A STUDY OF THE LOAD-FLOW CHARACTERISTICS OF AN ACCELERATION SWITCHING VALVE DRIVING A RESONANT LOAD,
Abstract
A resonant loaded acceleration switching servo is examined both theoretically and experimentally to explain why the actuator amplitude at resonance is decreased as a function of the spool switching frequency. An explanation for this behavior is found in the inherent flow characteristics of the acceleration switching valve. The valve spool-load-flow characteristics follows the theoretical sharp edge orifice relationship (non-load compensated) for DC spool magnitude greater than the spool amplitude at switching frequency. For amplitudes less than that switching frequency, the DC flow characteristic is modified by a reverse flow characteristic due to switching motion. Since there is also a large pressure drop across the load at resonance, the flow to the actuator is reduced accordingly at resonance which in effect provides synthetic damping to the system. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1959
- Accession Number
- AD0654364
Entities
People
- W. H. Wright
Organizations
- Johns Hopkins University Applied Physics Laboratory