A variable step-size implementation of a variational method for stiff differential equations

2015 ◽  
Vol 118 ◽  
pp. 49-57 ◽  
Author(s):  
Sergio Amat ◽  
M. José Legaz ◽  
Pablo Pedregal
Keyword(s):  
Differential Equations ◽  
Variational Method ◽  
Variable Step Size ◽  
Stiff Differential Equations ◽  
Step Size ◽  
Variable Step

Variable-step-size second-order-derivative multistep method for solving first-order ordinary differential equations in system simulation

2020 ◽  
Vol 11 (01) ◽  
pp. 2050001
Author(s):  
Lei Zhang ◽  
Chaofeng Zhang ◽  
Mengya Liu
Keyword(s):  
Differential Equations ◽  
Numerical Method ◽  
Multistep Method ◽  
Second Order ◽  
Order Derivative ◽  
Variable Step Size ◽  
Variable Order ◽  
Step Size ◽  
Variable Step ◽  
The Stability

According to the relationship between truncation error and step size of two implicit second-order-derivative multistep formulas based on Hermite interpolation polynomial, a variable-order and variable-step-size numerical method for solving differential equations is designed. The stability properties of the formulas are discussed and the stability regions are analyzed. The deduced methods are applied to a simulation problem. The results show that the numerical method can satisfy calculation accuracy, reduce the number of calculation steps and accelerate calculation speed.

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