笛卡兒坐標(biao)系(xi)分(fen)為左(zuo)手(shou)(shou)(shou)(shou)(shou)系(xi)和右(you)手(shou)(shou)(shou)(shou)(shou)系(xi)。配(pei)管設計(ji)柔性分(fen)析采用右(you)手(shou)(shou)(shou)(shou)(shou)系(xi)，右(you)手(shou)(shou)(shou)(shou)(shou)坐標(biao)系(xi)這(zhe)名詞是由右(you)手(shou)(shou)(shou)(shou)(shou)定(ding)則而來(lai)的(de)。先將右(you)手(shou)(shou)(shou)(shou)(shou)的(de)手(shou)(shou)(shou)(shou)(shou)掌(zhang)與(yu)手(shou)(shou)(shou)(shou)(shou)指伸直，然后，將中指豎起與(yu)食指呈(cheng)(cheng)直角(jiao)(jiao)關系(xi)，再將大(da)拇(mu)指往上指去，與(yu)中指、食指都呈(cheng)(cheng)直角(jiao)(jiao)關系(xi)，則大(da)拇(mu)指、食指、與(yu)中指分(fen)別(bie)表(biao)示(shi)了右(you)手(shou)(shou)(shou)(shou)(shou)坐標(biao)系(xi)的(de)X軸(zhou)(zhou)，Y軸(zhou)(zhou)，與(yu)Z軸(zhou)(zhou)，如圖17.3所示(shi)。同(tong)樣(yang)，用左(zuo)手(shou)(shou)(shou)(shou)(shou)也可以表(biao)示(shi)出左(zuo)手(shou)(shou)(shou)(shou)(shou)系(xi)。