Use of shape memory alloys in the robust control of smart structures. Final report, February 1990-June 1993

Technical Report · Sun Aug 01 00:00:00 EDT 1993

OSTI ID:5522560

Rao, V S; O'Keefe, T J; Koval, L R

This report details an integrated interdisciplinary approach for designing and implementing robust controllers on smart structures. The application of shape memory alloy materials as actuators and sensors in the active control of smart structures has been investigated. A process was developed for the electrodeposition of In-Tl alloys in a composition range where this system exhibits the shape memory effect. Cu-Zn, Au-Ca, and In-Cd alloy films were produced using the electrolytic techniques and their shape memory properties evaluated. To demonstrate some of the capabilities of smart structures and to determine the limitations imposed by hardware realizations, we have designed and fabricated experimental test articles incorporating flexible structures with SMA actuators, strain gauge sensors, signal processing circuits and digital controllers. Structural identification techniques have been employed in determining mathematical models of test articles from experimental data. A modified robust control design methodology was developed to accommodate the limited control force provided by the SMA actuators. The robustness properties of closed loop structural systems were verified experimentally. Adaptive control methods were implemented. Neural network based identification and control algorithms were developed. Smart structures, Shape memory alloys, Electrodeposition process, Robust control, Control using neural networks.

• Research Organization: Missouri Univ., Rolla, MO (United States)
• OSTI ID: 5522560
• Report Number(s): AD-A-270827/9/XAB; CNN: DAAL03-90-G-0053
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
ALLOYS
SHAPE MEMORY EFFECT
MAN-MACHINE SYSTEMS
DESIGN
FABRICATION
ACTUATORS
ALGORITHMS
AUTOMATION
CADMIUM ALLOYS
CALCIUM ALLOYS
CONTROL SYSTEMS
COPPER ALLOYS
DIGITAL SYSTEMS
ELECTRODEPOSITION
GOLD ALLOYS
INDIUM ALLOYS
MATHEMATICAL MODELS
NEURAL NETWORKS
STRAIN GAGES
THALLIUM ALLOYS
ZINC ALLOYS
DEPOSITION
ELECTROLYSIS
LYSIS
MATHEMATICAL LOGIC
MEASURING INSTRUMENTS
SURFACE COATING
360103* - Metals & Alloys- Mechanical Properties
420200 - Engineering- Facilities
Equipment
& Techniques