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荷电状态(SOC)的准确估计对锂离子电池的在线实时监测和安全控制具有重要意义。以中航锂电池为研究对象,选择二阶阻容(RC)模型对电池工作特性进行表征,并结合多种工况情形对锂离子电池进行研究分析。考虑到参数辨识的初值对在线辨识修正效果的影响,搭建仿真模型与电池脉冲工况特性比较验证,仿真误差在0.05 V以内。在此基础上,构建含有遗忘因子的递推最小二乘法(FFRLS)的在线参数辨识系统,对电池动态应力测试工况(DST)进行仿真预测,相对误差在1.50%以内。针对离线参数辨识的不足,采用在线参数辨识结合扩展卡尔曼(EKF)算法对工况下电池SOC进行估计。试验结果表明,在线参数辨识下,EKF算法能够有效表征系统SOC估算,相对误差精度在0.3%以内。 相似文献
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混合动力轿车的建模与仿真 总被引:3,自引:0,他引:3
该文介绍了应用电动汽车仿真软件ADVISOR 2 0 0 2对国内一汽车企业的混合动力轿车样车进行建模与仿真的研究工作。待仿真的轿车与日本本田公司的混合动力轿车Insight的动力系统结构相同 ,因此作者采用在ADVISOR中的Insight模型的基础上 ,修改其设备参数 ,重新设计其控制策略模块的模型的技术方案来进行仿真工作 ,最后给出了混合动力轿车的整车性能和工作过程的仿真结果。该研究可以帮助确定混合动力轿车动力系统的配置方案 ,为企业设计混合动力轿车提供参考。 相似文献
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快速、准确地估算锂离子电池的荷电状态(SOC)是电池管理系统的关键技术之一,有利于延长电池使用寿命并提高使用的安全性。以三元锂电池为研究对象,采用二阶阻容(RC)等效电路模型构建锂离子电池模型,通过递推最小二乘法(RLS)对等效模型参数进行在线辨识,并结合多新息无迹卡尔曼滤波(MSUKF),形成RLS-MSUKF算法,以实现锂离子电池SOC估算。采用多时刻的新息信息对估算值进行校正,以减少误差积累、增强算法的收敛性及提高锂离子电池SOC估算的精度,并在混合脉冲功率特性(HPPC)测试工况下对锂离子电池进行SOC估算。试验结果表明,HPPC工况下的SOC误差稳定控制在0.78%以内,验证了改进算法的良好性能。该算法为优化锂离子电池SOC估算提供了依据,对锂离子电池SOC估算研究具有启发意义。 相似文献
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摘要:针对电池等效电路模型参数具有时变性,难以准确辨识的问题,建立了二阶RC航空电池模型,提出了基于遗忘因子扩展递推最小二乘法(FFRELS)的参数辨识算法;同时针对电池开路电压测量时间长的问题,创建了蓄电池开路电压辨识递推模型,实现开路电压的动态估计,该方法能够准确辨识出模型的参数,有效提高蓄电池开路电压的辨识精度。最后通过仿真实验,验证了该方法能够提高电池模型参数的辨识精度。 相似文献
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《自动化仪表》2021,(6)
电池荷电状态(SOC)作为电池管理系统(BMS)后续控制、管理、诊断中的基本参数之一,其实时精确的估算对于BMS的可靠性与准确性有着重要的影响。在SOC估算算法中,卡尔曼滤波算法凭借着估算精度高、实用性好等优点被广泛应用。卡尔曼滤波算法估算SOC主要包括3个步骤。首先介绍了电池模型,对于常用的电等效电路模型进行了详细的分析,包括Rint模型、Randles模型、nRC模型。接着,讲解了电池模型与卡尔曼滤波算法结合的2个步骤,即状态空间方程的离散化及参数辨识。然后,重点探讨和比较了几种卡尔曼算法的基本原理以及应用的不同,主要包括扩展卡尔曼滤波算法、无迹卡尔曼滤波算法和立方卡尔曼滤波算法。最后,通过对卡尔曼滤波算法在车用锂离子电池SOC估算中应用的分析,总结出了可以进一步提高SOC估算精度以及实用性的建议。 相似文献
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互连线分布电路阶跃响应上升时间的精确推算 总被引:1,自引:1,他引:1
采用MatLab软件对Wang[1]氏公式编程,对互连线1阶至2000阶RC梯形电路模型进行仿真,精确地推得其分布电路单位阶跃响应的上升时间,从而使低阶模型阶跃响应上升时间的误差估计有了科学依据。结果表明,16阶以下的低阶RC梯形电路模型误差大于5%,20阶误差为5%,100阶的误差约1%。结果对超大规模集成电路设计中互连线RC梯形电路低阶模型阶数的确定及其误差修正提供依据。 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
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融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
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潘丽 《自动化与仪器仪表》2014,(7):80-82
自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。 相似文献
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Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
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张涛 《计算机测量与控制》2015,23(1):86-89
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值. 相似文献
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Jacob Palme 《Software》1979,9(9):741-747
The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users. 相似文献