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基于键合图的复杂机电系统动力学相似分析 总被引:1,自引:0,他引:1
以适用于多能域系统建模的键合图为工具,论述了复杂机电系统键合图相似的前提条件,推导出了键合图各要素相似所对应的动力学相似条件,在此基础上,根据基于键合图的模态分析理论,进一步进行了系统模态相似研究,给出了系统频率、振型等主要模态参数的相似关系,从而提出了复杂机电系统动力学相似的键合图分析法.利用该方法既能很容易地导出系统的相似要求,而无需知道各现象的物理方程,又可以实现用简单的单能域模型系统来对多能域原型系统进行动力模型试验和仿真研究,从而为工程中复杂机电系统的动力学相似研究提供了新的方法和思路.所提供的算例表明,该方法在指导复杂机电系统动力学仿真及模型试验时,能快速、简便而又直观地得到系统相似所需满足的相似条件. 相似文献
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复杂微系统的模拟要求建立统一的,适合于植入电网络仿真器计算的系统级模型.以热力学概念作为通用理论框架,建立多畴耦合微系统通用模型的-般性理论.利用热力学共轭参量"流"和"势"统一表达从属于不同物理域子系统的端点特性,可建立各个子系统多端口组件模型.结合广义的Kirchhoffian网络理论,建立适合于电网络仿真器计算的MEMS系统级模型.便于对MEMS系统进行反复模拟和优化设计.以静电微泵为例,阐述了这一建模方法的有效性. 相似文献
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基于键图的电机伺服系统的建模与仿真 总被引:2,自引:0,他引:2
研究电机伺服系统的键图建模方法。使用20-sim软件建立了系统动力部分的键图模型,并使用SIDOPS 语言建立了控制器的模型,对电机伺服系统的阶跃响应和启动过程进行仿真。仿真结果表明,键图建模方法适用于多能量范畴的复杂机电系统的设计与分析。 相似文献
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介绍了汽车转向系统路感的实现方法和线控转向系统结构,并在对车辆动力学分析的基础上,利用键合图理论对汽车线控转向系统的路感进行了研究.在20-sim键合图仿真软件中给出了线控转向系统键合图模型,利用键合图理论对电机电流和路感进行仿真分析,最后利用执行电机电流反馈方法得到较为理想的路感. 相似文献
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基于多智能体的作战仿真系统成员设计 总被引:2,自引:2,他引:2
介绍了应用多智能体技术设计基于HLA平台的作战仿真系统的成员设计方法、并对应用模糊推理机技术,构建仿真成员的方法进行了详细说明.该方法提高了作战仿真系统的仿真效果,是Agent技术在作战仿真系统上的探索和应用. 相似文献
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Lü Min 《系统工程与电子技术(英文版)》2008,19(3)
To study the uncertain optimization problems on implementation schedule, time-cost trade-off and quality in enterprise resource planning (ERP) implementation, combined with program evaluation and review technique (PERT), some optimization models are proposed, which include the implementation schedule model, the timecost trade-off model, the quality model, and the implementation time-cost-quality synthetic optimization model. A PERT-embedded genetic algorithm (GA) based on stochastic simulation technique is introduced to the optimization models solution. Finally, an example is presented to show that the models and algorithm are reasonable and effective, which can offer a reliable quantitative decision method for ERP implementation. 相似文献
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A calculus for services innovation 总被引:1,自引:1,他引:0
Innovation in the services area - especially in the electronic services (e-services) domain - can be systematically developed by first considering the strategic drivers and foci, then the tactical principles and enablers, and finally the operational decision attributes, all of which constitute a process or calculus of services innovation. More specifically, there are four customer drivers (i.e., collaboration, customization, integration and adaptation), three business foci (i.e., creation-focused, solution-focused and competition-focused), six business principles (i.e., reconstruct market boundaries, focus on the big picture not numbers, reach beyond existing demand, get strategic sequence right, overcome organizational hurdles and build execution into strategy), eight technical enablers (i.e., software algorithms, automation, telecommunication, collaboration, standardization, customization, organization, and globalization), and six attributes of decision informatics (i.e., decision-driven, information-based, real-time, continuously-adaptive, customer-centric and computationally-intensive). It should be noted that the four customer drivers are all directed at empowering the individual - that is, at recognizing that the individual can, respectively, contribute in a collaborative situation, receive customized or personalized attention, access an integrated system or process, and obtain adaptive real-time or just-in-time input. The developed process or calculus serves to identify the potential white spaces or blue oceans for innovation. In addition to expanding on current innovations in services and related experiences, white spaces are identified for possible future innovations; they include those that can mitigate the unforeseen consequences or abuses of earlier innovations, safeguard our rights to privacy, protect us from the always-on, interconnected world, provide us with an authoritative search engine, and generate a GDP metric that can adequately measure the growing knowledge economy, 相似文献
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论生物系统中的功能不守恒性 总被引:1,自引:0,他引:1
张知彬 《复杂系统与复杂性科学》2004,1(2):43-51
根据能量守恒定律,能量一次转换所做的总功应等于输入的总能量。但在生物系统中,能量的转换是多次的,其总功之和大于系统输入的总能量,此现象称之为功能不守恒性。能量转换效率越高,功能差别越大。能量通过细胞水平的多次转换,总功可提高至2倍左右。能量通过生态系统水平多次转换,总功可提高至1.4倍左右。通过系统内各子系统能流之和称为序能,反映了系统有序性大小,它取决于系统输入总能量和能量转换效率。根据序能原理,用GDP^2/9(GDP为国内生产总值,Q为能量总输入)反映人类社会功能和效率,要比单纯用GDP更客观。绿色GDP应同时考虑使GDP^2/Q增长最大和使自然生态系统的序能最大。人的经济行为和动物的行为对策也符合序能原理。 相似文献
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This paper is about the Wuli, Shili, Renli (WSR) systems methodology. An important concept within this, Renli, has been developed from Confucian philosophy to clarify to Chinese researchers the necessity of dealing with human relations in systems practice. At present, the only formal means of operationalizing Renli that people are exploring in China is to import from the West methods for organizing debate. However, the concept of Renli suggests that more is needed than methods alone. In particular, facilitation skills are required. It is argued that the development of facilitation skills can be enhanced if researchers can gain both theoretical and practical knowledge of group dynamics, and engage in activities of self-reflection to look at, and alter, their own roles in these dynamics and the wider sociopolitical system. There are therefore three aspects to Renli: the use of systems methods for organizing debate, the acquisition of facilitation skills, and self-reflection geared toward the development of facilitation skills and enhanced critical awareness of the politics of intervention. 相似文献
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李弋 《系统工程理论与实践》2011,(Z2):70-74
随着云计算的发展,新的应用不断涌现,但电子邮件服务依然占有着重要的地位.邮件服务器是一种I/O密集的应用.在云计算时代,越来越多的用户邮件保存在服务器端,邮件在从客户端传输到服务器端之前,邮件或者邮件的部分内容在服务器端可能已经存在.基于这种现象,提出了一种方案,通过引入计算的代价来降低通信量,从而提高邮件服务器的处理能力.对电子邮件的格式和SMTP协议进行了扩充,引入了附件和正文分离传输的模式.在邮件传输时,客户端先计算附件的散列值,并作为正文的一部分传输到服务器端,服务器端再根据散列值来判断附件是否需要传输. 相似文献
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金工工艺的优化设计 总被引:2,自引:0,他引:2
邹庆化 《系统工程理论与实践》1996,10(11):106-112
运用价值工程与运筹工程理论, 在金工工艺单项设计指标优化的基础上, 对其设计指标也进行了全面优化。 相似文献
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《系统工程理论与实践》2014,(4)
正August 10-14,2015Beijing,China The International Congress on Industrial and Applied Mathematics(IClAM)is the premier international congress in the field ofapplied mathematics held every four years under the auspices ofthe International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists and entrepreneurs fiom around the world will gather in Beijing,China for the 8th IClAM to be held at 相似文献