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Ansoft Designer / Ansys Designer 在线帮助文档：

Nexxim Simulator >
Nexxim DC Analysis >
   DC Analysis Technical Notes >
       Nexxim DC Analysis Convergence Criteria >
           Function Check               


Function Check

The function check is also called the residue criterion. If the circuit solution at iteration k is expressed as:

The norm of the residue of this equation is:

 

The norm of the residue should approach zero as the solution converges. The function check ensures that NR has converged to a correct solution, not just to a local minimum. The function check is satisfied when:

 

The default value for reltol is 0.001 (dimensionless). The default for abstol is 1nΑ (1e-9 Amperes).



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