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2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)最新文献

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Censored regression system identification based on the least mean M-estimate algorithm 基于最小均值m估计算法的截尾回归系统辨识
Pub Date : 2021-08-01 DOI: 10.1109/ICIEA51954.2021.9516208
Gen Wang, Haiquan Zhao
Classical adaptive algorithms have good convergence performance in linear regression system identification. However, they will face performance degradation while dealing with censored data since only incomplete information can be obtained. In this paper, the least mean M-estimate algorithm for censored regression (CR-LMM) is proposed for the robust parameter estimation. To compensate for the bias caused by censored observation, the probit regression model is employed to derive the estimated error for constructing the M-estimate cost function. The cost function can expel the adverse impact of the impulsive noise, and it is solved by the unconstrained optimization method. Computer simulations in the impulsive environment are carried out to demonstrate that the proposed CR-LMM algorithm exhibits better convergence performance than the existing algorithms in censored regression system identification scenarios.
经典自适应算法在线性回归系统辨识中具有良好的收敛性能。然而,由于只能获得不完整的信息,它们在处理审查数据时将面临性能下降的问题。本文提出了截短回归的最小均值m估计算法(CR-LMM),用于鲁棒参数估计。为了补偿截尾观测造成的偏差,采用概率回归模型推导估计误差,构造m估计代价函数。成本函数可以排除脉冲噪声的不利影响,并采用无约束优化方法进行求解。在脉冲环境下的计算机仿真结果表明,本文提出的CR-LMM算法在删检回归系统辨识场景下具有比现有算法更好的收敛性能。
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引用次数: 0
Optimization of Solar Collector and Heat Storage Tank for Solar Absorption Refrigeration 太阳能吸收式制冷系统太阳能集热器及蓄热罐的优化设计
Pub Date : 2021-08-01 DOI: 10.1109/ICIEA51954.2021.9516361
Lin-Hong Xie, Hui Li, Shaodan Yang
Taking the solar hot water circulation process in absorption refrigeration as the research object, two temperature control strategies are proposed according to the operating temperature range of working pairs in the generator, and the model of solar hot water circulation is built. The tilt and azimuth of solar collector are optimized according to the maximum radiation amount per unit area of collector with Hooke-Jeeves algorithm. The area of collector is optimized according to the solar fraction specification value with 0.5. The volume of the heat storage tank is optimized according to the maximum solar fraction and minimum start stop times of generator circulating pump. The optimization method proposed can guide the design of solar hot water circulation system for solar absorption refrigeration.
以吸收式制冷中的太阳能热水循环过程为研究对象,根据发电机工作对的工作温度范围,提出了两种温度控制策略,并建立了太阳能热水循环模型。根据太阳能集热器单位面积最大辐射量,采用Hooke-Jeeves算法对集热器的倾角和方位进行优化。集热器的面积按太阳能分馏规定值0.5进行优化。根据最大太阳能利用率和发电机循环泵的最小启停次数来优化储热罐的容积。所提出的优化方法可以指导太阳能吸收式制冷太阳能热水循环系统的设计。
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引用次数: 0
Online Joint Estimation of SOC and SOP for High-rate Battery based on EKF 基于EKF的高倍率电池SOC和SOP在线联合估计
Pub Date : 2021-08-01 DOI: 10.1109/ICIEA51954.2021.9516115
Xu Wang, Qinglie Su, Peng Jin, Yuehui Wang, Denggao Huang, Cheng Li, Zhou Wei, Jing Zhao, Zhihong Liu
Aiming at the problem of high precision and high safety estimation of state of power (SOP) of high-rate lithium-ion power battery in the application of special operation vehicle, this paper analyses the working characteristics of the high-rate lithium-ion power battery, and builds the second-order RC equivalent circuit model of the battery. The recursive least squares (RLS, Recursive Least Squares) algorithm is used to identify battery parameters online, and the SOC algorithm based on the extended Kalman filter and the SOP algorithm are used for joint estimation. This algorithm is used to solve the problem that the maximum allowable power of the actual battery caused by the degradation of battery life is difficult to calculate and even causes the problem of safe fire accidents. Combined with the correction algorithm in practical engineering, it ensures the efficiency and safety of the SOP estimation during the entire life cycle of the electric vehicle. This research has an important significant guiding in engineering practice.
针对特种作业车辆中高倍率锂离子动力电池的高精度、高安全性功率状态(SOP)估计问题,分析了高倍率锂离子动力电池的工作特性,建立了高倍率锂离子动力电池的二阶RC等效电路模型。采用递归最小二乘(RLS, recursive least squares,递归最小二乘)算法在线识别电池参数,采用基于扩展卡尔曼滤波的SOC算法和SOP算法进行联合估计。该算法用于解决因电池寿命下降导致实际电池最大允许功率难以计算甚至引发安全火灾事故的问题。结合实际工程中的修正算法,保证了电动汽车全生命周期内SOP估算的效率和安全性。本研究对工程实践具有重要的指导意义。
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引用次数: 0
Development of Ultra-quiet Gravity Unloading for Micro-vibration Testing of Space Precision Payloads 空间精密载荷微振动试验超静音重力卸载的研制
Pub Date : 2021-08-01 DOI: 10.1109/ICIEA51954.2021.9516206
Chao Ma, Long Chen, Lei Liu, Qing Li, Hongjie Yang
To ensure the performance and reliability of ultra-quiet payloads in orbit, the ground test are usually carried out before launch. However, the gravity unloading system with suspension introduces redundant disturbances into ultra-quiet payloads. The gravity unloading system may affect the vibration isolation performance of the ultra-quiet payloads. To solve the problem of introducing disturbances, a gravity unloading system with high stiffness shelf and ultra-low frequency spring is designed in this paper. Testing results show that the gravity unloading system reduce the redundant disturbances to less than $2mumathrm{g}$ within the frequency range of 0.6-100Hz, which can simultaneously guarantee the gravity unloading function and ultra-quiet environment.
为了保证超安静载荷在轨道上的性能和可靠性,通常在发射前进行地面试验。然而,带悬架的重力卸载系统会给超安静载荷带来冗余干扰。重力卸载系统会影响超静音载荷的隔振性能。为解决重力卸荷系统引入扰动的问题,设计了一种高刚度架加超低频弹簧的重力卸荷系统。测试结果表明,在0.6 ~ 100hz的频率范围内,重力卸载系统将冗余干扰降低到小于$2mumathrm{g}$,可以同时保证重力卸载功能和超安静环境。
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引用次数: 2
Research on Honeycomb Multi-Station Integration System 蜂窝多工位集成系统研究
Pub Date : 2021-08-01 DOI: 10.1109/ICIEA51954.2021.9516051
Huo Qunhai, Wang Wenyong, Zhang Ningyu, Z. Jianwen, C. Guodong, Huo Liangliang, Wang Peng, Wei Tongzhen
In order to solve the challenging problem of the current distribution network operation caused by the massive access of distributed generation and electric vehicle charging piles, a honeycomb multi station fusion system is proposed in this paper. Firstly, the topology and key equipment of the multi-station integration system are analyzed, and then the hierarchical structure of the honeycomb multi-station integration system applied to the distribution network is studied. The hierarchical structure topology, networking mode and power grid architecture of multi-station integrated distribution network are discussed. Finally, the challenges faced by the future distribution network based on the new mode of multi-station integration are analyzed in terms of industry barriers, economy and reliability, multi time scale and multi spatial dimension energy interconnection, etc.
为解决分布式发电和电动汽车充电桩大量接入给当前配电网运行带来的难题,提出了一种蜂窝式多站融合系统。首先对多站集成系统的拓扑结构和关键设备进行了分析,然后对应用于配电网的蜂窝多站集成系统的分层结构进行了研究。讨论了多站综合配电网的层次结构拓扑、组网方式和电网体系结构。最后,从行业壁垒、经济性和可靠性、多时间尺度和多空间维度能源互联等方面分析了基于多站一体化新模式的未来配电网所面临的挑战。
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引用次数: 0
Key Factors Affecting the Corona Onset Voltage of Electrostatic Precipitator Electrodes 影响静电除尘器电极电晕起电压的关键因素
Pub Date : 2021-08-01 DOI: 10.1109/ICIEA51954.2021.9516427
Xin Cao, Chang-yun Li, Hongwei Yan, Qingtao Hou, Jiahua Dong, W. Wang
In this paper, based on COMSOL simulation,a simulation model of corona initiation for angular electrodes with different number of tips (quadrangular, hexagonal, octagonal), tip thickness (0.3 cm, 0.5 cm, 0.8 cm), and angle (10.72°, 16°, 20.72°) is established to investigate the effect of changes in the geometry of angular electrodes. The effect of the change of the angle electrode geometry on the corona onset voltage is investigated. By introducing the concept of equivalent radius, the effect of geometric variations in the number of tips, thickness and angle on the corona onset voltage was quantified. It was found that as the number of tips, tip thickness and angle of the angular electrode decreased, the equivalent radius of the angular electrode gradually decreased and the corona onset voltage gradually decreased; variations in the number, thickness, and angle of the unit tip had differences in the degree of influence on the corona voltage, with rates of 3.279%, 2.846%, and 0.678%, respectively.
本文基于COMSOL仿真,建立了不同针尖数(四角形、六角形、八角形)、针尖厚度(0.3 cm、0.5 cm、0.8 cm)和针尖角度(10.72°、16°、20.72°)的角电极的电晕起爆仿真模型,研究了针尖几何形状变化对电晕起爆的影响。研究了电极角度几何形状的变化对电晕起始电压的影响。通过引入等效半径的概念,量化了针尖数、厚度和角度几何变化对电晕起始电压的影响。结果表明:随着角电极尖头数、尖头厚度和角度的减小,角电极的等效半径逐渐减小,电晕起始电压逐渐降低;单位尖端数量、厚度和角度的变化对电晕电压的影响程度不同,分别为3.279%、2.846%和0.678%。
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引用次数: 0
Dosimetry Simulation Research on Electromagnetic Exposure of Wireless Charging Electric Vehicle to Human Central Nervous System 无线充电电动汽车对人体中枢神经系统电磁暴露剂量学模拟研究
Pub Date : 2021-08-01 DOI: 10.1109/ICIEA51954.2021.9516297
Wenting Mou, Mai Lu
To evaluate the safety of electromagnetic exposure of a magnetic coupling resonance wireless charging system in electric vehicles on the human central nervous system, COMSOL Multiphysics software is used to establish electric vehicle models with different materials and thicknesses, a magnetic coupling resonance wireless charging system model, and a human body model. The electromagnetic exposure of the electromagnetic field generated by the wireless charging system to the central nervous system of the human body in the electric vehicle with carbon fiber-reinforced plastics (CFRP) car body, aluminum alloy car body, and low carbon steel car body with different thickness shielding is simulated and analyzed. The simulation results show that CFRP, aluminum alloy, and low carbon steel vehicles can effectively shield electromagnetic fields. The shielding effect of CFRP and aluminum alloy car body improves with the increase of thickness, and the shielding effect of low carbon steel car body worsens with the increase of thickness. Under the worst shielding condition, the maximum magnetic induction strength and electric field strength of human head are respectively 0.9 µT and 0.18 V/m the electromagnetic exposure level to the human head is less than the public exposure limit of 27 µT and 2.97 V/m set by the International Commission on Non-Ionizing Radiation Protection. Results show that the magnetic coupling resonance wireless charging system of an electric vehicle will not harm the human central nervous system in the vehicle.
为评价电动汽车磁耦合共振无线充电系统电磁暴露对人体中枢神经系统的安全性,利用COMSOL Multiphysics软件建立了不同材料和厚度的电动汽车模型、磁耦合共振无线充电系统模型和人体模型。仿真分析了采用不同屏蔽厚度的碳纤维增强塑料(CFRP)车身、铝合金车身和低碳钢车身的电动汽车中,无线充电系统产生的电磁场对人体中枢神经系统的电磁暴露。仿真结果表明,CFRP、铝合金和低碳钢三种材质的车辆都能有效屏蔽电磁场。CFRP和铝合金车体的屏蔽效果随着厚度的增加而提高,低碳钢车体的屏蔽效果随着厚度的增加而恶化。在最坏屏蔽条件下,人体头部的最大磁感应强度和电场强度分别为0.9µT和0.18 V/m,人体头部的电磁暴露水平低于国际非电离辐射防护委员会规定的27µT和2.97 V/m的公共暴露限值。结果表明,电动汽车磁耦合共振无线充电系统不会对车内人体中枢神经系统造成伤害。
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引用次数: 0
Adaptive Tuning of Phase-Locked Loop Parameters for Grid-Connected Inverters in Weak Grid Cases 弱电网条件下并网逆变器锁相环参数的自适应调谐
Pub Date : 2021-08-01 DOI: 10.1109/ICIEA51954.2021.9516438
Zihan Ling, Jinming Xu, Yuchen Wu, Yuan Hu, Shaojun Xie
For grid-connected inverter, phase-locked loop (PLL) is a common method to synchronize the output current with the grid voltage. However, in weak grid, as the grid impedance cannot be ignored, the inverter tends to be unstable. Besides, the grid impedance can vary in the actual application, using fixed PLL parameters designed for specific grid condition cannot guarantee the inverter robustness against the grid impedance varying. Hence, this paper aims to propose an improved method to improve the typical single-phase delay-based PLL. At first, the impedance model of the inverter is established and the reason for the system stability deterioration is analyzed in detail. Then, an adaptive PLL is proposed based on the quasi-passive method for grid-impedance measurement. The PI parameters of the PLL have been adaptively adjusted online according to the measured grid impedance so as to achieve the high phase margin (PM, not less than 40°) in the weak grid. Simulation results have proved that the proposed adaptive PLL can ensure the system stability, maintain the high quality of grid current and robustness in the weak grid.
对于并网逆变器来说,锁相环(PLL)是实现输出电流与电网电压同步的常用方法。然而,在弱电网中,由于电网阻抗不可忽视,逆变器往往不稳定。此外,在实际应用中,电网阻抗会发生变化,采用针对特定电网条件设计的固定锁相环参数并不能保证逆变器对电网阻抗变化的鲁棒性。因此,本文旨在提出一种改进方法来改进典型的基于单相延迟的锁相环。首先,建立了逆变器的阻抗模型,详细分析了系统稳定性劣化的原因。然后,提出了一种基于准无源法的自适应锁相环,用于电网阻抗测量。根据测得的电网阻抗在线自适应调整锁相环的PI参数,实现弱电网的高相位裕度(PM,不小于40°)。仿真结果表明,所提出的自适应锁相环能够保证系统的稳定性,保持高质量的电网电流和弱电网的鲁棒性。
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引用次数: 0
Research of Webpage Complexity Influence on Search Behavior Based on Eye Tracking Experiment 基于眼动追踪实验的网页复杂性对搜索行为影响研究
Pub Date : 2021-08-01 DOI: 10.1109/ICIEA51954.2021.9516347
Fan Zhang, Nan Zhang, Na Shan, Feng Gao
With the development of the Internet, users use electronic devices to browse information continuously for a long time every day. Excessive information brings a lot of cognitive load to users. Many studies have shown that the complexity of the webpage design will affect the search efficiency. For e-commerce webpages, the search efficiency is directly related to the purchase rate. Therefore, through eye tracking experiments, this paper studies the influence of density factors of e-commerce webpage complexity on user search behavior performance and subjective perception, establishes the relationship between webpage visual design and user search usability, and comprehensively constructs evaluation indexes from behavior data and perceptual data. The research results of this paper provide a reference for designers how to arrange information density when designing webpages.
随着互联网的发展,用户每天长时间使用电子设备连续浏览信息。过多的信息给用户带来了很大的认知负荷。许多研究表明,网页设计的复杂性会影响搜索效率。对于电子商务网站来说,搜索效率直接关系到购买率。因此,本文通过眼动追踪实验,研究电子商务网页复杂性密度因子对用户搜索行为性能和主观感知的影响,建立网页视觉设计与用户搜索可用性之间的关系,从行为数据和感知数据综合构建评价指标。本文的研究结果为设计人员在设计网页时如何安排信息密度提供了参考。
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引用次数: 0
Review of Rotor Position and Speed Estimation Method of PMSM with Hall Sensor 基于霍尔传感器的永磁同步电机转子位置和转速估计方法综述
Pub Date : 2021-08-01 DOI: 10.1109/ICIEA51954.2021.9516155
Jiahao Wang, Q. Jiang, Dingkang Xiong
Permanent magnet synchronous motors (PMSM) are widely used in industrial control, household electrical, transportation, aerospace and other fields. The acquisition of rotor position and speed is the key to achieving high-performance control. In view of the disadvantages of the large volume and high cost of photoelectric encoders and magnetic encoders, and the limitations of sensorless control technology, the technology of driving PMSM with low-resolution position sensor can not only control the cost but also ensure the performance of the motor. Therefore, the method of estimating rotor position and speed that can improve its control accuracy and system stability has attracted wide attention from scholars at home and abroad. The working principle of the switch-type Hall position sensor is introduced, and the source of its error is systematically summarized. Taking the method of interpolation, filter and observer as the core, this paper introduces several methods of estimating high-resolution rotor position and speed. Then this paper analyzes their principles, advantages and disadvantages, and applicable conditions. Finally, it summarizes the existing achievements and looks forward to the future development trend.
永磁同步电机(PMSM)广泛应用于工业控制、家用电器、交通运输、航空航天等领域。转子位置和转速的获取是实现高性能控制的关键。针对光电编码器和磁编码器体积大、成本高的缺点,以及无传感器控制技术的局限性,采用低分辨率位置传感器驱动PMSM技术既能控制成本,又能保证电机的性能。因此,能够提高其控制精度和系统稳定性的转子位置和转速的估计方法受到了国内外学者的广泛关注。介绍了开关式霍尔位置传感器的工作原理,系统地总结了其误差来源。以插值、滤波和观测器方法为核心,介绍了几种高分辨率转子位置和转速估计方法。然后分析了它们的原理、优缺点和适用条件。最后,总结了现有的研究成果,并对未来的发展趋势进行了展望。
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引用次数: 3
期刊
2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)
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