Target Management in Complex System Design Using System Norms

[+] Author and Article Information
H. Mahmoud1

 University of Michigan, Ann Arbor, MI 48109-2125ham@umich.edu

P. Kabamba, A. G. Ulsoy

 University of Michigan, Ann Arbor, MI 48109-2125

G. Brusher

Ford Motor Company


Corresponding author.

J. Mech. Des 127(4), 536-544 (Aug 23, 2004) (9 pages) doi:10.1115/1.1897404 History: Received February 03, 2004; Revised August 23, 2004

The problem of setting, balancing, and determining priorities of design targets among the subsystems constituting an engineering system, i.e., managing the targets, is addressed. A new norm-based benchmarking approach is proposed to relate the system-level design objectives to subsystem design targets. The proposed approach provides a systematic means of setting and balancing subsystem design targets to deliver the desired system performance and ranks the priorities of the subsystem targets. Furthermore, the use of system norms, rather than output signal norms, to quantify system and subsystem performance reduces the number of design targets in multi-input multi-output (MIMO) systems. The approach is illustrated on a vehicle example, consisting of a frame, body, and body mounts as the subsystems.

Copyright © 2005 by American Society of Mechanical Engineers
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Figure 1

Multidisciplinary design problem

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Figure 2

Model of simple physical system after decomposition

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Figure 3

System with feedback loops

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Figure 4

System-level response and its sensitivity with respect to α

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Figure 5

Models of vehicle subsystems

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Figure 6

Series connection

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Figure 7

Parallel connection

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Figure 8

Feedback connection




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