Format

WDTM(I, J, L)

Description

The WDTM function computes the magnitude of the total relative rotational acceleration between markers I and J.  Time derivatives are calculated in the reference frame of marker L.  The first argument, marker I, must be specified.  The second and third arguments are optional.

Example

<Post_Request

    comment          = "WM-WDTM-HAVSIN-FORSIN-DIM-ACOS"

    id               = "3"

    type             = "EXPRESSION"

    expr1            = "NULL"

    expr2            = "WM(30102010)"

    expr3            = "WDTM(30102010)"

    expr4            = "HAVSIN(TIME,1.,0.,4.,1.)"

    expr5            = "NULL"

    expr6            = "FORSIN(TIME,0.1,6.28,0.1,0.2)"

    expr7            = "DIM(TIME,1.0)"

    expr8            = "ACOS(COS(TIME))"

/>

Arguments

I

The marker whose acceleration is to be computed.

J

The marker with respect to which the acceleration is to be computed.  This argument is optional.  If omitted, it defaults to the ground coordinate system.

L

Time derivatives are taken in the coordinate system of this marker.  This argument is optional. If omitted, it defaults to the ground coordinate system.