0
research-article

On Decentralized Optimization for a Class of Multi-subsystem Co-design Problems

[+] Author and Article Information
Tianchen Liu

Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742
tianchen@umd.edu

Shapour Azarm

Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742
azarm@umd.edu

Nikhil Chopra

Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742
nchopra@umd.edu

1Corresponding author.

ASME doi:10.1115/1.4037893 History: Received June 01, 2016; Revised September 01, 2017

Abstract

Co-design refers to the process of integrating the optimization of the physical plant design and control of a system. In this paper, a new class of co-design problems with a multisubsystem architecture in both design and control is formulated and solved. Our work here extends earlier research on models and solution approaches from single-system to multisubsystem co-design. In this class, the optimization model for the physical design part in each subsystem is assumed to have a convex objective function with convex inequality and linear equality constraints. The optimization model for the control part of each subsystem belongs to a class of finite time-horizon Linear Quadratic Regulator (LQR) feedback control. A new multi-level decentralized method is proposed that can obtain optimal or near-optimal solutions for this class of co-design problems. Details of the model and approach are presented and demonstrated by a numerical as well as a more complex spring-mass-damper system example. The proposed decentralized approach has been compared with a centralized approach. Using a scalable test problem, it is shown that as the size of the problem is increased, the computation effort for the decentralized approach increases linearly while that of the centralized approach increases nonlinearly.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In