Advanced Electrofluidic Servovalve Development.
Abstract
This report covers the advanced development of an electrofluidic servovalve. This device accepts and sums electrical and hydraulic inputs and provides an output capable of accurately positioning a hydraulic actuator. The design employs fluidic amplifiers with rotating movable flow splitters, an actuator piston feedback mechanism, and a unique positive derivative feedback circuit. The need for adequate actuator flow is met by use of a spool valve to augment the driving amplifier output. The positive derivative feedback circuit controls spool response, so that flow to the actuator is proportional to actuator velocity. Demonstration tests of the final design showed satisfactory performance of the rotary splitter concept, and an order-of-magnitude increase in servovalve frequency response through use of derivative feedback. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1981
- Accession Number
- ADA105172
Entities
People
- Lester K. Pecan