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Record Details

Record 21 of 6225
Electromechanical simulation and testing of actively controlled rotordynamic systems with piezoelectric actuators
Author and Affiliation:
Lin, Reng R.(NASA Lewis Research Center, Cleveland, OH, United States)
Palazzolo, A. B.(Texas A & M University, College Station, United States)
Kascak, A. F.(U.S. Army, NASA, Lewis Research Center)
Montague, G. T.(Sverdrup Technology, Inc., NASA, Lewis Research Center)
Abstract: Theoretical developments for the simulation of an actively controlled rotorbearing system with piezoelectric type actuators are summarized. Two simulation models were derived; the first assumes that the actuators and other electrical components in the feedback system operate at all frequencies without phase lag or rolloff, while the second model includes the nonideal behavior of these components which are modeled with linear electric circuits. The two models predict identical unbalance response at low frequencies, and the nonideal model also predicts instability-onset feedback gains. The agreement between the measured and predicted results for unbalance response and instability onset gain is very good. The predicted instability-onset feedback gain for active damping was found to be very sensitive to the tare (uncontrolled) damping in the unstable mode.
Publication Date: Jan 01, 1991
Document ID:
19920056634
(Acquired Nov 22, 1995)
Accession Number: 92A39258
Subject Category: MECHANICAL ENGINEERING
Document Type: Conference Paper
Publication Information: (SEE A92-39251)
Publisher Information: United States
Meeting Information: Joint U.S./Japan Conference on Adaptive Structures; 1st; Nov. 13-15, 1990; Maui, HI; United States
Financial Sponsor: NASA; United States
Organization Source: NASA Lewis Research Center; Cleveland, OH, United States
Description: 21p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACTIVE CONTROL; ELECTROMECHANICAL DEVICES; PIEZOELECTRIC CERAMICS; ROTOR DYNAMICS; VIBRATION DAMPING; ROTOR BODY INTERACTIONS; STRUCTURAL VIBRATION; VIBRATION MEASUREMENT
Imprint And Other Notes: IN: Joint U.S./Japan Conference on Adaptive Structures, 1st, Maui, HI, Nov. 13-15, 1990, Proceedings (A92-39251 16-39). Lancaster, PA, Technomic Publishing Co., Inc., 1991, p. 176-196. Research supported by Texas A & M Turbomachinery Consortium and U.S. Army.
Availability Source: Other Sources
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