Cylindrical

Joint allowing 1 translational and 1 rotational degree of freedom about or along a common axis

 Description A cylindrical joint is shown in the diagram below with the two bodies that it connects.  A cylindrical joint allows the two connected frames to translate along and rotate about a single common axis; this joint type prevents all of the other relative motions of the two frames. In the diagram below, the joint displacements, s and θ, represent the relative translation and rotation, respectively, of the end frame, ${x}_{2}{y}_{2}$${z}_{2},$with respect to the start frame, ${x}_{1}{y}_{1}$${z}_{1}$. In this example, both ${x}_{1}$ and ${x}_{2}$ remain parallel to the joint axis during the motion of the two bodies.

Connections

 Name Description ${\mathrm{frame}}_{a}$ Joint inboard frame ${\mathrm{frame}}_{b}$ Joint outboard frame

Parameters

 Symbol Default Units Description Modelica ID ${\stackrel{^}{e}}_{1}$ $\left[0,0,1\right]$ - Axis along and about which the joint allows translational and rotational motion, expressed in the inboard frame RotTranAxis ${\mathrm{IC}}_{s,v}$ Ignore - Indicates whether MapleSim ignores, tries to enforce, or strictly enforces the translational initial conditions MechTranTree ${s}_{0}$ $0$ $m$ Initial displacement of the joint at the start of the simulation, expressed along the ${\stackrel{^}{e}}_{1}$axis InitPos ${v}_{0}$ $0$ $\frac{m}{s}$ Initial velocity of the joint at the start of the simulation, expressed along the ${\stackrel{^}{e}}_{1}$axis InitVel ${\mathrm{IC}}_{\mathrm{θ},\mathrm{ω}}$ Ignore - Indicates whether MapleSim ignores, tries to enforce, or strictly enforces the rotational initial conditions MechRotTree ${\theta }_{0}$ $0$ $\mathrm{rad}$ Initial rotation of the joint at the start of the simulation, expressed about the ${\stackrel{^}{e}}_{1}$axis InitAng ${\omega }_{0}$ $0$ $\frac{\mathrm{rad}}{s}$ Initial velocity of the joint at the start of the simulation, expressed about the ${\stackrel{^}{e}}_{1}$axis InitAngVel