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14 Adams/Solver Input Arguments xval A double-precision value that specifies the x value at which AKISPL is to interpolate y. zval A double-precision value that specifies the z value at which AKISPL is to interpolate y. id An integer variable that specifies the identifier of the corresponding SPLINE statement. iord An integer variable that specifies the order of the derivative that AKISPL is to return. The order is usually zero, but it can be one or two. Output Arguments array A double-precision array of length three. If iord equals zero, array(1) returns the value of y that AKISPL calculates. If iord equals one, array returns: Extended Definition ∂ y ----- ∂ x 2 y ∂ ∂ 2 ------x AKISPL accesses data in a SPLINE statement (C++ or FORTRAN), using the Akima cubic-curve fitting method to fit a spline to the data (that is, to add interpolated points), and returns one of the following: • A value for the dependent variable (y) for each value it receives for the independent variable or variables. • The first partial derivatives of the dependent variable. and , respectively. If iord equals two, array returns: Note that: ∂ y----- ∂ z 2 y ∂ ----------- ∂ x∂ z 2 y ∂ ∂ 2 -----z , , and , respectively. 2 y ∂ ∂ ----------- = ----------- ∂ z∂ x ∂ x∂ z errflg A logical (true or false) variable that AKISPL returns to the calling subroutine. If AKISPL detects an error in its calculations, it sets errflg to true before it returns errflg to the calling subroutine. • The second partial derivatives of the dependent variable. If the spline data input with the SPLINE statement has one independent variable, Adams/Solver uses a cubic polynomial to interpolate between points. If the spline data has two independent variables, Adams/Solver first uses a cubic interpolation method to interpolate between points of the first (x) 2 y
Welcome to Adams/Solver Subroutines independent variable, and then uses a linear method to interpolate between curves of the second (z) independent variable. In addition to the AKISPL data access subroutine, Adams/Solver includes the CUBSPL data access subroutine, which uses the traditional cubic curve fitting method. Use CUBSPL if the primary usage is in MOTIONs. Use AKISPL if the primary concern is with the forces or torques acting on a model. If the spline data incorporates sudden changes in value, the CUBSPL data access subroutine gives more oscillatory results for the curve or surface than AKISPL gives. However, the first and second derivatives of CUBSPL are smoother than those AKISPL calculates. ANALYS The ANALYS subroutine performs the analysis requested of it. Use Called By CONSUB Prerequisite None Calling Sequence CALL ANALYS (antype, cid, timbeg, timend, init, istat) 15
Page 1 and 2: Welcome to Adams/Solver Subroutines
Page 3 and 4: Compilers and Linkers Welcome to Ad
Page 5 and 6: Utility Subroutines About Utility S
Page 7 and 8: Subroutine: Does the following: Uns
Page 11 and 12: Input Arguments Welcome to Adams/So
Page 13: RETURN END AKISPL Welcome to Adams/
Page 21 and 22: Use Called By Any user-written subr
Page 23 and 24: T1( x - x0) = x - x0 CUBSPL , Welco
Page 25 and 26: Output Arguments Extended Definitio
Page 27 and 28: Extended Definition Welcome to Adam
Page 29 and 30: Input Arguments Output Arguments We
Page 31 and 32: Input Arguments Output Arguments Ex
Page 33 and 34: Input Arguments Welcome to Adams/So
Page 35 and 36: Use Welcome to Adams/Solver Subrout
Page 37 and 38: GETCPU retrieves CPU time used so f
Page 39 and 40: GETMOD returns the current analysis
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Page 43 and 44: Prerequisite Welcome to Adams/Solve
Page 49 and 50: C C Inputs: C INTEGER ID C C Output
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Page 57 and 58: C = [-A-1B] Welcome to Adams/Solver
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Page 61 and 62: Prerequisite STRING statement in da
Page 63 and 64: Prerequisites None Calling Sequence
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function. Welcome to Adams/Solver S
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Calling Sequence CALL IMPACT (x, x'
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Output Arguments Extended Definitio
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Input Argument Welcome to Adams/Sol
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Input Argument Welcome to Adams/Sol
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Use Called By Any user-written subr
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Use Called By SPLINE_READ Calling S
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Input Arguments Welcome to Adams/So
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`S232' Space-two: 2-3-2 `S313' Spac
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Welcome to Adams/Solver Subroutines
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Callng Sequence CALL SHF (x, x0, a,
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Calling Sequence CALL STEP5 (x, x0,
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C INTEGER IPAR(2), N_UVX, N_UVY, N_
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CALL NMODES(FBDYID,NQ,ERRFLG) STRIN
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F(M 1 (q), M 2 (q), ..., M N (q)) W
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Examples Welcome to Adams/Solver Su
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SUBROUTINE SFOSUB (ID, TIME, PAR, N
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DO 100 J = 1 , 6 DFDDIS(I,J)=0.D0 D
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Use Called By Any user-written subr
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User-Written Subroutines Welcome to
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C - Evaluate Normal Force component
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Output Arguments Welcome to Adams/S
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C X rotational field torque C ... F
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}; int NPAR; const double* PAR; int
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Using the DFLAG Variable Welcome to
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C RESULT(2) = ... RESULT(3) = ... R
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GSE_UPDATE Calling Sequence Welcome
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Use Corresponding Statement Welcome
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Output Arguments scale A double-pre
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Use Corresponding Command Calling S
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C ENDIF C C - Create request inform
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* * SENSOR struct sAdamsSensorEval
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FORTRAN - Prototype Welcome to Adam
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C C C C C C C C C C C C C C VALUES(
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C - Derivatives of prior first deri
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C C - Subroutine initialization ---
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*/ struct sAdamsVforce { int ID; in
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FORTRAN - Prototype Welcome to Adam
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Examples For an example of this sub
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