| کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
|---|---|---|---|---|
| 264477 | 504102 | 2011 | 9 صفحه PDF | دانلود رایگان |
کلمات کلیدی
1.مقدمه
2. توصیف سیستم دستگاه هواساز
3. مدلسازی دینامیکی دستگاه هواساز غیر خطی
4. کنترل غیر خطی سیستم
4.1 طراحی سیستم های تنظیم کننده و ناظر
4.2 توسعه ی کنترل کننده مبتنی بر زمانبندی بهره
4.3 توسعه ی کنترل کننده مبتنی بر خطی سازی بازخورد
5. نتایج و مباحثه
6. نتیجه گیری
ضمیمه A
To maintain satisfactory comfort conditions in buildings with low energy consumption and operation cost, control of air-conditioner units is required. In this paper, nonlinear control of an air-handling unit (AHU) is investigated and compared for two control approaches: gain scheduling and feedback linearization. A nonlinear multi input–multi output model (MIMO) of an air-handling unit (AHU) is considered. Both indoor temperature and relative humidity are controlled via manipulation of valve positions of air and cold water flow rates. Using an observer to estimate state variables, a hybrid control system including regulation system for disturbance rejection and nonlinear control system for tracking objectives is designed. Achievement of tracking objectives is investigated for various desired commands of indoor temperature and relative humidity; including a sequence of steps and ramps-steps. According to results, more quick time responses with a bit more overshoot in tracking set-points/paths are achieved by using feedback linearization method (especially for temperature). However, valves position as input control signals are associated with less oscillation (and consequently less energy consumption) when the controller designed based on gain scheduling approach is used. Finally, it is shown through phase portrait of the system that the controller designed based on feedback linearization shows a robust performance in the presence of random uncertainty in model parameters.
Journal: Energy and Buildings - Volume 43, Issue 4, April 2011, Pages 805–813