hinge change meaning in English

改变铰链

There are two categories about micro drive equipment in this paper . one of them is drove by the combination of ac servo electromotor and ball screws , which is connected with reflective mirror using column stagger flexible hinge . the other one is drove by ac servo electromotor and ordinarily precision screws , and the flexible hinge change to flat straight round flexible hinge
微驱动组件采用两种形式,一种是由交流伺服电机带动精密滚珠丝杠通过圆柱形错位式柔性铰链驱动反射镜架,另一种方案是由交流伺服电机带动精密丝杆通过平板形直圆式柔性铰链驱动镜架。