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换热网络模型预测控制中的滚动优化策略
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作者 俞巧心 崔国民 《能源研究与信息》 2012年第1期46-52,共7页
针对换热网络具有非线性、滞后性、约束性等特性,提出将模型预测控制算法应用到换热网络的控制中,并对其滚动优化策略进行深入研究。首先,建立以综合费用最少的换热网络模型及目标函数,然后引入最速下降法对换热网络进行优化,以获得下... 针对换热网络具有非线性、滞后性、约束性等特性,提出将模型预测控制算法应用到换热网络的控制中,并对其滚动优化策略进行深入研究。首先,建立以综合费用最少的换热网络模型及目标函数,然后引入最速下降法对换热网络进行优化,以获得下一步的最优旁路开度,实时计算,实现换热网络模型预测控制中的滚动优化策略。通过算例证明:采用滚动优化策略能够快速、准确地计算出每一步的最优旁路开度,在保证出口温度达到目标值的同时使系统经济效益有所提升。 展开更多
关键词 换热网络 模型预测控制 滚动优化 最速下降法 旁路开度
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The Influence of Modulated Slotted Synthetic Jet on the Bypass of Hump
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作者 Petr Pick Miroslav Andrle Vladislav Saila Milan Matej ka 《Journal of Mechanics Engineering and Automation》 2014年第3期225-233,共9页
This paper deals with the influence of phase modulated synthetic jet on the aerodynamics of the hump in a closed test section Of the Eiffel-type wind tunnel. Three experimental methods of measurement techniques of thi... This paper deals with the influence of phase modulated synthetic jet on the aerodynamics of the hump in a closed test section Of the Eiffel-type wind tunnel. Three experimental methods of measurement techniques of this phenomenon were used: the pressure profile using the Kiel total pressure probe, the velocity profile using the CTA (constant temperature anemometry) probe and the visualization of the flow field using the hot film and the thermo camera, The experimental results with and without the influence of the synthetic jet were compared, as well the impact of the phase shift of the neighbouring synthetic jets. As a reference case, the flow around the hump without the influence of the synthetic jet was selected. The results of the measurement are presented in figures and compared. 展开更多
关键词 Synthetic jet Kiel probe CTA probe loss coefficient phase shift modulation.
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