Format

WDTZ(I, J, K, L)

Description

The WDTZ function computes the Z-component of the relative rotational acceleration of marker I with respect to marker J, as resolved in the coordinate system of marker K. The time derivatives are taken in the marker L frame.  The first argument, marker I, must be specified.  The second, third and fourth arguments (markers J, K and L) are optional.

Example

<Post_Request

    comment          = "acc-expr"

    id               = "70000044"

    type             = "EXPRESSION"

    expr1            = "NULL"

    expr2            = "ACCX(30301010,30301011,30301011)"

    expr3            = "ACCY(30301010,30301011,30301011)"

    expr4            = "ACCZ(30301010,30301011,30301011)"

    expr5            = "NULL"

    expr6            = "WDTX(30301010,30301011,30301011)"

    expr7            = "WDTY(30301010,30301011,30301011)"

    expr8            = "WDTZ(30301010,30301011,30301011)"

/>

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.

K

The resultant acceleration vector is resolved in the coordinate system of the K marker.  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.