![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
目前我国采用的是国际坐标系,又称欧美坐标系,x由重心指向机头,y由重心指向右,根据右手定律,z轴朝下。在上世纪我国曾经采用过前苏联的坐标系,该坐标系x轴由重心指向机头,y轴由重心指向上,那么根据右手定律,z轴是由重心指向 。At present, China adopts the international coordinate system, where x-axis points from CG to the nose, and y-axis points from CG to the right. According to the right-hand system, the z-axis points downward.In the last century, China used the USSR coordinate system. The x-axis points from CG to the nose, and y-axis points upward. According to the right-hand system, the z-axis points .