笛卡兒坐標(biao)系(xi)分為左(zuo)手(shou)(shou)(shou)系(xi)和右手(shou)(shou)(shou)系(xi)。配(pei)管(guan)設計柔性分析(xi)采用(yong)右手(shou)(shou)(shou)系(xi)，右手(shou)(shou)(shou)坐標(biao)系(xi)這(zhe)名(ming)詞(ci)是(shi)由右手(shou)(shou)(shou)定則而來的(de)。先(xian)將右手(shou)(shou)(shou)的(de)手(shou)(shou)(shou)掌與(yu)(yu)手(shou)(shou)(shou)指(zhi)伸直(zhi)，然后，將中指(zhi)豎起與(yu)(yu)食(shi)指(zhi)呈直(zhi)角關(guan)(guan)系(xi)，再將大(da)拇指(zhi)往上指(zhi)去，與(yu)(yu)中指(zhi)、食(shi)指(zhi)都呈直(zhi)角關(guan)(guan)系(xi)，則大(da)拇指(zhi)、食(shi)指(zhi)、與(yu)(yu)中指(zhi)分別表示(shi)(shi)了(le)右手(shou)(shou)(shou)坐標(biao)系(xi)的(de)X軸，Y軸，與(yu)(yu)Z軸，如圖17.3所示(shi)(shi)。同樣，用(yong)左(zuo)手(shou)(shou)(shou)也可以表示(shi)(shi)出(chu)左(zuo)手(shou)(shou)(shou)系(xi)。