Dérivée (implicit) (Ancien bloc)
This is an old block. Please use DIFF_c.
The implicit Derivative block provides the derivative of its input. This block imposes the algebraic constraint (x=u) on the solver, where u is the block input and x is the internal state. The solver varies the internal states to make state x follow the input's variations. The solver computes the derivatives of the state which is made available at the block output. The solver uses multi-order multi-step BDF (backward differentiation formula ) method to estimate the derivative. The accuracy of this method is higher than "du/dt" block which uses order 1 method. In order to increase the accuracy of the derivative, the user can reduce the error tolerances.
- Initial state
Initial value of the state used as initial guess to help the solver to converge toward the solution. This is specially useful at the beginning of the simulation.
Propriétés : Type 'vec' de taille 1.
- Initial Derivative
Initial value of the state derivatives used as initial guess to help the solver. The very first output of the block is the initial derivative vector.
Propriétés : Type 'vec' de taille 1.
- toujours actif: oui
- direct-feedthrough: non
- détection de passage à zéro: non
- mode: non
- entrée régulières:
- port 1 : taille [1,1] / type 1
- sorties régulières:
- port 1 : taille [1,1] / type 1
- nombre des entrées évènementielles: 0
- nombre des sorties évènementielles: 0
- possède un état continu: oui
- possède un état discret: non
- possède un état objet: non
- nom de la fonction de calcul: diffblk