Environmental and economic factors have driven the advancements in fluid power technologies over the last two decades. Gradual development has been made over time on the state-of-the-art fluid power technology; however, there has been no major advancement leading to radical improvement on systems’ efficiencies. Displacement-controlled (DC) actuation has been under investigation by the authors’ group since its conception in 1998 as a highly efficient alternative to its valve controlled counterpart, demonstrating fuel economy improvements of up to 40% and the possibility for engine downsizing of up to 50% for an excavator truck-loading cycle. Through the installation of a variable displacement hydraulic pump/motor per actuator, DC actuation entirely eliminates the losses due to resistive control and allows for the recuperation of energy from overriding loads. The one-pump-per-actuator requirement however represents the technology’s largest obstacle due to the increased machine production costs. For this reason the authors’ group proposed the idea of pump switching wherein a reduced number of hydraulic units is connected to the actuators in a multi-actuator machine through a distributing manifold. The idea relies on proper design of the distributing manifold and enabling controls to realize machine operability. Work by the authors’ group has demonstrated that the pump-switching idea is feasible on the actuator level, achieving seaming-less switching transitions while retaining the basic fuel savings demonstrated for DC actuation. This paper presents the first formal attempt to create a supervisory controller for a DC multi-actuator machine with pump switching. The controller is based on priority levels geared towards the maximization of the number of available actuator combinations. Implementation on a DC hydraulic hybrid excavator prototype show the feasibility of the control approach as well as the limitations and further improvements.
Skip Nav Destination
ASME/BATH 2015 Symposium on Fluid Power and Motion Control
October 12–14, 2015
Chicago, Illinois, USA
Conference Sponsors:
- Fluid Power Systems and Technology Division
ISBN:
978-0-7918-5723-6
PROCEEDINGS PAPER
Priority-Based Supervisory Controller for a Displacement-Controlled Excavator With Pump Switching Available to Purchase
Enrique Busquets,
Enrique Busquets
Purdue University, West Lafayette, IN
Search for other works by this author on:
Monika Ivantysynova
Monika Ivantysynova
Purdue University, West Lafayette, IN
Search for other works by this author on:
Enrique Busquets
Purdue University, West Lafayette, IN
Monika Ivantysynova
Purdue University, West Lafayette, IN
Paper No:
FPMC2015-9521, V001T01A014; 10 pages
Published Online:
January 11, 2016
Citation
Busquets, E, & Ivantysynova, M. "Priority-Based Supervisory Controller for a Displacement-Controlled Excavator With Pump Switching." Proceedings of the ASME/BATH 2015 Symposium on Fluid Power and Motion Control. ASME/BATH 2015 Symposium on Fluid Power and Motion Control. Chicago, Illinois, USA. October 12–14, 2015. V001T01A014. ASME. https://doi.org/10.1115/FPMC2015-9521
Download citation file:
38
Views
Related Proceedings Papers
Related Articles
Optimal Power Management of Hydraulic Hybrid Mobile Machines—Part II: Machine Implementation and Measurements
J. Dyn. Sys., Meas., Control (May,2016)
Development of a Fuel-Injection Spark-Ignition Oil Engine
Trans. ASME (January,1937)
Monopropellant-Driven Free Piston Hydraulic Pump for Mobile Robotic Systems
J. Dyn. Sys., Meas., Control (March,2004)
Related Chapters
Dismantling
Decommissioning Handbook
Station Automation
Pipeline System Automation and Control
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential