Cascade control of the friction stir welding process to seal canisters for spent nuclear fuel
作者： L. Cederqvist , O. Garpinger , T. Hägglund , A. Robertsson
DOI: 10.1016/J.CONENGPRAC.2011.08.009
关键词: Mechanical engineering 、 PID controller 、 Process (computing) 、 Cascade 、 Control theory 、 Engineering 、 Welding 、 Control theory 、 Spent nuclear fuel 、 Temperature control 、 Friction stir welding
摘要: Abstract in Undetermined This article presents the development to reliably seal copper canisters containing Swedish nuclear waste, using friction stir welding. To avoid defects and welding tool fractures, it is important control temperature within a span of 790–910 degrees C. A cascade controller used efficiently suppress fast power input disturbances reducing their impact on temperature. The tuned recently presented method for robust PID control. Results show that keeps 710 C during 40 min long joint line sequences. Apart from cascaded structure, good process knowledge strategies adapted different weld sequences have contributed successful results. (Less)
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