*SetMotion() - symmetric motion pair

Sets the properties of a symmetric motion pair.

Syntax

*SetMotion(motion_name, LEFT|RIGHT, 
                                  DISP|VEL|ACCL, TYPE, TOKEN)

Token

If you select this TYPE, use this TOKEN

LIN

Enter a value for displacement, acceleration, and velocity properties.

Token: Value

CRV

Use a Curve to represent the motion behavior. See Comments.

Token: curve_name,

AKIMA|CUBIC|LINEAR|QUINTIC,

`indep_variable`

SPL3D

Use a Spline3D to represent the motion behavior. See Comments.

Token: spl3d_name,

AKIMA|CUBIC|LINEAR|QUINTIC

'indep_var1',

'indep_var2'

EXPR

Enter a solver expression that represents the motion behavior.

Token: `expression`

Arguments

motion_name: The variable name of an existing motion pair.; Data type: varname
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.; If RIGHT is specified, the properties are assigned to the right motion, and the left motion properties are made symmetric to the right 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

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

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.