笛卡(ka)兒坐(zuo)標系(xi)(xi)分(fen)為(wei)左(zuo)(zuo)手(shou)(shou)系(xi)(xi)和(he)右(you)(you)手(shou)(shou)系(xi)(xi)。配(pei)管設計柔(rou)性分(fen)析(xi)采(cai)用(yong)右(you)(you)手(shou)(shou)系(xi)(xi)，右(you)(you)手(shou)(shou)坐(zuo)標系(xi)(xi)這名詞是由右(you)(you)手(shou)(shou)定則而來(lai)的(de)。先將(jiang)右(you)(you)手(shou)(shou)的(de)手(shou)(shou)掌與手(shou)(shou)指伸直(zhi)(zhi)，然后(hou)，將(jiang)中(zhong)指豎起(qi)與食指呈直(zhi)(zhi)角關(guan)系(xi)(xi)，再將(jiang)大(da)拇指往上(shang)指去(qu)，與中(zhong)指、食指都(dou)呈直(zhi)(zhi)角關(guan)系(xi)(xi)，則大(da)拇指、食指、與中(zhong)指分(fen)別表(biao)示(shi)了右(you)(you)手(shou)(shou)坐(zuo)標系(xi)(xi)的(de)X軸，Y軸，與Z軸，如圖17.3所(suo)示(shi)。同樣，用(yong)左(zuo)(zuo)手(shou)(shou)也可以表(biao)示(shi)出左(zuo)(zuo)手(shou)(shou)系(xi)(xi)。