/SKEW/FIX

Block Format Keyword Describes the fixed skew frames.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/SKEW/FIX/skew_ID/unit_ID
skew_title
Ox Oy Oz        
X1 Y1 Z1        
X2 Y2 Z2        

Definition

Field Contents SI Unit Example
skew_ID Skew identifier

This ID must be different from all frame (/FRAME/FIX) identifiers

(Integer, maximum 10 digits)

  
unit_ID Unit Identifier

(Integer, maximum 10 digits)

  
skew_title Skew title

(Character, maximum 100 characters)

  
Ox X coordinate of skew origin O'

(Real)

 [ m ]
Oy Y coordinate of skew origin O'

(Real)

 [ m ]
Oz Z coordinate of skew origin O'

(Real)

 [ m ]
X1 X component of skew Y ' axis

(Real)

  
Y1 Y component of skew Y ' axis

(Real)

  
Z1 Z component of skew Y ' axis

(Real)

  
X2 X component of skew Z ' axis

(Real)

  
Y2 Y component of skew Z ' axis

(Real)

  
Z2 Z component of skew Z ' axis

(Real)

  

Comments

  1. For fixed skews, the skew system is fixed and is defined by Y ' and Z ' . Vectors of arbitrary length may be given.
  2. For a fixed skew, inputs are Y ' axis and Z ' axis, but X ′ axis is computed as: (1)
    X ′ = Y ' Λ Z '
    Y ' is recomputed as: (2)
    Y ″ = Z ′ Λ X ′
  3. The new fixed skew is defined by X ′ , Y ″ and Z ' .
  4. The skew origin O' is useful when defining some condition with respect to the skew in cylindrical coordinate system.

    fixed_skew_frame
    Figure 1.