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发动机正时带传动系统动态特性建模与分析 被引量:3
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作者 龙尚斌 赵学智 +2 位作者 上官文斌 王军成 Ahmed Waizuddin 《内燃机学报》 EI CAS CSCD 北大核心 2019年第5期471-479,共9页
建立了适用于任意布局形式的发动机正时带传动系统模型,通过数值方法求解出系统的动态响应,得到各轮的角位移波动、张紧臂的摆角波动和各带段张力等参数.考虑带与轮的啮合作用和张紧器的迟滞特性,分析了不同温度工况、不同加速度激励下... 建立了适用于任意布局形式的发动机正时带传动系统模型,通过数值方法求解出系统的动态响应,得到各轮的角位移波动、张紧臂的摆角波动和各带段张力等参数.考虑带与轮的啮合作用和张紧器的迟滞特性,分析了不同温度工况、不同加速度激励下系统的动态响应.结果表明:正时带将曲轴的角位移波动同步传动至从动轮,张紧臂摆角、各带段张力的波动与凸轮轴负载相关;同时,激励加速度与工况温度直接影响张紧臂的摆角.给出一个实例,验证提出的模型和计算方法的有效性. 展开更多
关键词 正时带传动系统 啮合 轮系建模 动态特性 数值方法
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Contouring error modeling and simulation of a four-axis motion control system
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作者 张代林 张旭 +3 位作者 谢经明 袁楚明 陈幼平 汤漾平 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第1期141-149,共9页
A layered modeling method is proposed to resolve the problems resulting from the complexity of the error model of a multi-axis motion control system. In this model, a low level layer can be used as a virtual axis by t... A layered modeling method is proposed to resolve the problems resulting from the complexity of the error model of a multi-axis motion control system. In this model, a low level layer can be used as a virtual axis by the high level layer. The first advantage of this model is that the complex error model of a four-axis motion control system can be divided into several simple layers and each layer has different coupling strength to match the real control system. The second advantage lies in the fact that the controller in each layer can be designed specifically for a certain purpose. In this research, a three-layered cross coupling scheme in a four-axis motion control system is proposed to compensate the contouring error of the motion control system. Simulation results show that the maximum contouring error is reduced from 0.208 mm to 0.022 mm and the integration of absolute error is reduced from 0.108 mm to 0.015 mm, which are respectively better than 0.027 mm and 0.037 mm by the traditional method. And in the bottom layer the proposed method also has remarkable ability to achieve high contouring accuracy. 展开更多
关键词 layered modeling ship model machining motion control cross coupling control
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A New Control Strategy for Modeling Wind Energy Systems Using Fuzzy Cognitive Maps
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作者 Peter Groumpos Vaia Gkountroumani 《Journal of Energy and Power Engineering》 2014年第11期1859-1868,共10页
Wind energy is currently a fast-growing interdisciplinary field that encompasses many different branches of engineering and science. Modeling and controlling wind energy systems are difficult and challenging problems.... Wind energy is currently a fast-growing interdisciplinary field that encompasses many different branches of engineering and science. Modeling and controlling wind energy systems are difficult and challenging problems. The basic structure of wind turbines and some wind control system methods are briefly reviewed. The need for using advanced theories from fuzzy and intelligent systems in studying wind energy systems is identified and justified. FCMs (fuzzy cognitive maps) are used to model wind energy systems. Simulation studies are performed and obtained results are discussed. A new mathematical approach has been proposed to model dynamical complex systems, the DYFUKN (dynamic fuzzy knowledge networks). Many open problems in the areas of modeling and controlling wind energy systems are outlined. 展开更多
关键词 MODELING CONTROL energy systems wind generators fuzzy cognitive maps.
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Rigid-Flex Coupling Modeling and Simulation on Multistage Gear Transmission System
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作者 周杰 贾云献 +2 位作者 刘鑫 方彬 侠文强 《Journal of Shanghai Jiaotong university(Science)》 EI 2016年第4期457-461,共5页
As multistage gear transmission systems are complex and precise, the flexibility of shaft can influence the dynamic response of system. In order to study dynamic response of the system, we build the rigid model of gea... As multistage gear transmission systems are complex and precise, the flexibility of shaft can influence the dynamic response of system. In order to study dynamic response of the system, we build the rigid model of gear system and the finite element model of the gear shaft. virtual prototype technology, and a contrast between rigid The rigid-flex coupling model is established with the model and rigid-flex coupling model is constructed. With these methods, the dynamic responses with different rotation speeds and different loading magnitudes are examined. We also analyze the influence of shaft flexibility, rotation speeds and loading magnitudes on the vibration characteristics of gear transmission systems. 展开更多
关键词 gear transmission system virtual prototype flexible body
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