The total change in velocity in the radial direction = dv- ω r d θРRadial acceleration = dv / dt = ω r d θ/ dt = a - ω2 r РThe total change in velocity in the tangential direction = v dθ+ ω dr + r αРTangential acceleration = v dθ/ dt + ω dr/dt + r d ω/ dt Р= v ω+ ω v + r α= α r + 2 v ωРThe acceleration vector diagram for the block is shown belowРNote : The term 2 v ω representing the tangential acceleration of the block relative to the coincident point on the link is called the ponent and results whenever a block slides along a rotating link and whenever a link slides through a swivelling blockР连杆机构Р连杆存在于车库门装置,汽车擦装置,齿轮移动装置中。它是一给予很少关注的机械工程学的组成部分。联杆是具有两个或更多运动副元件的刚性机构,用它的连接是为了传递力或运动。在每个机器中,在运动期间,联杆或者占据一相对于地面的固定位置或者作为一个整体来承载机床。这些连杆是机器主体被称为固定连杆。基于由循环的或滑动的分界面的元件连接的布局被称作连接。这类旋转的和菱形的连接机构被称作低副。高副基于
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