*SetMotion() - single motion with user subroutine

Sets the properties of a motion with a user subroutine.

Syntax

*SetMotion(motion_name, USER, `solver_expression`) 
*Set(motion_name.use_local_dll, TRUE|FALSE) 
*Set(motion_name.local_dll, "string")

Arguments

motion_name
The variable name of an existing motion.
Data type: varname
USER
This argument indicates that a user subroutine is used to compute solver variable properties.
solver_expression
A solver expression enclosed in back quotes to specify arguments for the user subroutine.
motion_name.use_local_dll
Specifies if a user subroutine DLL is specific to the instance of one motion entity.
Data type: boolean
motion_name.local_dll
The path and filename for the user subroutine DLL to be used with an instance of the user defined motion.
Data type: string

Example

*RevJoint(j_crank_piv,	"Crank pivot",
                        b_crank,
                        B_Ground,
                        p_crank_pivot,
                        p_crank_pivot_axis)
*Motion(crank_rot, 	"Crank rotation", j_crank_piv)
*SetMotion(crank_rot, DISP, `360D*TIME`)
*Motion(mounting, 	"Mounting", 	j_crank_piv)
*SetMotion(mtn1, VEL, ds.real1.value + ds.real2.value)

*Motion( mtn_stwheel, "Steering motion", j_stwheel)
*Curve( crv_mtn, "Steering input")
*SetMotion(mtn_stwheel, DISP, crv_mtn.interp(AKIMA, `TIME`))
*SetMotion(mtn_stwheel, DISP, `USER({ crv_mtn.id, %d })`)

Context

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

Comments

Templex syntax is used in solver expressions. All variables are enclosed in braces {} and the rest of the expression is treated as literal. Solver expressions are enclosed in back quotes. Curve data can be used to define a motion by specifying an existing curve, interpolation method, and an independent variable. For example, 
curve_name.interp(CUBIC, `{DM}`)

where curve_name is the variable name of an existing curve. The interpolation method can be set to AKIMA, CUBIC, or PWL, and the independent variable is specified in Templex syntax.