SimMechanics | ![]() ![]() |
Represent a disassembled cylindrical joint, with one translational DoF and one rotational DoF along and about misaligned axes, with no constraints
Library
Description
The Disassembled Cylindrical block represents a composite joint, one translational and one rotational degrees of freedom (DoF) along and about a pair of specified misaligned axes between two bodies. SimMechanics automatically assembles (aligns) the two axes at simulation start.
A cylindrical joint is composite, with two DoFs and a single specified axis: a prismatic primitive translating along the axis, and a revolute primitive rotating about the axis. There are no constraints between the two primitives.
This block is disassembled: you must connect each side of the Joint block to a Body block at a Body coordinate system (CS) point, but the origins of these Body CSs do not need to be spatially collocated points or lie along a joint axis.
You can connect any Joint block to two and only two Body blocks, and Joints have a default of two Connector Ports for connecting to base and follower Bodies. The disassembled translation-rotation joint axes are associated with the base and follower Bodies, respectively.
You can only use a Disassembled Joint block to close a loop. One loop must have no more than one disassembled joint. You cannot connect a Disassembled Joint to an Actuator or Sensor block.
Disassembled cylindrical axes of follower (blue) and base (red)
Dialog Box and Parameters
The dialog box has two active areas, Connection parameters and Parameters.
Connection Parameters
Disassembled Cylindrical base and follower Body Connector Ports
Parameters
The entries on the Axes pane are required. They specify the directions of the two misaligned axes of the translational-rotational DoFs that the Disassembled Cylindrical represents.
[1 0 0]
and [0 1 0]
, respectively. The axes are directed vectors whose overall signs matter.WORLD
.See Also
Cylindrical, Disassembled Prismatic, Disassembled Revolute, Disassembled Spherical
See Modeling Joints for more on representing DoFs with Disassembled Joints.
See Checking Schematic Topology and How SimMechanics Works for more on closed loops and cutting disassembled joints.
![]() | Cylindrical | Disassembled Prismatic | ![]() |