In the design and optimization of artifacts requiring both mechanical and control design, the process is typically divided and performed in separate steps. The physical structure is designed first, a control strategy is selected, and the actual controller is then designed. This article examines how this separation could affect the overall system design and how the combination of the separate problems into a single decision model could improve the overall design, using an electric DC motor as a case study. The combination is challenging since the two problems often have different design criteria, decision objectives, and mathematical model properties. Furthermore, the two problems are often fully coupled in that the physical structure depends on the controller and the controller depends on the physical structure. A Pareto analysis is suggested as a rigorous way to compare a variety of design scenaria.

Issue Section:
Technical Papers
Keywords:
Combined Design and Control, Optimization, Electric DC Motor, electric motors, DC motors, optimal control, design engineering, control engineering, controllers, power control, torque control
Topics:
Design, Engines, Motors, Optimization, Control equipment
1.
Bendsøe
,
M. P.
,
Olhoff
,
N.
, and
Taylor
,
J. E.
,
1987
, “
On the Design of Structure and Controls for Optimal Performance of Actively Controlled Flexible Structures
,”
Mech. Struct. Mach.
,
15
(
3
), pp.
265
–
295
.
2.
Hale
,
A. L.
,
Lisowski
,
R. J.
, and
Dahl
,
W. E.
,
1985
, “
Optimal Simultaneous Structural and Control Design of Maneuvering Flexible Spacecraft
,”
Journal of Guidance, Control, and Dynamics
,
8-1
, pp.
86
–
93
.
3.
Isermann
,
R.
,
1996
, “
Modeling and Design Methodology for Mechatronic Systems
,”
IEEE/ASME Trans. Mechatron.
,
1
(
1
), pp.
16
–
28
.
4.
Skelton, R. E., 1985, “On the Structure of Modeling Errors and Inseparability of the Modeling and Control Problems,” IFAC Model Error Concepts & Compensations, New York, John Wiley & Sons.
5.
Youcef-Toumi
,
K.
,
1996
, “
Modeling, Design and Control Integration: A Necessary Step in Mechatronics
,”
IEEE/ASME Trans. Mechatron.
,
1
(
1
), pp.
29
–
38
.
6.
Brusher
,
G. A.
,
Kabamba
,
P. T.
, and
Ulsoy
,
A. G.
,
1997
, “
Coupling Between the Modeling and Controller Design Problems, Part II: Design
,”
ASME J. Dyn. Syst., Meas., Control
,
119
, pp.
278
–
283
.
7.
Hamdi, E. S., 1994, Design of Small Electrical Machines, New York, John Wiley & Sons.
8.
Khot, N. S., and Abhyankar, N. S., 1993, “Integrated Optimum Structural and Control Design,” in Structural Optimization: Status and Promise, 150, Progress in Astronautics and Aeronautics (M. P. Kamat, Ed.), Washington, D.C.: American Institute of Aeronautics and Astronautics, pp. 743–767.
9.
Park
,
J.-H.
, and
Asada
,
H.
,
1994
, “
Concurrent Design Optimization of Mechanical Structure and Control for High Speed Robots
,”
ASME J. Dyn. Syst., Meas., Control
,
116
, pp.
344
–
356
.
10.
Reyer, J. A., and Papalambros, P. Y., 2000, “An Investigation into Modeling and Solution Strategies for Optimal Design and Control,” ASME Design Engineering Technical Conferences, Paper DAC-14253, Las Vegas, Nevada, September 10–13.
11.
Reyer, J. A., Fathy, H., Papalambros, P. Y., and Ulsoy, A. G., 2001, “Comparison of Combined Embodiment Design and Control Optimization Strategies using Optimality Conditions,” ASME Design Engineering Technical Conferences, Paper DAC-21119, Pittsburgh, Pennsylvania, September 9–12.
Copyright © 2002
 by ASME
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