Prismatic

Joint allowing one translational degree of freedom along a given axis

 Description A prismatic joint, sometimes called a slider or translational joint, is shown in the diagram below with the two bodies that it connects. A prismatic joint allows a single relative translation of the two connected frames; this joint prevents all of the other relative motions of the two frames. In the diagram below, the joint displacement, s, represents the relative translation 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.   The following figure shows how the prismatic joint is represented in the 3-D Workspace and the 3-D Playback Window.

Connections

 Name Description ${\mathrm{frame}}_{a}$ Joint inboard frame ${\mathrm{frame}}_{b}$ Joint outboard frame ${\mathrm{flange}}_{a}$ Inertial reference frame for 1-D translational components ${\mathrm{flange}}_{b}$ Translation of joint. Connects to 1-D translational components

Parameters

 Symbol Default Units Description Modelica ID ${\stackrel{^}{e}}_{1}$ $⟨1,0,0⟩$ - Axis along which the joint allows translational motion, expressed in the inboard frame TranAxis ${K}_{s}$ $0$ $\frac{N}{m}$ Spring constant Kspring ${L}_{0}$ $0$ $m$ Unstretched length of the translational spring L0 ${K}_{ⅆ}$ $0$ $\frac{N\cdot s}{m}$ Damping constant Kdamper ${\mathrm{IC}}_{s,v}$ 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