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• W3043901640 abstract "The design of multibody systems involves high fidelity and reliable techniques and formulations that should help the analyst to make reasonable decisions. Given that constrained equations of motion for the simplest of multibody systems are highly nonlinear, determining the sensitivity terms is a computationally intensive and complex process that requires the application of special procedures. In this article, two novel Hamiltonian-based approaches are presented for efficient sensitivity analysis of general multibody systems. The developed direct differentiation and the adjoint methods are based on constrained Hamilton's canonical equations of motion. This formulation provides solutions, which are more stable as compared to the results of direct integration of equations of motion expressed in terms of accelerations due to a reduced differential index of the underlying system of differential-algebraic equations and explicit constraint imposition at the velocity level.The proposed Hamiltonian based methods are both capable of calculating the sensitivity derivatives and keeping the growth of constraint violation errors at a reasonable rate. The Hamiltonian-based procedures derived herein appear to be good alternatives to existing methods for sensitivity analysis of general multibody systems." @default.
• W3043901640 created "2020-07-29" @default.
• W3043901640 creator A5042094685 @default.
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• W3043901640 date "2020-08-20" @default.
• W3043901640 modified "2023-10-17" @default.
• W3043901640 title "Hamiltonian direct differentiation and adjoint approaches for multibody system sensitivity analysis" @default.
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• W3043901640 doi "https://doi.org/10.1002/nme.6512" @default.
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