Analysis by Simulation of Different Control Algorithms of A Digital Hydraulic Two-Actuator System
DOI:
https://doi.org/10.1080/14399776.2014.893710Keywords:
digital hydraulic valve, Digital Hydraulic Power Management System, efficiencyAbstract
Many hydraulic systems have losses, which could be avoided with new technology. Because component efficiency can be optimized to a certain operation point, hydraulic machines are no worse than other machines. More important than the peak efficiency values of each individual component in a system is the efficiency of the whole power transfer line. In a system where the amount of required power and the velocity/force ratio are variables, components may but seldom operate at their optimal design points. A typical approach to mobile work hydraulics is to use a load-sensing pump for a hydraulic multi-actuator system. This approach is efficient but seldom, if many actuators are used simultaneously. Our recent prototype of an improved hydraulic power supply system is the Digital Hydraulic Power Management System (DHPMS), which can serve many actuators at optimised supply pressure but is also capable of motoring and transforming. This functionality holistically reduces losses in the system. Losses can be further reduced by using distributed valve systems with sophisticated control algorithms together with the DHPMS. In this study, we used digital hydraulic valves, which efficiency strongly depends on the control algorithms used. We studied here different control methods for a system with two actuators, a DHPMS, and digital valves.
Downloads
References
Bishop Elton Digital Hydraulic Transformer - Approaching
Theorethical Perfection in Hydraulic Drive Efficiency [Conference]
// CD-ROM Proceedings of the 11th Scandinavian
International Conference on fluid power, SICFP’09. -
Linköping, Sweden: [s.n.], 2009.
Borghi M. [et al.] Energy Consumption of the Hydraulic
Circuit of a Mid-Size Power Tractor [Conference] //
Proceedings of the 7th International Fluid Power Conference.
- Aachen, Germany: [s.n.], 2010.
Erkkilä Mikko, Lehto Erkki and Virvalo Tapio New Energy
Efficient Valve Concept [Conference] // CR-ROM Proceedings
The 11th Scandinavian International Conference on
Fluid Power, SICFP’09. - Linköping, Sweden: [s.n.], 2009.
Heikkilä Mikko [et al.] Experimental Evaluation of a Digital
Hydraulic Power Mangement System [Conference] // The
Third Workshop on Digital Fluid Power, DFP’10. -
Tampere, Finland: [s.n.], 2010.
Heikkilä Mikko [et al.] Experimental Evaluation of a Piston-
Type Digital Pump-Motor-Transformer with Two Independed
Outlets [Conference] // Bath/ASME Symposioum on
Fluid Power and Motion Control. - Bath, UK: [s.n.], 2010.
Huova Mikko [et al.] Energy efficient control of multiactuator
digital hydraulic mobile machine [Conference] // Proceedings
of the 7th International Fluid Power Conference. -
Aachen, Germany: [s.n.], 2010.
Huova Mikko and Linjama Matti Energy efficient digital
hydraulic valve control utilizing pressurized tank line [Conference]
// The eight international fluid power conference. -
Aachen, Germany: [s.n.], 2012. - Vol. 2. - pp. 111–122.
Karvonen Matti [et al.] Simulation Study - Improving Efficiency
in Mobile Boom by Using Digital Hydraulic Power
Management System [Conference] // Proceedings of the
The Twelfth Scandinavian International Conference on
Fluid Power. - Tampere, Finland: [s.n.], 2011.
Linjama Matti [et al.] Desing and Implementation of Energy Saving
Digital Hydraulic Control System [Conference] // Proceedings
of the Tenth Scandinavian International Conference
on Fluid Power, SICFP’07. - Tampere, Finland: [s.n.], 2007.
Linjama Matti [et al.] Secondary Controlled Multi-Chamber
Hydraulic Cylinder [Conference] // CD-ROM Proceedings
of The 11th Scandinavian International Conference on
Fluid Power, SICFP’09. - Linköping, Sweden: [s.n.], 2009.
Linjama Matti and Huhtala Kalevi Digital Pump-Motor with
Independend Outlets [Conference] // CD-ROM Proceedings
of the 11th Scandinavian Conference on Fluid Power,
SICFP’09. - Linköping, Sweden: [s.n.], 2009.
Linjama Matti and Tammisto Jyrki New alternative for digital
pump-motor-transformer [Conference] // The Third Workshop
on Digital Fluid Power. - Linz, Austria: [s.n.], 2009.
Linjama Matti and Virvalo Tapio Low-Order Robust Controller
for Flexible Hydraulic Manipulators [Conference] // Power
Transmission and Motion Control 2005: Conference
Proceedings. - Bath, UK: [s.n.], 2005. - ISBN: 978-0-470-
-0.
