*SetMotion() - symmetric motion pair
Sets the properties of a symmetric motion pair.
Syntax
*SetMotion(motion_name, LEFT|RIGHT,
DISP|VEL|ACCL, TYPE, TOKEN)
Token
- LIN
- Enter a value for displacement, acceleration, and velocity properties.
- CRV
- Use a Curve to represent the motion behavior. See Comments.
- SPL3D
- Use a Spline3D to represent the motion behavior. See Comments.
- EXPR
- Enter a solver expression that represents the motion behavior.
Arguments
- motion_name
- The variable name of an existing motion pair.
- LEFT RIGHT
- If LEFT is specified, the properties are assigned to the left motion, and the right motion properties are made symmetric to the left motion.
- DISP VEL ACCL
- This argument identifies whether a displacement, velocity, or acceleration is being specified.
- curve_name, AKIMA|CUBIC|LINEAR|QUINTIC, `indep_variable`
- When using curve data, a curve, an interpolation method, and an independent variable must be specified, where curve_name is the variable name of an existing curve that represents the force characteristic, the interpolation method can be set to AKIMA, CUBIC, LINEAR, or QUINTIC. The indep_variable is the solver expression representing the independent variable along which the force curve is characterized.
- spl3d name, AKIMA|CUBIC|LINEAR| QUINTIC, 'indep_var1', 'indep_var2'
- When using spline3d, a Spline3D entity, an interpolation method, and two independent variables must be specified, where spl3d_name is the variable name of an existing Spline3D entity that would represent the force v/s two independent variables. The interpolation method can be set to AKIMA, CUBIC, LINEAR, or QUINTIC. indep_var1 is the solver expression for the first independent variable. indep_var2 is the solver expression that represents the second independent variable.
- `expression`
- A solver expression for the motion.
Example
*RevJointPair(j_crank_piv, "Crank pivot",
b_crank,
B_Ground,
p_crank_pivot,
p_crank_pivot_axis)
*MotionPair(crank_rot, "Crank rotation", j_crank_pivot)
*SetMotion(crank_rot, LEFT, DISP, 29)
Context
Comments
Nonlinear properties for stiffness or damping cannot be specified for a symmetric pair.
To specify non-linear properties for the torsion spring in any direction, a solver expression, curve data, or spline 3D data can be used. When using solver expressions, Templex syntax is used and all variables are enclosed in braces {} and the rest is treated as literal.
The QUINTIC interpolation method is supported for MotionSolve only.