Quadrant Control Strategy and Establishing for Modeling a Constant-Temperature-Humidity System

• Main Authors: Lin,cong-min, 林琮閔
• Other Authors: Lee jing-nang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/00940077338904571131

碩士 === 國立勤益科技大學 === 冷凍空調系 === 101 === This purpose of this study is to model constant-temperature-constant-humidity air condition system and a novel controller strategy, Quadrant Control Strategy (QCS), is applied for controlling the temperature-humidity state within the cooling space by modifying parameters of air flow, humidification, and heating. Finally, the comparison between PID and QCS methods is processed by both MATLAB simulations and literature verification for stability and astringency. The comparison result shows the QCS provides higher performance than PID in settling time, overshoot and steady-state error. The PID simulation results a ± 0.1 ℃ error in predefined environments, such like subtropical island climate, winter island climate, low temperature climate and dry desert climate, while the QCS method handling the constant-temperature-humidity rapidly with a tiny overshoot and no disturbance.