A measurement system for the diagnosis and maintenance of an electromechanical energy storage machine is described. The machine is a compact, low-weight homopolar generator, consisting of two concentric counter-rotating drum rotors, which store 2 MJ of kinetic energy. The rotors are mounted on air bearings, and operate continuously in the transient mode in the range of 3000-6000 rpm. The strong magnetic and electric fields present in the machine do not allow use of normal displacement transducers. Therefore, a fluidic sensor, coupled with an ultra-miniature solid-state pressure transducer is used to allow accurate measurements within a range of 2 mm and 0-200 Hz. A survey control system composed of ten fluidic transducers and two spin velocity transducers is described.
A Diagnosis and maintenance system for an electromechanical energy storage machine based on a new type of fluidic transducer
ANGRILLI, FRANCESCO;BASSO, ROBERTO;ROSSI, ALDO
1985
Abstract
A measurement system for the diagnosis and maintenance of an electromechanical energy storage machine is described. The machine is a compact, low-weight homopolar generator, consisting of two concentric counter-rotating drum rotors, which store 2 MJ of kinetic energy. The rotors are mounted on air bearings, and operate continuously in the transient mode in the range of 3000-6000 rpm. The strong magnetic and electric fields present in the machine do not allow use of normal displacement transducers. Therefore, a fluidic sensor, coupled with an ultra-miniature solid-state pressure transducer is used to allow accurate measurements within a range of 2 mm and 0-200 Hz. A survey control system composed of ten fluidic transducers and two spin velocity transducers is described.
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