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期刊论文 3

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分数阶系统；分岔图；分数PID控制器；陈氏多涡卷混沌系统；Genesio-Tesi混沌系统 1

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Structural dynamic analysis of the orbiting scroll wrap in the scroll compressor

Yicai LIU, Yubo XIA, Peng YAN, Yinbin LI, Haibo XIE

《能源前沿（英文）》 2013年 第7卷 第1期   页码 19-25 doi: 10.1007/s11708-012-0223-9

摘要： A deep analysis of orbiting scroll wraps was conducted in this paper by using ANSYS and SolidWorks. Through the modal analysis, the involute of the circle profile orbiting scroll wrap demonstrated a large span in natural frequencies, which led to more superiority in avoiding structural resonances. Based on the dynamic harmonic analysis, loads of frequency changes were gained and the stress and strain distribution of the orbiting scroll wrap in the most dangerous working conditions were obtained, which determined the segments with maximum stress and strain-displacement properties. Two paths defined to elucidate further the structural characteristics of the exhaust chamber provided evidence for the initial correction of orbiting wraps. The results of the present study offer a theoretical basis for the design and manufacture of scroll wraps, and providing a new way to evaluate different scroll wraps.

关键词： scroll compressor     orbiting scroll wrap     model analysis     harmonic analysis    

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Analysis of a 1 kW organic Rankine cycle using a scroll expander for engine coolant and exhaust heat

Yiji LU, Anthony Paul ROSKILLY, Long JIANG, Longfei CHEN, Xiaoli YU

《能源前沿（英文）》 2017年 第11卷 第4期   页码 527-534 doi: 10.1007/s11708-017-0516-0

摘要： The development of engine waste heat recovery technologies attracts ever increasing interests due to the rising strict policy requirements and environmental concerns. This paper presented the study of engine coolant and exhaust heat recovery using organic Rankine cycle (ORC). Eight working fluids were selected to evaluate and compare the performance of the integrated waste heat recovery system. Rather than the conventional engine ORC system mainly focusing on the utilization of exhaust energy, this work proposed to fully use the engine coolant energy by changing the designed parameters of the ORC system. The case study selected a small engine as the heat source to drive the ORC system using a scroll expander for power production. The evaluation results suggest that under the engine rated condition, the solution to fully recover the engine coolant energy can achieve a higher power generation performance than that of the conventional engine ORC system. The results suggest that adding a recuperator to the ORC system can potentially improve the system performance when the working fluids are dry and the overall dumped heat demand of the system can be reduced by 12% under optimal conditions. When the ORC evaporating and condensing temperature are respectively set at 85°C and 30°C, the integrated engine waste heat recovery system can improve the overall system efficiency by 9.3% with R600, R600a or -Pentane as the working fluid.

关键词： organic Rankine cycle     scroll expander     coolant and exhaust recovery     internal combustion engine    

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用于非线性混沌系统的基于分岔分数阶PID控制器设计方法 None

Karima RABAH, Samir LADACI, Mohamed LASHAB

《信息与电子工程前沿（英文）》 2018年 第19卷 第2期   页码 180-191 doi: 10.1631/FITEE.1601543

摘要： 提出一个新的鲁棒分数阶比例-积分-微分（FOPID）控制器，以其中一个不稳定的固定点来稳定一个扰动非线性混沌系统。基于使用分岔图的比例-积分-微分行为，分析非线性混沌系统的稳定性。提取控制器参数的初始集，其后续可通过二次准则优化。积分和微分分数阶也被二次准则识别。在两个非线性系统（陈氏多涡卷混沌系统和Genesio-Tesi混沌系统）中应用数值模拟，结果表明分数阶比例-积分-微分控制器在稳定非稳定固定点过程中，甚至在随机扰动情况下，能够提供最好的闭环系统性能。

关键词： 分数阶系统；分岔图；分数PID控制器；陈氏多涡卷混沌系统；Genesio-Tesi混沌系统    

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标题 作者 时间 类型 操作

Structural dynamic analysis of the orbiting scroll wrap in the scroll compressor

Yicai LIU, Yubo XIA, Peng YAN, Yinbin LI, Haibo XIE

期刊论文

Analysis of a 1 kW organic Rankine cycle using a scroll expander for engine coolant and exhaust heat

Yiji LU, Anthony Paul ROSKILLY, Long JIANG, Longfei CHEN, Xiaoli YU

期刊论文

用于非线性混沌系统的基于分岔分数阶PID控制器设计方法

Karima RABAH, Samir LADACI, Mohamed LASHAB

期刊论文