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Dynamics and Dynamical Systems Commons™
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Full-Text Articles in Dynamics and Dynamical Systems
Comparison Of Digital Controllers Used In Magnetic Suspension And Balance Systems, William Allen Kilgore
Comparison Of Digital Controllers Used In Magnetic Suspension And Balance Systems, William Allen Kilgore
Mechanical & Aerospace Engineering Theses & Dissertations
Dynamic systems that were once controlled by analog circuits are now controlled by digital computers. Presented is a comparison of the digital controllers presently used with magnetic suspension and balance systems. The overall response of the systems are compared using a computer simulation of the magnetic suspension and balance system and the digital controllers. The comparisons include responses to both simulated force and position inputs. A preferred digital controller is determined from the simulated responses.
Expert Systems For Automated Maintenance Of A Mars Oxygen Production System, Ming-Tsang Ho
Expert Systems For Automated Maintenance Of A Mars Oxygen Production System, Ming-Tsang Ho
Mechanical & Aerospace Engineering Theses & Dissertations
A prototype expert system has been developed for maintaining autonomous operation of a Mars oxygen production system. Normal operation conditions and failure modes according to certain desired criteria are tested and identified. Several schemes for failure detection and isolation using forward chaining, backward chaining, knowledge-based and rule-based are devised to perform several housekeeping functions. These functions include self-health checkout, an emergency shut down program, fault detection and conventional control activities. An effort has been made to derive the dynamic model of the system using Bond-Graph technique in order to develop the model-based failure detection and isolation scheme by estimation method. …