Model-based identification of unbalance and anguar msalgnment in a rotor system

A model-based monitoring technique for rotor systems is in development, which allows a high-detailed fault prediction including exact location and dimension. In a first step, the fundamentals of the concept - the simulation environment and identification of the faults - are validated and verified using an experimental test system. A rotor test rig to replicate and investigate several damages is developed, whereas the main attention in this paper is turned on unbalance and angular misalignment. The implemented test system is modeled using the simulation environment called MBSim (http://mbsim.berlios.de) which is under public license. This simulation environment, developed at the Institute of Applied Mechanics, is based on a framework for the efficient simulation of multi-body-systems with unilateral contacts and elastic elements. Therewith typical defects in rotating machinery like unbalance and angular misalignment can be replicated. The experimental results and the simulation allow the exact identification of the regarded damage. Both, unbalance and angular misalignment can be detected whereas not only the kind of the damage, but also the dimension of the damage can be identified.