کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1550775 | 998107 | 2011 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Filtered Smith predictor with feedback linearization and constraints handling applied to a solar collector field Filtered Smith predictor with feedback linearization and constraints handling applied to a solar collector field](/preview/png/1550775.png)
Feedback linearization (FL) has recently been used to control the temperature in a solar field using the water flow rate as the manipulated variable. Nevertheless, the system shows undesirable control signal oscillation caused by a delay uncertainty. In this paper, the dynamics resulting from applying the FL transformation to the nonlinear process model is approximated by a first-order model plus dead-time, and a filtered Smith predictor (FSP) is proposed as the control strategy. This controller deals with dead-time errors but also includes control signal saturation caused by flow rate constraints. Simulations demonstrate the robustness of the FSP structure in comparison to a simple PID and a Smith predictor (SP) approach when a faster closed-loop is required in a system with delay uncertainties. Real experimental results included show the improved behavior of the proposed control scheme.
Journal: Solar Energy - Volume 85, Issue 5, May 2011, Pages 1056–1067