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Dérivée (implicit)

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Contenu

Palette

Description

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.

Boîte de dialogue

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Propriétés par défaut

Fonction d'interface

Fonction de calcul

Auteurs

Masoud Najafi INRIA