笛(di)卡兒坐標系(xi)(xi)(xi)分為(wei)左手(shou)系(xi)(xi)(xi)和右手(shou)系(xi)(xi)(xi)。配(pei)管設(she)計(ji)柔(rou)性分析采用右手(shou)系(xi)(xi)(xi)，右手(shou)坐標系(xi)(xi)(xi)這名詞是由右手(shou)定則而來的(de)。先將(jiang)右手(shou)的(de)手(shou)掌與(yu)手(shou)指(zhi)(zhi)(zhi)(zhi)伸直，然后(hou)，將(jiang)中(zhong)(zhong)指(zhi)(zhi)(zhi)(zhi)豎起(qi)與(yu)食指(zhi)(zhi)(zhi)(zhi)呈直角關系(xi)(xi)(xi)，再將(jiang)大(da)拇指(zhi)(zhi)(zhi)(zhi)往上指(zhi)(zhi)(zhi)(zhi)去，與(yu)中(zhong)(zhong)指(zhi)(zhi)(zhi)(zhi)、食指(zhi)(zhi)(zhi)(zhi)都呈直角關系(xi)(xi)(xi)，則大(da)拇指(zhi)(zhi)(zhi)(zhi)、食指(zhi)(zhi)(zhi)(zhi)、與(yu)中(zhong)(zhong)指(zhi)(zhi)(zhi)(zhi)分別表示了(le)右手(shou)坐標系(xi)(xi)(xi)的(de)X軸，Y軸，與(yu)Z軸，如圖17.3所示。同樣，用左手(shou)也(ye)可以表示出左手(shou)系(xi)(xi)(xi)。