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90
Adams/Solver
Figure 1. STEP5 Function
The value x is the independent variable, x0 and x1 define the variable values at which the step begins and
ends, h0 and h1 are the initial and values of the step. The equation defining the STEP5 function is:
a = h1 – h0
∆
( x – x0) = ---------------------
( x1 – x0) STEP5
h0 ; x ≤x0
h0 a ∆ 3
10 – 15∆ 6∆ 2
⎧ ⎫
⎪ ⎪
⎪ ⎪
= ⎨ + ( ⋅[
+ ] ) ; x0 < x < x ⎬
1
⎪ ⎪
⎪ h1 ; x ≥ x1 ⎪
⎩ ⎭
The STEP5 subroutine calling sequence is identical to the STEP subroutine. For an example of a
SENSUB evaluation subroutine that calls STEP5, see SENSUB.
Caution: The value x1 must not equal x0. Equal values of x1 and x0 imply a discontinuous step,
which STEP5 cannot fit.
SUBTRACT_MASS_PROPERTY