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In the modal balancing procedure suggested by Gasch and Drechsler [1] a simple identification method is used to find the generalized unbalances without test runs.
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The rotor is balanced at its first bending critical speed using modal balancing method in a single trial run and using a single balancing plane.
The method thus avoids multiple trial runs required for modal balancing of flexible rotors.
The theory presented is a unification and development of the modal balancing and influence coefficient techniques, and shows that flexible rotors can be balanced at low speed, so that no high speed balancing is needed when certain conditions are met.
The balancing procedure is the following.
During the balancing procedure, these values always need to be kept constant.
The energy balancing procedure leads to sequences presented on the third line of Figure 1.
This balancing procedure will be performed within each GP practice.
Using the proposed mode shape expansion and the input output balance procedures, along with the modal orthogonality relations, the mass and stiffness matrices of the system can be estimated.
In this paper a modal coupling procedure is developed to improve residual modal effects based on experimentally generated data.
In this context, a modal analysis procedure based on the adaptive filter RLS/QRD is described.
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