笛卡(ka)兒坐標系(xi)(xi)分(fen)為左(zuo)手(shou)(shou)(shou)(shou)(shou)系(xi)(xi)和右(you)手(shou)(shou)(shou)(shou)(shou)系(xi)(xi)。配管(guan)設計(ji)柔性分(fen)析采用(yong)(yong)右(you)手(shou)(shou)(shou)(shou)(shou)系(xi)(xi)，右(you)手(shou)(shou)(shou)(shou)(shou)坐標系(xi)(xi)這名詞(ci)是由右(you)手(shou)(shou)(shou)(shou)(shou)定則而(er)來的。先將(jiang)右(you)手(shou)(shou)(shou)(shou)(shou)的手(shou)(shou)(shou)(shou)(shou)掌與(yu)(yu)手(shou)(shou)(shou)(shou)(shou)指(zhi)(zhi)(zhi)(zhi)伸(shen)直，然后(hou)，將(jiang)中(zhong)指(zhi)(zhi)(zhi)(zhi)豎(shu)起(qi)與(yu)(yu)食(shi)指(zhi)(zhi)(zhi)(zhi)呈直角關系(xi)(xi)，再將(jiang)大(da)拇指(zhi)(zhi)(zhi)(zhi)往上指(zhi)(zhi)(zhi)(zhi)去，與(yu)(yu)中(zhong)指(zhi)(zhi)(zhi)(zhi)、食(shi)指(zhi)(zhi)(zhi)(zhi)都呈直角關系(xi)(xi)，則大(da)拇指(zhi)(zhi)(zhi)(zhi)、食(shi)指(zhi)(zhi)(zhi)(zhi)、與(yu)(yu)中(zhong)指(zhi)(zhi)(zhi)(zhi)分(fen)別(bie)表示(shi)(shi)了右(you)手(shou)(shou)(shou)(shou)(shou)坐標系(xi)(xi)的X軸(zhou)(zhou)，Y軸(zhou)(zhou)，與(yu)(yu)Z軸(zhou)(zhou)，如圖17.3所示(shi)(shi)。同樣，用(yong)(yong)左(zuo)手(shou)(shou)(shou)(shou)(shou)也可以表示(shi)(shi)出(chu)左(zuo)手(shou)(shou)(shou)(shou)(shou)系(xi)(xi)。