Second derivatives provide angular accelerations, essential for force and inertia calculations.
where (K_1, K_2, K_3) are constants derived from link lengths. A 4-bar link calculator automates this solution, handling the two possible assembly configurations (open vs. crossed). A comprehensive 4-bar link calculator typically offers: 4 bar link calculator
Given link lengths and crank angle, output the angles of the coupler and follower, plus the coupler point position. Second derivatives provide angular accelerations
[ \mathbf{r}_1 + \mathbf{r}_2 = \mathbf{r}_3 + \mathbf{r}_4 ] 4 bar link calculator