pairing element การใช้

Nevertheless , the widely existed overconstraints in the mechanisms will make the quality of the mechanisms very sensitive to the inevitable manufacturing , assembly errors ( especially , the errors resulted from the shape and position between kinematic pair elements and their axes ) . at the same time , because the internal and external uncertain factors such as non - plane characteristic of dynamic parameters of links ( such as mass distribution , inertia forces , etc . ) , bending and twist of links , and the changes of environment and operating condition are inevitable , they will form the disturbance to planar constraints and make them possess the characteristic of " uncertain "