The Design, Fabrication, and Test of an Electrofluidic Servovalve
Abstract
This report covers the design, fabrication, and testing of a dual input (hydraulic and electric) servovalve using fluidic amplifiers and positive derivative feedback. The design utilized a two-stage gain block to drive a hydraulic actuator. Electrical input signals were converted by a torque motor into mechanical motion of the first-stage flow splitter. Actuator position was fed back to a movable splitter in the second-stage amplifier. Flow to the actuator was augmented in a positive feedback sense by a spool valve whose flow was proportional to actuator velocity. Performance tests showed that the servovalve accepted and summed combinations of pressure and electrical inputs. Frequency response objectives were met without the high leakage flow penalty usually associated with this application of fluid amplifiers. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1980
- Accession Number
- ADA082443
Entities
People
- Lester K. Pecan
- Maurice F. Funke