Electromechanical simulation and testing of actively controlled rotordynamic systems with piezoelectric actuators

Journal Article · Wed Mar 31 23:00:00 EST 1993 · Journal of Engineering for Gas Turbines and Power; (United States)

DOI:https://doi.org/10.1115/1.2906712· OSTI ID:6348525

Lin, Reng Rong; Palazzolo, A B ^[1]; Kascak, A F; Montague, G T ^[2]

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1. Texas A and M Univ., College Station (United States)
2. NASA, Cleveland, OH (United States)

Past research on this subject has treated piezoelectric actuators as ideal devices that have tip displacements proportional to their input voltages, at any instant in time. This assumption neglected phase lag and amplitude change at high frequencies. This characteristic of any actuator may lead to coupled control system-structural system instability that limits the amount of active stiffness or active damping that can be obtained. The paper presents a method for simulating the coupled electromechanical system to predict rotordynamic stability and unbalance response along with control system stability. The piezoelectric actuators and their amplifiers are represented as equivalent linear electrical circuits. The electromechanical system modeling approach is utilized to correlate test results from a double overhung rotor rig at NASA Lewis. The test results also show the effectiveness of the control system for suppressing the unbalance response of two modes using active stiffness and active damping.

• OSTI ID: 6348525
• Journal Information: Journal of Engineering for Gas Turbines and Power; (United States), Journal Name: Journal of Engineering for Gas Turbines and Power; (United States) Vol. 115:2; ISSN JETPEZ; ISSN 0742-4795
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
CONTROL SYSTEMS
ELECTRICITY
ENGINES
EQUIPMENT
FUNCTIONAL MODELS
GAS TURBINE ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINERY
MATERIALS TESTING
MECHANICAL TESTS
ON-LINE CONTROL SYSTEMS
ON-LINE SYSTEMS
OPTIMIZATION
PERFORMANCE
PIEZOELECTRICITY
SIMULATION
STABILITY
SYSTEMS ANALYSIS
TESTING
TURBOMACHINERY