Active vibration control of sudden mass imbalance in rotating machinery
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Jet Engines may experience severe vibration due to the sudden imbalance caused by blade failure. The current research investigates employment of piezoelectric actuators to suppress this form of transient using active vibration control. This requires identification of the source of the vibrations via an expert system, determination of the required phase angles and amplitudes for the correction forces, and application of the desired control signals to the piezo electric actuators. Correction forces may exceed the physical limitations of the actuators, hence results of `constrained force' quadratic programming, least squares and multi point correction algorithms will be compared. Use of the constrained force method is an original contribution to the field of active transient vibration control. This paper shows transient test results for sudden imbalance and compares the computational time requirements and balancing effectiveness for the various approaches. The paper also includes the architecture of the software system, and details of the control algorithms used for sudden imbalance correction.
author list (cited authors)
Manchala, D. W., Palazzolo, A. B., Kascak, A. F., Montague, G. T., & Brown, G. V.