Geometric Methods for Adjoint Systems
Geometric Methods for Adjoint Systems
复制标题
伴随系统的几何方法
DOI:
10.1007/s00332-023-09999-7
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发表时间:
2023
影响因子:
3
通讯作者:
Leok, Melvin
中科院分区:
文献类型:
--
作者:
Tran, Brian Kha;Leok, Melvin
Adjoint systems are widely used to inform control, optimization, and design in systems described by ordinary differential equations or differential-algebraic equations. In this paper, we explore the geometric properties and develop methods for such adjoint systems. In particular, we utilize symplectic and presymplectic geometry to investigate the properties of adjoint systems associated with ordinary differential equations and differential-algebraic equations, respectively. We show that the adjoint variational quadratic conservation laws, which are key to adjoint sensitivity analysis, arise from (pre)symplecticity of such adjoint systems. We discuss various additional geometric properties of adjoint systems, such as symmetries and variational characterizations. For adjoint systems associated with a differential-algebraic equation, we relate the index of the differential-algebraic equation to the presymplectic constraint algorithm of Gotay et al. (J Math Phys 19(11):2388–2399, 1978). As an application of this geometric framework, we discuss how the adjoint variational quadratic conservation laws can be used to compute sensitivities of terminal or running cost functions. Furthermore, we develop structure-preserving numerical methods for such systems using Galerkin Hamiltonian variational integrators (Leok and Zhang in IMA J. Numer. Anal. 31(4):1497–1532, 2011) which admit discrete analogues of these quadratic conservation laws. We additionally show that such methods are natural, in the sense that reduction, forming the adjoint system, and discretization all commute, for suitable choices of these processes. We utilize this naturality to derive a variational error analysis result for the presymplectic variational integrator that we use to discretize the adjoint DAE system. Finally, we discuss the application of adjoint systems in the context of optimal control problems, where we prove a similar naturality result.
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影响因子:
0.8
作者:
A. Echeverŕıa;Jesús Marín;M. Muñoz;N. Román
通讯作者:
N. Román
DOI:
--
发表时间:
1979
期刊:
Annales De L Institut Henri Poincare-physique Theorique
影响因子:
--
作者:
M. J. Gotay;J. M. Nester
通讯作者:
M. J. Gotay;J. M. Nester
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
Shengtai Li;L. Petzold
通讯作者:
L. Petzold
DOI:
--
发表时间:
2021
期刊:
IFAC Conference on Analysis and Design of Hybrid Systems
影响因子:
--
作者:
Yahao Chen;Stephan Trenn
通讯作者:
Stephan Trenn
影响因子:
6.8
作者:
M. A. Aguiar;E. Camponogara;B. Foss
通讯作者:
B. Foss