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一种反压自适应恒流喷嘴工作原理及实验研究
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作者 李芳 王中伟 张为华 《国防科技大学学报》 EI CAS CSCD 北大核心 2007年第2期15-18,共4页
应水反应金属燃料发动机启动过程对水流量的苛刻要求,提出一种新型反压自适应恒流喷嘴。理论分析此喷嘴的流量自适应保持原理,通过流量特性实验验证此喷嘴能够自动调节流阻,实现流量恒定。
关键词 反压自适应 流量恒定 喷嘴 应金属燃料发动机
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A new adaptive bending method using closed loop feedback control 被引量:4
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作者 T.WELO B.GRANLY 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第11期2111-2117,共7页
As the competition from companies in low cost countries increases,the need for more automated production which reduces labour cost while improving product quality is required.A new rotary compression bending set-up wi... As the competition from companies in low cost countries increases,the need for more automated production which reduces labour cost while improving product quality is required.A new rotary compression bending set-up with automated closed-loop feedback control is thus being developed.By transferring in-process measurement data into an algorithm for predicting springback and bend angle prior to the unloading sequence,the dimensional accuracy is improved.This work focuses on the development of this steering model.Since the method used does not increase cycle time,it is attractive for high-volume industrial applications.More than 150 bending tests of AA6060 extrusions were conducted to determine the capability of the technology.The results show that by activating the automated closed-loop feedback system,the dimensional accuracy of the bent parts is more than three times better than that obtained by traditional compression bending.Since the steering model permits the direct use of additional process data,such as instant wall thickness and cross sectional distortions,it is believed that extension of the measurement capabilities would improve the accuracy of the methodology even further. 展开更多
关键词 adaptive bending closed-loop feedback dimensional accuracy SPRINGBACK aluminium EXTRUSION
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