This paper studies a novel on/off-valve-based fine positioning method for hydraulic drives. The method proposed utilizes four on/off-valves in independent metering configuration to reach good positioning accuracy and low power losses. Previously, servo valves have been used in precise position control of hydraulic double acting cylinders. Another approach uses on/off-valves, which are typically driven by using pulse width modulation (PWM) or, if there are parallel connected valves, pulse code modulation (PCM). Typically, both cylinder sides are modulated simultaneously. The new concept proposed uses a cylinder model to calculate a correct opening sequence for the on/off-valves, such that the target piston position is reached. The method proposed modulates single cylinder side at a time in order to achieve small piston position step sizes. Despite relying on the modelled compressibility of the fluid, the method presented requires no knowledge about the bulk modulus of the fluid. It is enough that the bulk modulus of the fluid in both cylinder chambers can be assumed equal. The paper includes the design of the control method, a simulation study proving the validity of the method, and an experimental part investigating the performance in practice. The experimental results show a positioning accuracy of +/− 1 μm with an on/off-valve-based hydraulic drive, the maximum velocity of which is 0.7 m/s.
Skip Nav Destination
BATH/ASME 2018 Symposium on Fluid Power and Motion Control
September 12–14, 2018
Bath, UK
Conference Sponsors:
- Fluid Power Systems and Technology Division
ISBN:
978-0-7918-5196-8
PROCEEDINGS PAPER
Novel Fine Positioning Method for Hydraulic Drives Utilizing On/Off-Valves
Mikko Huova,
Mikko Huova
Tampere University of Technology, Tampere, Finland
Search for other works by this author on:
Matti Linjama,
Matti Linjama
Tampere University of Technology, Tampere, Finland
Search for other works by this author on:
Lauri Siivonen,
Lauri Siivonen
Tampere University of Technology, Tampere, Finland
Search for other works by this author on:
Till Deubel,
Till Deubel
Bosch Rexroth AG, Lohr am Main, Germany
Search for other works by this author on:
Heino Försterling,
Heino Försterling
Bosch Rexroth AG, Lohr am Main, Germany
Search for other works by this author on:
Edgar Stamm
Edgar Stamm
Bosch Rexroth AG, Lohr am Main, Germany
Search for other works by this author on:
Mikko Huova
Tampere University of Technology, Tampere, Finland
Matti Linjama
Tampere University of Technology, Tampere, Finland
Lauri Siivonen
Tampere University of Technology, Tampere, Finland
Till Deubel
Bosch Rexroth AG, Lohr am Main, Germany
Heino Försterling
Bosch Rexroth AG, Lohr am Main, Germany
Edgar Stamm
Bosch Rexroth AG, Lohr am Main, Germany
Paper No:
FPMC2018-8891, V001T01A046; 10 pages
Published Online:
November 20, 2018
Citation
Huova, M, Linjama, M, Siivonen, L, Deubel, T, Försterling, H, & Stamm, E. "Novel Fine Positioning Method for Hydraulic Drives Utilizing On/Off-Valves." Proceedings of the BATH/ASME 2018 Symposium on Fluid Power and Motion Control. BATH/ASME 2018 Symposium on Fluid Power and Motion Control. Bath, UK. September 12–14, 2018. V001T01A046. ASME. https://doi.org/10.1115/FPMC2018-8891
Download citation file:
47
Views
Related Proceedings Papers
Related Articles
Simulation and Experimentation of a Precise Nonlinear Tracking Control Algorithm for a Rotary Servo-Hydraulic System With Minimum Sensors
J. Dyn. Sys., Meas., Control (November,2013)
On Fluid Compressibility in Switch-Mode Hydraulic Circuits—Part I: Modeling and Analysis
J. Dyn. Sys., Meas., Control (March,2013)
Hydraulic Servo System With Mechanically Adjustable Compliance
J. Dyn. Sys., Meas., Control (March,2002)
Related Chapters
Later Single-Cylinder Engines
Air Engines: The History, Science, and Reality of the Perfect Engine
Servo System Position Control of Honing Machine Based on Fuzzy Control
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3
Alternative Systems
Turbo/Supercharger Compressors and Turbines for Aircraft Propulsion in WWII: Theory, History and Practice—Guidance from the Past for Modern Engineers and Students