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Unsupervised Anomaly Detection for Rural Fixed Wireless LTE Networks 农村固定无线LTE网络的无监督异常检测
Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2023-10-05 DOI: 10.1109/ICJECE.2023.3275975
Alexander G. B. Colpitts;Brent R. Petersen
This article presents an anomaly detection (AD) algorithm, robust AD for rural fixed wireless LTE (RAINFOREST), to address the difficulty of fault detection in LTE networks, specifically those that are rural and fixed wireless. We propose a hybrid AD method that uses network key performance indicators (KPIs), historical KPI forecasts, density-based spatial clustering of applications with noise (DBSCAN), and statistical analysis to detect anomalies. RAINFOREST outperformed benchmark AD methods and was able to detect faults in a rural commercial fixed wireless network earlier than existing LTE threshold-based alarms.
本文提出了一种异常检测(AD)算法,即用于农村固定无线LTE的鲁棒AD(RAINFOREST),以解决LTE网络中故障检测的困难,特别是农村和固定无线网络中的故障检测。我们提出了一种混合AD方法,该方法使用网络关键性能指标(KPI)、历史KPI预测、带噪声应用程序的基于密度的空间聚类(DBSCAN)和统计分析来检测异常。RAINFOREST的性能优于基准AD方法,能够比现有的基于LTE阈值的警报更早地检测到农村商业固定无线网络中的故障。
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引用次数: 0
IEEE Canadian Journal of Electrical and Computer Engineering IEEE加拿大电气与计算机工程杂志
Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2023-09-19 DOI: 10.1109/ICJECE.2023.3292709
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引用次数: 0
A Novel Chaotic Attractor With a Line and Unstable Equilibria: Dynamics, Circuit Design, and Microcontroller-Based Sliding Mode Control 一种新的具有线性和不稳定平衡的混沌吸引子:动力学、电路设计和基于单片机的滑模控制
Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2023-07-25 DOI: 10.1109/ICJECE.2023.3275281
Abdullah Gokyildirim
This study proposes a novel chaotic attractor with seven terms in three simple ordinary differential equations involving a line and unstable equilibria. The complex dynamical behavior of the proposed system is studied in detail by analyzing its equilibria, Lyapunov spectra, and bifurcation diagram. The feasibility and accuracy of the novel attractor are examined by constructing its analog circuit implementation. Additionally, periodic states of the system are examined in both numerical and PSpice simulations, as well as an analog circuit implementation. The hardware experimental results are highly compatible with numerical and PSpice simulations. As can be seen from the numerical simulations and hardware implementation, the presented system shows sensitive and rich dynamic behaviors in a small range of system parameters. The proposed oscillator circuit is also cost-effective, as it has only seven terms. Additionally, a sliding mode controller (SMC) is presented to control the novel attractor. The stability of the designed SMC is proven via the Lyapunov stability method. Lastly, a microcontroller-based implementation is realized, and it is seen that the experimental results are in good accordance with the simulation results. The correctness of the proposed controller is approved by theoretical analysis, numerical simulations, and experimental results.
本文提出了一种新的混沌吸引子,它包含三个简单常微分方程中的七项,这些方程涉及一条线和不稳定平衡点。通过分析系统的平衡点、李雅普诺夫谱和分岔图,详细研究了该系统的复杂动力学行为。通过构造其模拟电路实现,检验了新吸引子的可行性和准确性。此外,在数值模拟和PSpice模拟以及模拟电路实现中都检查了系统的周期状态。硬件实验结果与数值模拟和PSpice模拟结果高度兼容。从数值模拟和硬件实现可以看出,所提出的系统在小范围的系统参数下表现出敏感而丰富的动态行为。所提出的振荡器电路也具有成本效益,因为它只有七个项。此外,还提出了一种滑模控制器(SMC)来控制新的吸引子。通过李雅普诺夫稳定性方法证明了所设计的SMC的稳定性。最后,实现了基于微控制器的实现,实验结果与仿真结果吻合良好。理论分析、数值模拟和实验结果验证了该控制器的正确性。
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引用次数: 0
Design and Performance Analysis of a Transverse-Flux PMSG for Applications in Small Wind Turbines 用于小型风力发电机的横向磁通永磁同步发电机的设计和性能分析
Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2023-07-21 DOI: 10.1109/ICJECE.2023.3272562
M. A. Hernández-Rodríguez;R. Iracheta-Cortez
This article is described step by step the methodology for dimensioning a transverse flux permanent magnet synchronous generator for applications in small wind turbines. The proposed methodology is based on the concepts of magnetic circuit theory which have been widely explained in the specialized literature. Due to the generator will be used in a wind turbine that works at variable speeds, it will be necessary to analyze its performance in a full range defined by operation speeds. Also, the performance is analyzed under no load and load conditions. The developed methodology is coded in MATLAB and it has been exhaustively validated through 3-D finite element analysis (FEA).
本文逐步描述了用于小型风力涡轮机的横向磁通永磁同步发电机的尺寸确定方法。所提出的方法基于磁路理论的概念,这些概念已在专业文献中得到广泛解释。由于发电机将用于以可变速度工作的风力涡轮机,因此有必要在运行速度定义的全范围内分析其性能。此外,还分析了空载和负载条件下的性能。所开发的方法在MATLAB中进行了编码,并通过三维有限元分析(FEA)进行了详尽的验证。
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引用次数: 0
Logical Analysis for Switching Sequence Generation in 15-Level Reduced Switch MLI 15级精简开关MLI中开关序列生成的逻辑分析
Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2023-07-21 DOI: 10.1109/ICJECE.2023.3275734
R. Sindhuja;S. Padma
Complexity in the implementation of the inverter circuit lies with the logic behind the generation of the switching pulse sequences using multicarrier-pulsewidth modulation (MC-PWM). The analysis of the switching sequence for the operation of 15 level multi-level inverter (MLI) topology using logical gates is introduced in this article. A 15-level reduced switch topology is proposed which consists of eight switches. The main focus is to analyze the procedure of generating a pulse pattern for the eight switches in the circuit and to obtain the logical expression. Key Findings: The input pulse for the generation of eight different pulse patterns is obtained by MC-PWM technique. Several MC-PWM techniques, including phase disposition (PD), alternate phase opposition disposition (APOD), and phase opposition disposition (POD), are available. POD were applied to the proposed reduced switch topology using the same logical expression and the results were analyzed. MATLAB/Simulink is employed in the execution of the simulation work. The desired pulse pattern is simulated in real time and generated with the assistance of dSPACE 1104. Various modulation index (MI) and several PWM algorithms are used to examine the total harmonic distortion (THD) comparison study.
逆变器电路实现的复杂性在于使用多载波脉宽调制(MC-PWM)生成开关脉冲序列背后的逻辑。本文介绍了使用逻辑门的15电平多电平逆变器(MLI)拓扑操作的开关顺序的分析。提出了一种由八个交换机组成的15级精简交换机拓扑结构。主要重点是分析电路中八个开关产生脉冲模式的过程,并获得逻辑表达式。关键发现:通过MC-PWM技术获得了产生八种不同脉冲模式的输入脉冲。有几种MC-PWM技术可用,包括相位配置(PD)、交替相位相反配置(APOD)和相位相对配置(POD)。使用相同的逻辑表达式将POD应用于所提出的简化交换机拓扑,并对结果进行了分析。仿真工作采用MATLAB/Simulink进行。在dSPACE 1104的帮助下实时模拟并生成期望的脉冲模式。使用各种调制指数(MI)和几种PWM算法来检查总谐波失真(THD)的比较研究。
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引用次数: 0
A Magnetic Switch Sensor Based Inductive Power Transfer System With Power Control and Efficiency Maximization for Vehicular Applications 一种基于磁开关传感器的车载功率控制和效率最大化感应功率传输系统
Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2023-07-20 DOI: 10.1109/ICJECE.2023.3271304
Anshuman Sharma;Mohamed Z. Youssef
In order to establish an efficient inductive power transfer (IPT) mechanism for electric vehicles (EVs) it is necessary that a system with effective power control and efficiency maximization is established. As the equivalent resistance of the on-board battery charger continuously fluctuates during operation, a battery charging algorithm based on an improvised continuous current (CC)–constant voltage (CV) is proposed. This article introduces the design of an integrated stationary IPT system to inductively transfer power from a transmitter pad positioned on the ground and the receiver pad embedded under the chassis of an EV. An innovative feature of the design is the implementation of a magnetic switch sensor that is incorporated into both the transmitting and receiving wireless charging circuitry to ensure optimum alignment for IPT. The power electronics design focuses on the implementation of an H-bridge converter incorporating series–series (SS) compensation topology to use an innovative control algorithm to prioritize battery charging operations. The system is validated through a simulation model in PSIM and a hardware-in-the-loop (HIL) simulation in Typhoon before hardware implementation and testing of the developed prototype. At a test resonant frequency of 23.74 kHz and a nominal air gap separation of 120 mm, the developed IPT system had an overall efficiency of 93.41%.
为了建立高效的电动汽车感应功率传输(IPT)机制,有必要建立一个具有有效功率控制和效率最大化的系统。由于车载电池充电器的等效电阻在运行过程中不断波动,提出了一种基于临时连续电流(CC)-恒压(CV)的电池充电算法。本文介绍了一种集成固定IPT系统的设计,该系统用于从位于地面的发射器垫和嵌入电动汽车底盘下的接收器垫感应传输功率。该设计的一个创新特点是实现了一个磁性开关传感器,该传感器集成到发射和接收无线充电电路中,以确保IPT的最佳对准。电力电子设计的重点是实现H桥转换器,该转换器结合了串联(SS)补偿拓扑结构,使用创新的控制算法来优先考虑电池充电操作。在硬件实现和测试所开发的原型之前,通过PSIM中的仿真模型和Typhoon中的半实物仿真对系统进行了验证。在23.74kHz的测试谐振频率和120mm的标称气隙间隔下,开发的IPT系统的总体效率为93.41%。
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引用次数: 0
IEEE Canadian Journal of Electrical and Computer Engineering IEEE加拿大电气与计算机工程杂志
Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2023-06-21 DOI: 10.1109/ICJECE.2023.3280333
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引用次数: 0
An Adaptive Fault Diagnosis of Electric Vehicles: An Artificial Intelligence Blended Signal Processing Methodology 电动汽车自适应故障诊断:一种人工智能混合信号处理方法
Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2023-06-19 DOI: 10.1109/ICJECE.2023.3264852
Lingli Gong;Anshuman Sharma;Mohammad Abdul Bhuiya;Hilmy Awad;Mohamed Z. Youssef
This article demonstrates an innovative design of a sensorless technique to diagnose, monitor, and broadcast faults in an electric vehicle’s (EV) propulsion operating conditions. By utilizing the artificial intelligence with a signal processing mixed clustering technique, an onboard health monitoring system (HMS) has been presented. The clustering technique uses a data-mining approach to prevent future failures for predictive maintenance planning, which is novel. For example, the propulsion inverter is equipped with a diagnostic system that uses the proposed algorithm to compare the reference gate-driving signal with the actual output voltage of the voltage source inverter (VSI). This article presents different failure scenarios of the inverter and demonstrates the capability to be applied to other components, such as brakes and motors. To validate the proposed technique, the necessary algorithm calculations, simulation, and laboratory prototype results are provided. The proposed work is proven accurate with fast response in healthy and faulty conditions.
本文展示了一种无传感器技术的创新设计,用于诊断、监测和广播电动汽车(EV)推进运行条件下的故障。利用人工智能和信号处理混合聚类技术,提出了一种机载健康监测系统。聚类技术使用数据挖掘方法来预防预测性维护计划的未来故障,这是一种新颖的方法。例如,推进逆变器配备有诊断系统,该诊断系统使用所提出的算法将参考栅极驱动信号与电压源逆变器(VSI)的实际输出电压进行比较。本文介绍了逆变器的不同故障场景,并展示了应用于其他部件(如制动器和电机)的能力。为了验证所提出的技术,提供了必要的算法计算、仿真和实验室原型结果。所提出的工作被证明是准确的,在健康和故障条件下反应迅速。
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引用次数: 0
Time-Distributed Non-Convex Optimized Support Vector Machine for Vehicular Tracking Systems 车辆跟踪系统的时间分布非凸优化支持向量机
Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2023-06-08 DOI: 10.1109/ICJECE.2023.3252088
R. Selvakumar;K. Venkatalakshmi
This article presents a non-convex optimized support vector machine (NCVX OSVM) algorithm for active steering stability of vehicles on a curved road. Initially, we considered a curved road geometrics formulation and designed a time-distributed (TD) model for NCVX OSVM to compute the steering angle 0°–180° at 10 m/s to follow active navigation at the highest curve entry speed. The proposed TD NCVX OSVM is interconnected with three modules. In the first module, formulated NCVX cost functions and Optimized SVM for smooth steering stability. The second module is based on improving faster training time (IFTT) by using the Naive Bayes probabilistic classifier (NBPC). The third module uses an optimized non-convex (NCVX) cost function to reduce the error phenomenon. The performance of these three modules is evaluated by several 100 data points from vehicle onboard sensors. Further, it is pre-processed in the curved road (start, continue, exit) conditions. The decisive of TD-NCVX OSVM design is demonstrated by using experimental learning on FPGA Zynq 7000 processor and programmed with python script. The empirical calculation shows an accuracy of 98.36%. Furthermore, the proposed design predicts an acceptable upper limit for curved steering whenever the vehicle turning speed is greater than 30 mi/h.
本文提出了一种用于弯道车辆主动转向稳定性的非凸优化支持向量机算法。最初,我们考虑了弯道几何公式,并为NCVX OSVM设计了一个时间分布(TD)模型,以计算10 m/s时的转向角0°–180°,从而在最高弯道进入速度下跟随主动导航。拟议的TD NCVX OSVM与三个模块互连。在第一个模块中,制定了NCVX成本函数和优化SVM,以实现平稳转向稳定性。第二个模块是基于使用朴素贝叶斯概率分类器(NBPC)来提高更快的训练时间(IFTT)。第三个模块使用优化的非凸(NCVX)成本函数来减少误差现象。这三个模块的性能通过来自车载传感器的100个数据点进行评估。此外,它在弯道(开始、继续、退出)条件下进行预处理。通过在FPGA Zynq 7000处理器上的实验学习和python脚本编程,证明了TD-NCVX OSVM设计的决定性。经验计算的准确率为98.36%。此外,当车辆转弯速度大于30mm/h时,所提出的设计预测了弯曲转向的可接受上限。
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引用次数: 0
Nonlinear Dynamic States’ Estimation and Prediction Using Polynomial Predictive Modeling 基于多项式预测模型的非线性动态状态估计与预测
Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2023-06-08 DOI: 10.1109/ICJECE.2023.3260830
Dileep Sivaraman;Songpol Ongwattanakul;Jackrit Suthakorn;Branesh M. Pillai
In motion-control applications, noise and dynamic nonlinearities influence the performance of control systems and lead to unpredictable disturbances. The dc servo motors used in motion control applications should have precise control methods to achieve the desired responses. Therefore, predicting and compensating for the disturbance are essential for increasing system robustness and achieving high precision and fast reaction. This article introduces the polynomial predictive filtering (PPF) method to estimate the states of a system using polynomial extrapolation of consecutive and evenly spaced sensor data. Acceleration-/torque-based experiments are conducted to validate the effectiveness and viability of the proposed method. The difference between the real-time sensor data and the PPF-based predicted value shows a standard deviation of less than 0.15 and $1 times 10^{-5}$ for the velocity and disturbance torque, respectively.
在运动控制应用中,噪声和动态非线性影响控制系统的性能,并导致不可预测的扰动。运动控制应用中使用的直流伺服电机应具有精确的控制方法,以实现所需的响应。因此,对扰动进行预测和补偿对于提高系统鲁棒性、实现高精度和快速反应至关重要。本文介绍了多项式预测滤波(PPF)方法,该方法使用连续均匀间隔传感器数据的多项式外推来估计系统的状态。基于加速度/转矩的实验验证了该方法的有效性和可行性。实时传感器数据和基于PPF的预测值之间的差异显示,速度和扰动扭矩的标准偏差分别小于0.15和$1x10^{-5}$。
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引用次数: 0
期刊
IEEE Canadian Journal of Electrical and Computer Engineering
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