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2022 5th International Conference on Advanced Systems and Emergent Technologies (IC_ASET)最新文献

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Trajectory Tracking Control of Upper-Limb Rehabilitaion Exoskeleton Based on Robust Control 基于鲁棒控制的上肢康复外骨骼轨迹跟踪控制
Pub Date : 2022-03-22 DOI: 10.1109/IC_ASET53395.2022.9765896
Ines Mahmoud, Imen Saidi
In this paper, the problem of rehabilitation of the upper limb using exoskeletons has been addressed. More specifically, we have proposed a command specifically dedicated to these robotic structures to take advantage of their capacity for interaction at the articular level of the human limb. The robust control proposed is quite simple in principle. But we have seen that the dynamic modeling of the upper limb exoskeleton is strongly nonlinear. It is therefore necessary to implement specific techniques for calculating compatible trajectories to achieve this end. The nominal adaptive control showed the efficiency and robustness in closed loop.
本文讨论了外骨骼在上肢康复中的应用问题。更具体地说,我们提出了一个专门用于这些机器人结构的命令,以利用它们在人类肢体关节水平上的相互作用能力。所提出的鲁棒控制原理简单。但我们已经看到,上肢外骨骼的动力学建模是强非线性的。因此,有必要采用具体的技术来计算相容的轨迹,以实现这一目的。所提出的自适应控制在闭环环境下具有良好的鲁棒性和有效性。
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引用次数: 0
Sliding Mode Control for Hexacopter Autopilot design 六旋翼机自动驾驶仪滑模控制设计
Pub Date : 2022-03-22 DOI: 10.1109/IC_ASET53395.2022.9765926
Helmi Abrougui, S. Nejim, Anis Charrada, Habib Dallagi
This paper proposes an approach for modeling and controlling the attitude of a hexacopter. An autopilot is designed using sliding mode control. It consists of a low-level controller for attitude stabilization and a high-level controller for position tracking control. Simulations are carried out to show the effectiveness of the designed autopilot.
提出了一种六旋翼机姿态建模与控制方法。采用滑模控制设计了自动驾驶仪。它由一个用于姿态稳定的低级控制器和一个用于位置跟踪控制的高级控制器组成。仿真结果表明了所设计的自动驾驶仪的有效性。
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引用次数: 2
The Routing Protocol for low power and lossy networks (RPL) under Attack: Simulation and Analysis 攻击下低功耗损耗网络(RPL)路由协议:仿真与分析
Pub Date : 2022-03-22 DOI: 10.1109/IC_ASET53395.2022.9765901
Amal Hkiri, Mouna Karmani, Mohsen Machhout
Routing protocol for low power and lossy networks (RPL) is the underlying routing protocol of 6LoWPAN, a core communication standard for the Internet of Things. In terms of quality of service (QoS), device management, and energy efficiency, RPL beats competing wireless sensor and ad hoc routing protocols. However, several attacks could threaten the network due to the problem of unauthenticated or unencrypted control frames, centralized root controllers, compromised or unauthenticated devices. Thus, in this paper, we aim to investigate the effect of topology and Resources attacks on RPL.s efficiency. The Hello Flooding attack, Increase Number attack and Decrease Rank attack are the three forms of Resources attacks and Topology attacks respectively chosen to work on. The simulations were done to understand the impact of the three different attacks on RPL performances metrics including End-to-End Delay (E2ED), throughput, Packet Delivery Ratio (PDR) and average power consumption. The findings show that the three attacks increased the E2ED, decreased the PDR and the network throughput, and degrades the network’, which further raises the power consumption of the network nodes.
低功耗损耗网络路由协议(RPL)是物联网核心通信标准6LoWPAN的底层路由协议。在服务质量(QoS)、设备管理和能源效率方面,RPL击败了与之竞争的无线传感器和自组织路由协议。然而,由于未经身份验证或未加密的控制帧、集中的根控制器、受损或未经身份验证的设备等问题,一些攻击可能会威胁到网络。因此,在本文中,我们的目标是研究拓扑和资源攻击对RPL的影响。年代效率。Hello flood攻击、Increase Number攻击和reduce Rank攻击分别是资源攻击和拓扑攻击的三种形式。模拟是为了了解三种不同攻击对RPL性能指标的影响,包括端到端延迟(E2ED)、吞吐量、分组传输比(PDR)和平均功耗。研究结果表明,这三种攻击增加了E2ED,降低了PDR和网络吞吐量,降低了网络质量,进一步提高了网络节点的功耗。
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引用次数: 3
Detection of Pepper and Tomato leaf diseases using deep learning techniques 利用深度学习技术检测辣椒和番茄叶片病害
Pub Date : 2022-03-22 DOI: 10.1109/IC_ASET53395.2022.9765923
B. Tej, Farah Nasri, A. Mtibaa
Agriculture industry assumes a big role in several countries’ economies by offering a few advantages including food, national income, and employment opportunities. However, it confronts a major challenge which is plant disease. Around 42% of the world’s total crops are destroyed yearly by diseases. So, the identification of plant disease in an earlier stage is critical for minimizing the use of pesticides and reducing crop loss. This research is focusing on the recognition and classification of various tomato and pepper diseases based on Deep learning techniques. Two Convolutional neural networks (CNN) models Resnet 152 and Resnet 50 are used with and without data augmentation. This technique is used when the datasets are small, it expands the number of training images without adding new images. A self-dataset of 488 images of tomato and pepper diseases leaves are collected in Monastir, Tunisia region under the supervision of an agricultural engineer working in the field of plant protection in the Minister of Agriculture. The trained model with data augmentation gives better results than without applying it.
农业在一些国家的经济中扮演着重要的角色,它提供了包括食品、国民收入和就业机会在内的一些优势。然而,它面临着一个重大的挑战,那就是植物病害。每年约有42%的世界农作物被病害摧毁。因此,在早期阶段识别植物病害对于最大限度地减少农药的使用和减少作物损失至关重要。本研究的重点是基于深度学习技术的各种番茄和辣椒病害的识别和分类。两个卷积神经网络(CNN)模型Resnet 152和Resnet 50在有和没有数据增强的情况下使用。该技术用于数据集较小的情况下,它可以在不增加新图像的情况下扩展训练图像的数量。在农业部植物保护领域工作的一名农业工程师的监督下,在突尼斯Monastir地区收集了488张番茄和辣椒病害叶片图像的自数据集。经过数据增强的训练模型比没有增强的模型得到更好的结果。
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引用次数: 4
Sliding mode observer for fractional order nonlinear dynamical systems 分数阶非线性动力系统的滑模观测器
Pub Date : 2022-03-22 DOI: 10.1109/IC_ASET53395.2022.9765893
Dorsaf Etlili, Atef Khedher, A. Errachdi
This paper proposes a sliding mode observer for nonlinear fractional order systems. The proposed observer based on the Caputo derivative investigates the estimation problem of nonlinear chaotic dynamical systems fractional order. The comparison with order integer shows that this approach maintains the convergence of estimation errors to equilibrium point using the Mittag Leffler and Lyapunov stability.
提出了一种非线性分数阶系统的滑模观测器。基于Caputo导数的观测器研究了分数阶非线性混沌动力系统的估计问题。与阶整数的比较表明,该方法利用Mittag Leffler和Lyapunov稳定性保持了估计误差收敛到平衡点。
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引用次数: 0
Proactive Caching Placement Strategy with End-to-end Delay Reduction in C-RAN Using Queuing Theory 基于排队理论的C-RAN端到端延迟降低策略
Pub Date : 2022-03-22 DOI: 10.1109/IC_ASET53395.2022.9765918
Safa Mrad, S. Hamouda
Thanks to many techniques brought by 5G, operators are now able to control and avoid congestion in the backhaul networks. For instance, efficient content placement strategy can mitigate the content download delay. Motivated by this hot-topic, we investigate in this paper proactive delay-aware edge caching problem in Cloud Radio Access Network (C-RAN). We introduce a new approach based on Queuing Theory to reduce the average content end-to-end delay in the network. Traffic at the Base Band Unit (BBU) as well as at the Radio Remote Head (RRH) are modeled as M/M/1/ queues. Then, the impact of the arrival rate, cache size and popularity distribution parameter on the average delivery delay is studied. This approach will consequently help set a new strategy of proactive content placement. Simulation results showed that our proposed content placement strategy outperforms common placement strategies.
由于5G带来的许多技术,运营商现在能够控制和避免回程网络的拥塞。例如,有效的内容放置策略可以减轻内容下载延迟。基于这一热点问题,本文研究了云无线接入网(C-RAN)中的主动延迟感知边缘缓存问题。本文提出了一种基于排队理论的网络内容端到端平均时延降低方法。BBU (Base Band Unit)和RRH (Radio Remote Head)上的流量建模为M/M/1/队列。然后,研究了到达率、缓存大小和流行度分布参数对平均投递延迟的影响。因此,这种方法将有助于设置主动内容放置的新策略。仿真结果表明,本文提出的内容放置策略优于一般的内容放置策略。
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引用次数: 0
Actor-Critic based Adaptive Control Strategy for Effective Energy Management 基于行为者评价的有效能量管理自适应控制策略
Pub Date : 2022-03-22 DOI: 10.1109/IC_ASET53395.2022.9765869
Chandramouli Sankaranarayanan, Sreenath Shaju, Mohak Sukhwani
Effective energy management is the key for sustainable future. Optimizing energy consumption in commercial buildings plays a major role in reducing overall carbon footprint and operations cost. Heating, Ventilation, and Air Conditioning (HVAC) systems contribute to about 40%-50% of the total electricity consumption in a commercial buildings, placing an economic burden on building operations. Optimal management of HVAC systems is challenging due to the non-linear nature of the control problem arising out of several stochastic internal and external factors or disturbances. Conventional HVAC systems are controlled via PID controllers. Recently, a growing interest has been observed in Artificial Intelligence based HVAC control systems to improve comfort conditions while avoiding unnecessary energy consumption. In this paper, we explore the applications of an actor-critic based model free deep reinforcement learning to control the temperature of a room serving an office building. The RL control strategy is compared with the conventional PID controller, which goes out of tune during dynamic thermal load. Further, we explore the factors that affect the performance of the actor-critic based RL controller.
有效的能源管理是未来可持续发展的关键。优化商业建筑的能源消耗在降低总体碳足迹和运营成本方面发挥着重要作用。暖通空调(HVAC)系统约占商业建筑总用电量的40%-50%,给建筑运营带来了经济负担。由于一些随机的内部和外部因素或干扰所引起的控制问题的非线性性质,暖通空调系统的优化管理具有挑战性。传统的暖通空调系统是通过PID控制器控制的。最近,人们越来越关注基于人工智能的暖通空调控制系统,以改善舒适条件,同时避免不必要的能源消耗。在本文中,我们探索了基于行为评论的无模型深度强化学习的应用,以控制办公楼房间的温度。对比了传统PID控制器在动态热负荷下的失调性。进一步,我们探讨了影响基于actor-critic的RL控制器性能的因素。
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引用次数: 0
Xilinx-FPGA for Real-Time Implementation of Vector Control Strategies for a Grid-Connected Variable-Speed Wind Energy Conversion System 并网变速风能转换系统矢量控制策略实时实现的Xilinx-FPGA
Pub Date : 2022-03-22 DOI: 10.1109/IC_ASET53395.2022.9765935
Mahdi Hermassi, Saber Krim, Y. Krim, Mohamed Ali Hajjaji, A. Mtibaa, M. Mimouni
This paper proposes a Xilinx Zynq-FPGA (Field Programmable Gate Array) for real time hardware implementation of a vector control strategy for a grid-connected variable-speed wind energy conversion system. In order to overcome the problem of important computation time and the control loop delay due to the sequential processing of the control algorithm for wind generator, a Xilinx Zynq-FPGA is proposed as an alternative solution, thanks to its parallel processing. In fact, the Xilinx Zynq-FPGA is characterized by a hardware architecture with parallel computation. Indeed, the FPGA technology has great advantages like the programmable wired function, the fast computing capability, the shorter design cycle, the integrated processor, the low power consumption and the higher density. The studied system is composed of a wind turbine, a permanent magnet synchronous generator, and two converters (a rectifier and an inverter) linked by a DC bus. The system is connected to the grid through a resistor–inductor filter. The proposed control strategy performances are evaluated by digital simulation utilizing an Xilinx System Generator (XSG) toolbox that guaranties rapid and efficient prototyping of the implemented architecture on the FPGA device. In fact, the hardware architectures of the rectifier vector control and the inverter vector control are designed using the XSG tool. The obtained results demonstrate that the XSG simulation offers better results in terms of tracking and accuracy.
本文提出了一种Xilinx Zynq-FPGA(现场可编程门阵列),用于并网变速风能转换系统矢量控制策略的实时硬件实现。为了克服风力发电机控制算法顺序处理带来的重要计算时间和控制环路延迟问题,提出了一种Xilinx Zynq-FPGA,该fpga具有并行处理的特点。实际上,Xilinx Zynq-FPGA的特点是具有并行计算的硬件架构。的确,FPGA技术具有可编程有线功能、快速计算能力、设计周期短、集成处理器、低功耗和高密度等优点。所研究的系统由一个风力发电机、一个永磁同步发电机和两个变流器(一个整流器和一个逆变器)组成,通过直流母线连接。该系统通过一个电阻-电感滤波器与电网相连。利用Xilinx System Generator (XSG)工具箱对所提出的控制策略性能进行了数字仿真评估,以保证在FPGA器件上快速高效地实现所实现架构的原型。实际上,整流矢量控制和逆变矢量控制的硬件架构都是使用XSG工具设计的。实验结果表明,XSG仿真在跟踪和精度方面具有较好的效果。
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引用次数: 1
Design and Analysis of Micro Actuator through Trapezoidal Shaped Electrostatic Comb Drive and Curved Beam System 梯形静电梳状传动和曲线梁系统微驱动器的设计与分析
Pub Date : 2022-03-22 DOI: 10.1109/IC_ASET53395.2022.9765902
Faisal Nawaz, Umar Jamil, M. S. Aziz, R. I. Shakoor
Electrostatic actuators have a significant role in Microelectromechanical Systems (MEMS). Electrostatic comb drive actuator with trapezoidal-shaped geometry is reliable as compared to a rectangular shaped system because of maximum displacement and large driving force. The limitation in the use of the trapezoidal-shaped electrostatic actuating system is a pull-in phenomenon because of the angular effect and large driving voltage. In this research work, a trapezoidal-shaped comb-drive actuator with curved flexures is designed and analyzed to minimize driving voltage through the low stiffness of curved beams. With a driving voltage of 36.6V, displacement of 25μm is achieved in this research work. A comparison of these results with published works is also presented and discussed.
静电致动器在微机电系统(MEMS)中占有重要地位。梯形静电梳状传动系统具有最大的位移和较大的驱动力,与矩形系统相比,具有较好的可靠性。梯形静电作动系统由于角效应和驱动电压大,存在拉入现象,限制了其使用。本文设计并分析了一种具有弯曲挠度的梯形梳状驱动器,通过弯曲梁的低刚度来实现驱动电压的最小化。在驱动电压为36.6V时,实现了25μm的位移。将这些结果与已发表的作品进行了比较,并进行了讨论。
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引用次数: 0
Review of low voltage DC technology prospects in smart buildings 低压直流技术在智能建筑中的应用前景综述
Pub Date : 2022-03-22 DOI: 10.1109/IC_ASET53395.2022.9765887
Hamza Ben Abdeljawed, L. Ouni
Smart buildings are a key element on the road to energy transition. Their ecosystem optimizes energy consumption through coordinated, automated and remote control of building equipment. Concurrently, the comeback of DC power, notably through low voltage DC (LVDC) technology is attracting the interest of both researchers and manufacturers in the building sector. This paper reviews the prospects of LVDC in smart buildings and its technological contribution.
智能建筑是能源转型道路上的关键因素。他们的生态系统通过协调、自动化和远程控制建筑设备来优化能源消耗。与此同时,直流电源的回归,特别是通过低压直流(LVDC)技术吸引了建筑领域研究人员和制造商的兴趣。本文综述了LVDC在智能建筑中的应用前景及其技术贡献。
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引用次数: 0
期刊
2022 5th International Conference on Advanced Systems and Emergent Technologies (IC_ASET)
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