平行機構於兩軸太陽追蹤裝置設計與模擬

Abstract

本計畫利用平行機構具有高剛性結構特點，設計抗強風的追日機構。追日機構由兩個獨立伺服馬達驅動平面導螺桿。導螺桿移動滑塊，透過支撐連桿與乘載太陽能板之上平台相連結，產生二自由度旋轉位移。上平台連桿一側連結處，採用向上偏移設計，可以避免追日機構大角度位移，機構奇異點產生，且對接頭的種類作兩種類型的機構分析與模擬。追日機構最大位移，在東西方向可達約180度的旋轉位移，南北方向轉動位移約90度。輸入滑軌長度約為1.7公尺，另一滑軌約為0.8公尺，機構高度約為1.9公尺，總占地面積約為1.4平方公尺。追日機構能讓上平台追隨太陽移動使高聚光型太陽能板產生最大電能轉換效益。

The program used the structure with high rigidity of the parallel manipulator to design the sun-tracking mechanism which could resist the strong wind. The mechanism used two independent servo motors to drive flat lead screw. Lead screws move the sliders which connect up platform with support leads to result two degrees of freedom rotation displacement. The side that the support rod links of the up platform uses the offset design to avoid the mechanism meets the singular points when the mechanism moves with large angle displacement. Discuss the joints of the mechanism and fall into two main groups. The mechanism could up to 180 degrees of rotation on the east-west direction and about 90 degrees on the north-south direction. The length of the rail is about 1.7m and another is about 0.8m. The height of the mechanism is about 1.9m. The total area of mechanism is about 1.4m2. The mechanism could let the up platform allow the location of sun and the CPV could produce the maximum power conversion efficiency.