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Revision **1167** -
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*Wed Jan 17 09:32:29 2007 UTC*
(12 years, 10 months ago)
by *johnpye*

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Added (failing) test case for do_sensitivity_all.

1 | (* ASCEND modelling environment |

2 | Copyright (C) 1996 Carnegie Mellon University |

3 | Copyright (C) 2006 Carnegie Mellon University |

4 | |

5 | This program is free software; you can redistribute it and/or modify |

6 | it under the terms of the GNU General Public License as published by |

7 | the Free Software Foundation; either version 2, or (at your option) |

8 | any later version. |

9 | |

10 | This program is distributed in the hope that it will be useful, |

11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |

12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |

13 | GNU General Public License for more details. |

14 | |

15 | You should have received a copy of the GNU General Public License |

16 | along with this program; if not, write to the Free Software |

17 | Foundation, Inc., 59 Temple Place - Suite 330, |

18 | Boston, MA 02111-1307, USA. |

19 | *) |

20 | REQUIRE "system.a4l"; |

21 | IMPORT "sensitivity/sensitivity"; |

22 | (* |

23 | A very simple test model for the external sensitivity analysis |

24 | module. |

25 | |

26 | by Ben Allan, 1996 |

27 | Self-testing added by John Pye, 2007 |

28 | |

29 | --- old comments (don't seem to be accurate) --- |

30 | |

31 | This module is used to calculate the sensitity matrix dX/dU where |

32 | X is a vector OF vapor compositions and U is a vector OF liquid |

33 | compositions. This sensitivity matrix is THEN used to calculate |

34 | J, the Jacobian, as described IN Fidkowski et al. (1995). |

35 | *) |

36 | |

37 | MODEL sensitivity_test; |

38 | nc IS_A integer_constant; |

39 | X[1..nc] IS_A solver_var; |

40 | U[1..nc] IS_A solver_var; |

41 | dx_du[1..nc][1..nc] IS_A solver_var; |

42 | |

43 | (* system for investigation *) |

44 | k,x,y,u IS_A solver_var; |

45 | k*x - y = 7; |

46 | y = u^2; |

47 | (* hence, dx/du = 2*u/k *) |

48 | |

49 | nc:==1; |

50 | u,U[1] ARE_THE_SAME; |

51 | x,X[1] ARE_THE_SAME; |

52 | |

53 | METHODS |

54 | METHOD values; |

55 | FOR j IN [1..nc] DO |

56 | U[j] := j; |

57 | END FOR; |

58 | END values; |

59 | |

60 | METHOD specify; |

61 | FIX u, k; |

62 | END specify; |

63 | |

64 | METHOD on_load; |

65 | RUN reset; |

66 | RUN values; |

67 | END on_load; |

68 | |

69 | METHOD analyse; |

70 | EXTERNAL do_sensitivity(SELF,U[1..nc],X[1..nc],dx_du[1..nc][1..nc]); |

71 | END analyse; |

72 | |

73 | METHOD self_test; |

74 | FOR i IN [1..nc] DO (* X[i] *) |

75 | FOR j IN [1..nc] DO (* U[j] *) |

76 | ASSERT abs(dx_du[i][j] - 2*U[j]/k) < 0.00001 * 2 * U[j]/k; |

77 | END FOR; |

78 | END FOR; |

79 | END self_test; |

80 | END sensitivity_test; |

81 | |

82 | MODEL sensitivity_test_all REFINES sensitivity_test; |

83 | U_new[1..nc] IS_A real; |

84 | stepsize IS_A real_constant; |

85 | stepsize :== 0.0001; |

86 | METHODS |

87 | METHOD analyse; |

88 | EXTERNAL do_sensitivity_all(SELF,U[1..nc],U_new[1..nc],stepsize); |

89 | END analyse; |

90 | |

91 | METHOD self_test; |

92 | ASSERT 1==0; |

93 | END self_test; |

94 | END sensitivity_test_all; |

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