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how to format the codes to compute the differential-algebraic equations using ode15s?

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Tony Cheng
Tony Cheng 2024-4-4
回答： Torsten 2024-4-4
Hi guys,
I’m trying to use ode15s to solve the dynamic model of a mechanical system in the form of
where M is the mass matrix, q is the vector containing all the state variables, F is the generalised force vector, λ is the Lagrange multiplier vector, and is the constraint Jacobian matrix.
To address this problem, I change the system of equations into
where
Then how to format the codes in Matlab? Many thanks!

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回答（1 个）

Torsten
Torsten 2024-4-4
I don't see a way to use a MATLAB ode integrator to solve your system.
Take a look at
http://www.unige.ch/~hairer/software.html
Section Mechanical Systems
for suitable solvers.

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