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題名 | 綜合農場系統殘磷管理之線性系統分析=Linear System Analysis of Residual Phosphorus Management in an Integrated Farming System |
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作者姓名(中文) | 林文澤; 廖中明; | 書刊名 | 農業工程學報 |
卷期 | 45:3 1999.09[民88.09] |
頁次 | 頁41-57 |
分類號 | 434.25 |
關鍵詞 | 綜合農場系統; 回授控制系統; 控制器; 線性分析; Integrated farm system; Feedback control system; Controller; Linear analysis; |
語文 | 中文(Chinese) |
中文摘要 | 本文以線性系統理論發展一系統控制模式,探討綜合經營農場系統中殘磷管理 之策略。以線性非時變系統的二次調節器加輸出回授控制合成一最佳控制系統。應 用特殊積分二次目標函數,可將該系統中物流之變異極小化,並達成最佳控制策略。 整體控制系統設計,脈衝及步級式干擾兩者皆納入考慮,並有效合成最佳回授比例 (P)及比例加積分(PI)控制器。文中選擇台灣雲林縣一家豬/玉米綜合經營農場,針對 豬隻所排放的殘磷濃度,設計一最佳回授控制系統,以免因過量殘磷而造成環境污 染。整體模式模擬使用MATLAB軟體操作。模擬結果顯示,選擇最佳權重參數所 產生的成本,隨著欲求值而改變;當適切地調變所設計的最佳回授控制器,對農場 中殘磷濃度,能達滿意的控制效果。 |
英文摘要 | A linear system control model is developed to manage the residual phosphorus in an integrated farm system. Linear quadratic regulators (LQRs) with output feedback of a linear-invariant system are chosen for this study. The optimization and suboptimization are defined to determine an output control loop such that the integral quadratic cost function meets its minimum value. Both impulse and step disturbances are taken into account and optimal proportional (P) and proportional plus integral (PI) feedback controllers are synthesized. To illustrate this procedure, the design is applied to control residual phosphorus concentration in pig/corn farm located at Yun-Lin, Taiwan. The simulations were done in an integrated complied PC-MATLAB. Numerical results from the model implementation show that the optimal choice of weighting parameters and the resulting costs vary with desired equilibrium state. The designed optimal feedback controllers, when suitable tuned, give satisfactory control of residual phosphorus concentrations in the pig/corn farm. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。