An experimental method will be developed for measuring the dynamic stiffness and damping coefficients of magnetic bearings and controller systems. No method or facility currently exists for the experimental validation of these coefficients. These experimental results will be beneficial in validating current design models and for evaluating the applicability of various magnetic bearing systems to such machines as the SSME turbopumps, as well as multiple commercial applications. The steps required to achieve this objective include: selection of candidate rotordynamic coefficient extraction techniques for magnetic bearings and controller systems based on a review and evaluation of existing techniques for fluid film bearings and seals; selection of candidate magnetic bearing designs to be investigated based on suitability to space applications; and development of a coefficient extraction technique and definition of a test rig configuration necessary to implement the technique. A test procedure and facility for standardized testing of magnetic bearing systems will be developed. This will have the effect of providing independent verification of applicability of magnetic bearing systems in various applications. It will also provide information for the continued improvement of magnetic bearing system design.The resulting method will be useful to all magnetic bearing manufacturers and users who wish to improve the design of or evaluate competing magnetic bearing systems.bearings, magnetic, dynamic, measurement, stiffness, damping, coefficientsSTATUS: Phase I Only
