کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
699852 | 1460707 | 2015 | 23 صفحه PDF | دانلود رایگان |
• The key objective of control for transient/electronics cooling is dryout avoidance.
• Nonlinearity is better divided with endogenous signals than evaporator heat-load.
• A gain-scheduled controller was designed by blending local robust controllers.
• Static optimization guarantees optimal and safe operations of VCC at steady state.
• Combining control and operating point switching enhances disturbance rejection.
Two-phase cooling is attractive for high heat-flux applications arising in high-power electronics such as LEDs, all-electric vehicles, and radar systems. A key challenge is critical heat-flux that could cause device damage due to dryout. This paper discusses a systematic design of robust and gain-scheduled controls for dryout avoidance in vapor compression cycles. Linear models from various operating points (OP) are clustered to reduce model nonlinearity. H∞H∞ controllers are synthesized to reach local robust stability. The gain-scheduled controller combining local controllers and OP switching shows excellent disturbance rejection performance in experimental comparison with the open-loop operation.
Journal: Control Engineering Practice - Volume 39, June 2015, Pages 67–89