Download or read book Modelling and Control of an Annular Momentum Control Device written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-18 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a modelling and control study for an advanced momentum storage device supported on magnetic bearings are documented. The control challenge posed by this device lies in its dynamics being such a strong function of flywheel rotational speed. At high rotational speed, this can lead to open loop instabilities, resulting in requirements for minimum and maximum control bandwidths and gains for the stabilizing controllers. Using recently developed analysis tools for systems described by complex coefficient differential equations, the closed properties of the controllers were analyzed and stability properties established. Various feedback controllers are investigated and discussed. Both translational and angular dynamics compensators are developed, and measures of system stability and robustness to plant and operational speed variations are presented. Downer, James R. and Johnson, Bruce G. Unspecified Center ANGULAR MOMENTUM; CONTROL STABILITY; DYNAMIC CONTROL; MAGNETIC BEARINGS; SYSTEMS STABILITY; COMPENSATORS; CONTROL THEORY; FEEDBACK CONTROL; FLYWHEELS...