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Design of robust adaptive unbalance response controllers for rotors with magnetic bearings
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Knospe, Carl R. Tamer, Samir M. Fedigan, Stephen J. |
| Copyright Year | 1996 |
| Description | Experimental results have recently demonstrated that an adaptive open loop control strategy can be highly effective in the suppression of unbalance induced vibration on rotors supported in active magnetic bearings. This algorithm, however, relies upon a predetermined gain matrix. Typically, this matrix is determined by an optimal control formulation resulting in the choice of the pseudo-inverse of the nominal influence coefficient matrix as the gain matrix. This solution may result in problems with stability and performance robustness since the estimated influence coefficient matrix is not equal to the actual influence coefficient matrix. Recently, analysis tools have been developed to examine the robustness of this control algorithm with respect to structured uncertainty. Herein, these tools are extended to produce a design procedure for determining the adaptive law's gain matrix. The resulting control algorithm has a guaranteed convergence rate and steady state performance in spite of the uncertainty in the rotor system. Several examples are presented which demonstrate the effectiveness of this approach and its advantages over the standard optimal control formulation. |
| File Size | 583443 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19960052915 |
| Archival Resource Key | ark:/13960/t7hq8w36n |
| Language | English |
| Publisher Date | 1996-07-01 |
| Access Restriction | Open |
| Subject Keyword | Cybernetics Robustness Mathematics Algorithms Forced Vibration Optimal Control Control Theory Magnetic Bearings Adaptive Control Matrices Mathematics Rotating Shafts Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
