| 摘要 |
<p>A method and apparatus is provided for diagnosing and correcting rotating stall and surge in rotating machines (20) by monitoring dynamic shaft precession as the machine approaches a destabilizing condition when indicated by the comparison step. Axial vibration monitoring means (26) is also provided for monitoring and comparing a dynamic axial vibration of the machine with a standard and altering the axial vibration as the machine approaches a destabilizing condition. Furthermore, the instant invention measures the complex dynamic stiffness of the machine and computes the direct dynamic stiffness and the quadrature dynamic stiffness for use as a destabilizing warning device by monitoring for a drop in direct dynamic stiffness and the quadrature dynamic stiffness components. One embodiment for altering the rotating stall and/or surge is by a controlled active servobearing (40).</p> |
