technology to enhance their endurance is harnessing solar energy to power UAV and charge their batteries in flight. This article presents the development of a real-time simulation environment to enable the continuous flight of the Sky Sailor solar UAV. Through the utilization of a solar irradiance model, a solar panel model, real-time power generation is calculated. Simultaneously, the UAV’s full dynamic model, along with the autopilot and propulsion system model, is employed to determine the energy consumption at each moment. The energy management algorithm then compares the acquired energy with the power consumed, and in cases of surplus energy, it is efficiently stored in the battery for nighttime usage. Simulations show that continuous flight of the drone can be achieved during the summer season, when the daylight hours are long enough to fully charge the battery, With the ability to fly continuously during this period, the UAV can be used in various areas, such as monitoring forest fires, agricultural fields, beaches, and security monitoring for oil companies and their life bases in deserts. © 2023, Deutsches Zentrum für Luft- und Raumfahrt e.V.

关键词： Solar energy

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Implementation of the Adaptive Neural networks Backstepping controller for a stand-alone DFIG based WECS

Implementation of the Adaptive Neural networks Backstepping ...

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International Conference on Systems and control (ICSC)

作者： Sami Labdai Larbi Chrifi-Alaoui Lazhari Nezli Boualem Hemici Pascal Bussy Laboratory of Process Control (LCP) National Polytechnic School (ENP) 10 Av. Hassen Badi Algiers Algeria Laboratory LTI University of Picardie Jules Verne IUT of Aisne 13 av. F. Mitterrand Cuffies France

ISBN: (纸本)9781665407830

In this article, we propose an adaptive neural network Backstepping controller for a stand-alone doubly-fed induction generator (DFIG) based WECS. Our main objective is to control the stator voltage magnitude and frequency via the rotor voltages, first a new state-space model representation is developed by adding capacitive loads in parallel with the three-phase machine. The proposed technique is independent of the system model and guarantees the robustness against speed and load variations. The neural network is used to approximate online the nonlinear uncertainties of the system. The chosen architecture is a feed forward with one hidden layer, it is simple to implement and doesn’t require much computational force. The Lyapunov approach is used to ensure the stability of the proposed control and neural adaptation laws. The experimental tests are conducted on a 1.5kW DIFG using a 4.5 kW wind emulator and the dSPACE 1104 card. The obtained results show the effectiveness of our strategy compared with the previous works done on the same testbed using PI and the Backstepping technique.

关键词： Backstepping Uncertainty Adaptive systems Neural networks Load management Stability analysis Robustness

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Indirect Fuzzy Adaptive Synchronization and control of a Grid-Connected DFIG-Based WECS

Indirect Fuzzy Adaptive Synchronization and Control of a Gri...

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International Conference on control, Automation and Diagnosis (ICCAD)

作者： S. Labdai A. Alibi L. Chrifi-Alaoui S. Drid B. Hemici L. Nezli Laboratory LTI University of Picardie Jules Verne IUT of Aisne Cuffies France Laboratory of Process Control (LCP) National Polytechnic School (ENP) Algiers Algeria University Batna 2 Batna Algeria

ISBN: (数字)9781728169996

ISBN: (纸本)9781728170008

In this paper, we propose an indirect adaptive control strategy for a Doubly Fed Induction Generator (DFIG) based Wind Energy Conversion System (WECS) linked to both external loads and the electrical grid. This configuration is widely used in smart buildings when the building has a positive power it can inject the excess amount directly to the grid. Our objective is to ensure the fast-tracking and boundless of all signals in both stages of synchronization and power regulation. The proposed technic is independent of the system model and guarantees the robustness against external (load changes) and internal perturbations (speed changes...etc.). The fuzzy adaptive system is used to estimate in real-time the nonlinear functions of the system, the control law with the proposed adaptation laws ensure the stability of the controller with the DFIG based WECS. Numerical and graphical Simulation results illustrate the efficiency of the proposed scheme for both synchronization and power control.

关键词： Doubly fed induction generators Synchronization Stators Adaptation models Wind turbines Rotors Fuzzy logic

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A Rule-based Power Management controller using Stateflow for Grid-Connected PV-Battery Energy System supplying Household load

A Rule-based Power Management Controller using Stateflow for...

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IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

作者： Mostefa Kermadi Zainal Salam El Madjid Berkouk Laboratory of Process Control (LCP) Universiti Teknologi Malaysia (UTM) Faculty of Electrical Engineering (FKE) Universiti Teknologi Malaysia (UTM). UTM Skudai Johor Bahru Malaysia Laboratory of Process Control (LCP) National Polytechnic School of Algiers Algeria

This paper discusses the implementation of an energy management controller (EMC) for grid-connected PV system using the Stateflow approach. This approach provides a rapid design of the controller and efficient code generation for target hardware implementation. A typical micro-grid is considered in this study includes a PV generator, an energy storage system composed of lit-ion battery and the EMC to balance the power flow between the different components of the system. Initially, the different components of the system are simulated under Matlab/Simulink environment. Thereafter, the different operation modes of this controller and its development using the State-flow tool are detailed. Simulation is carried out using a 20 second weather profile to prove the effectiveness of the proposed EMC. It also demonstrated the simplicity of the controller development using the Stateflow tool.

关键词： Batteries Electromagnetic compatibility Mathematical model State of charge Generators Voltage control

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Global Stability Analysis of Healthy Situation for a Coupled Model of Healthy and Cancerous Cells Dynamics in Acute Myeloid Leukemia*

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IFAC-PapersOnLine 2017年第1期50卷 15103-15108页

作者： Zenati, Abdelhafid Chakir, Messaoud Tadjine, Mohamed Laboratory of Process Control LCP Department of Control Engineering National Polytechnic School ENP of Algiers 10 St Hacen Badi El Harrach Algiers Algeria

In this paper we aim to study the global stability of a coupled model of healthy and cancerous cells dynamics in healthy situation of Acute Myeloid Leukemia. We also clarify the effect of interconnection between healthy and cancerous cells dynamics on the global stability The interconnected model is obtained by transforming the PDE-based model into a nonlinear distributed delay system. Using Lyapunov approach, we derive necessary and sufficient conditions for global stability for a selected equilibrium point of particular interest (healthy situation). Simulations are conducted to illustrate the obtained results. © 2017

关键词： Stability Diseases Dynamics Models Acute myeloid leukemia Distributed delays Equilibrium point Global stability Global stability analysis Interconnected models Leukemia Lyapunov approach

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An wearable eye tracker for coordinates of POG estimation using 3D model

An wearable eye tracker for coordinates of POG estimation us...

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IEEE International Conference on Consumer Electronics-Taiwan (ICCE-TW)

作者： Chi-Wu Huang Chun-Wei Hu College of Engineering Peking University Beijing P. R. China Process Control Laboratory (LCP) National Polytechnic School (ENP) of Algiers Algeria CReSTIC IUT de Troyes Troyes France

ISBN: (纸本)9781509020744

This paper presents a wearable eye tracker which is able to estimate the coordinates of point-of-gaze (POG) in 3D. By using this model, constructed by the glint (corneal reflection of IR LED) and the image of pupil center, the coordinates of POG can be estimated by calculating the intersection point of gaze-line (or visual axis) and screen. Aside from using in computer monitor, this eye tracker can apply in real 3D scene environment because it is wearable. An eye tracker is a device that analyzes eye movements, commonly applied to experiment of market research and psychology. Recently, it also has gained applications in military devices and consumer electronics.

关键词： Three-dimensional displays Reflection Cameras Biomedical monitoring Visualization Calibration Adaptive optics

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Fuzzy identification and control of a piezoelectric actuator

Fuzzy identification and control of a piezoelectric actuator

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International Conference on control, Engineering & Information Technology (CEIT)

作者： Aissa Rebai Kamel Guesmi Boualem Hemici Process Control Laboratory (LCP) National Polytechnic School (ENP) of Algiers Algeria CReSTIC IUT de Troyes Troyes France

Due to the special characteristics of piezoelectric actuators, the modelling and control task of these devices has been one of the most important research topic in the last decade. In the first part of this paper, a T-S fuzzy model is proposed to represent the behavior of this type of actuators and the recursive least squares (RLS) algorithm is used to optimize the parameters of this model. In the second part, based on an analytical model, a fuzzy PID controller for the piezoelectric actuator plant is presented. An ant colony optimization (ACO) algorithm is used to find the parameters of the proposed controller. The proposed approaches are validated through simulation along with their satisfactory performances.

关键词： Piezoelectric actuators Hysteresis Adaptation models Mathematical model Fuzzy systems Signal processing algorithms Ant colony optimization

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Design of an adaptive fuzzy sliding mode controller for non-linear hysteretic systems

Design of an adaptive fuzzy sliding mode controller for non-...

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International Conference on Electrical Engineering

作者： Aissa Rebai Kamel Guesmi Boualem Hemici Process Control Laboratory (LCP) National Polytechnic School (ENP) of Algiers CReSTIC IUT de Troyes

ISBN: (纸本)9781467366748

In this paper, a new adaptive fuzzy sliding mode controller is developed for a class of non-linear hysteretic systems. First, the problem is formulated where the hysteresis behavior is described by a backlash-like model. Then, a fuzzy system is used to approximate the unknown system dynamics and an adaptive sliding mode controller is constructed. Finally, an application example to show the performance of the proposed approach.

关键词： Non-linear systems Backlash-like hysteresis Sliding mode control Fuzzy control

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Production of Biodiesel with Seed Soybean and Supercritical Ethanol

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Journal of Sustainable Bioenergy Systems 2014年第2期4卷 128-135页

作者： Gabriel Cassemiro Mariano Toni Jefferson Lopes Rafael Dias Marintho Bastos Quadri Ariovaldo Bolzan Laboratory of Process Control(LCP) Chemical EngineeringFederal University of Santa Catarina(UFSC)FlorianopolisBrasil Federal University of Rio Grande(FURG) Campus Santo Antonio da Patrulha(SAP)Rio Grande do SulBrasil

This paper presents a study of biodiesel production by a non-catalytical process. The innovation in this study is the use of novel materials for production: seed soybean (Glycine Max) “in natura” and ethanol in a supercritical state. To conduct the experiments, a bench reactor with a capacity of 150 mL, resistant to pressure of up to 300 bar and temperature of 350°C was developed. The fractional factorial experimental design () was used to evaluate the temperature, seed granulometry, molar ratio ethanol/oil and water percent of the mixture. The best yield observed was that of 94.07%, 10 minutes after the reactor entered a supercritical condition. Significant effects on seed granulometry, molar ratio ethanol, oil and temperature were verified. From the proposed process, biodiesel and toasted soybean seed were obtained. To purify the biodiesel sample it was necessary to use ultra-centrifugation to separate seed particles, and rotoevaporation to separate the fatty acid ethyl ester and unreacted ethanol. The chemical analyses were conducted directly by gas chromatography. The yield was calculated in accordance with concentrations obtained in the chromatographic analysis and seed mass of the experiment. Also checked was the presence of palmitate esters, stearate, oleate, linoleate and linolenate. By analyzing the ester composition it was possible to assess whether a good quality biodiesel was available. The roasted soybean seeds obtained after the reaction showed a calorific potential of 2203.17 kcal/kg and also be used as fuel.

关键词： Supercritical Biodiesel Non-Catalytic Transesterification Ethyl Ester Soybean Seed

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