Hydraulic Signal-Processing Amplifier Performance in Position Control Systems.
Abstract
Summing and proportional gain amplifiers for use in hydraulic closed-loop position control systems have been developed and their static and dynamic characteristics measured. Amplifiers constructed using a laminar flow laminate design with 0.5 mm nozzle width and an aspect ratio of 2.0 exhibited frequency responses with less than 3 dB decay and 90 deg phase shift at 300 Hz when operated at 110 kPa supply pressure. A closed-loop position control system for a load mass has been developed and tested using the summing and proportional gain amplifier, a position-to-fluid pressure feedback transducer, a hydraulic actuator, and a two-stage commercial servovalve modified to accept fluid inputs. Tests performed on the servosystem demonstrated a response to position step command, with no overshoot, in 38 ms. Analysis and test data show that the primary element limiting dynamic response is the fluidic input servovalve.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1977
- Accession Number
- ADA053030
Entities
People
- David Lee
- David N. Wormley
Organizations
- Massachusetts Institute of Technology