Opened 9 years ago

Last modified 9 years ago

#3511 assigned defect

BackendDAEUtil.tryToSolveOrDerive don't use functionTree — at Version 5

Reported by: Vitalij Ruge Owned by: Vitalij Ruge
Priority: high Milestone: Future
Component: Backend Version:
Keywords: Cc: Willi Braun, Patrick Täuber

Description (last modified by Vitalij Ruge)

Differentiate.differentiateExpSolve,ExpressionSolve.solve2 in tryToSolveOrDerive need for correct handling of functions the functionTree.

Example:

model testTearing
  function f
    input Real t;
    output Real y;
  algorithm
    y := 2 * t;
  end f;

  Real a annotation(tearingSelect = always);
  Real b;
  Real _a annotation(tearingSelect = always);
  Real _b;
equation
  a = b + f(b);
  b = sin(a) + 3 * f(b);
  _a = _b + 2 * _b;
  _b = sin(_a) + 3 * 2 * _b;
end testTearing;

It should be possible to find same tearing for a,b loke for _a,_b

Change History (5)

comment:1 by Vitalij Ruge, 9 years ago

Cc: Willi Braun added

comment:2 by Vitalij Ruge, 9 years ago

Cc: Patrick Täuber added

comment:3 by Lennart Ochel, 9 years ago

Component: Unknown → Backend

Can you provide a (small) test case?

comment:4 by Vitalij Ruge, 9 years ago

Description: modified (diff)

comment:5 by Vitalij Ruge, 9 years ago

Description: modified (diff)
Note: See TracTickets for help on using tickets.