Digital switched hydraulics

Abstract

This paper reviews recent developments in digital switched hydraulics particularly the switched inertance hydraulic systems (SIHSs). The performance of SIHSs is presented in brief with a discussion of several possible configurations and control strategies. The soft switching technology and high-speed switching valve design techniques are discussed. Challenges and recommendations are given based on the current research achievements.

Keywords

digital hydraulics / switched inertance hydraulic systems / energy efficiency / high-speed switching valve / fluid-borne noise

References

[1] Scheidl R, Linjama M, Schmidt S. Is the future of fluid power digital? Proceedings of the Institution of Mechanical Engineers. Part I, Journal of Systems and Control Engineering, 2012, 226(6): 721–723

[2] Yang H Y, Pan M. Engineering research in fluid power: A review. Journal of Zhejiang University. Science A, 2015, 16(6): 427–442

[3] Linjama M, Laamanen A, Vilenius M. Is it time for digital hydraulics? In: Proceedings of the 8th Scandinavian International Conference on Fluid Power. Tampere, 2003, 347–366

[4] Linjama M. Digital fluid power: State of the art. In: Proceedings of The 12th Scandinavian International Conference on Fluid Power. Tampere, 2011, 18–20

[5] The Artemis Intelligent Power Ltd.Digital Displacement hydraulics. 2017. Retrieved from

[6] Digital Hydraulic LLC. Digital Hydraulic Transformer. 2017. Retrieved from

[7] Norrhydro Ltd. NorrDigi System Solution. 2017. Retrieved from

[8] Scheidl R, Kogler H, Winkler B. Hydraulic switching control-objectives, concepts, challenges and potential applications. Hidraulica, 2013, (1): 7–18

[9] Winkler B. Development of a fast low-cost switching valve for big flow rates. In: Proceedings of the 3rd FPNI-PhD Symposium on Fluid Power. Terrassa, 2004, 599–606

[10] Winkler B, Ploeckinger A,Scheidl R.A novel piloted fast switching multi poppet valve. International Journal of Fluid Power, 2010, 11(3): 7–14

[11] Kogler H, Scheidl R. Two basic concepts of hydraulic switching converters. In: Proceedings of the First Workshop on Digital Fluid Power. Tampere, 2008, 113–128

[12] Manhartsgruber B, Mikota G, Scheidl R. Modelling of a switching control hydraulic system. Mathematical and Computer Modelling of Dynamical Systems, 2005, 11(3): 329–344

[13] Scheidl R, Manhartsgruber B, Kogler H. Mixed time-frequency domain simulation of a hydraulic inductance pipe with a check valve. Proceedings of the Institution of Mechanical Engineers. Part C, Journal of Mechanical Engineering Science, 2011, 225(10): 2413–2421

[14] Kogler H, Scheidl R, Ehrentraut M, A compact hydraulic switching converter for robotic applications. In: Proceedings of Bath/ASME Symposium on Fluid Power and Motion Control. Bath: ASME, 2010, 55–68

[15] Scheidl R, Garstenauer M, Manhartsgruber B. Switching Type Control of Hydraulic Drives—A Promising Perspective for Advanced Actuation in Agricultural Machinery. SAE Technical Paper 2000-01-2559, 2000

[16] Kogler H. The hydraulic buck converter—Conceptual study and experiments. Dissertation for the Doctoral Degree. Linz: University Linz, 2012

[17] Kogler H, Scheidl R. Energy efficient linear drive axis using a hydraulic switching converter. Journal of Dynamic Systems, Measurement, and Control, 2016, 138(9): 091010

[18] Johnston N, Pan M, Kudzma S. An enhanced transmission line method for modelling laminar flow of liquid in pipelines. Proceedings of the Institution of Mechanical Engineers. Part I, Journal of Systems and Control Engineering, 2014, 228(4): 193–206

[19] Pan M, Johnston D, Plummer A, Theoretical and experimental studies of a switched inertance hydraulic system. Proceedings of the Institution of Mechanical Engineers. Part I, Journal of Systems and Control Engineering, 2014, 228(1): 12–25

[20] Pan M, Johnston D N, Plummer A R, Theoretical and experimental studies of a switched inertance hydraulic system including switching transition dynamics, non-linearity and leakage. Proceedings of the Institution of Mechanical Engineers. Part I, Journal of Systems and Control Engineering, 2014, 228(10): 802–815

[21] Pan M, Johnston N, Robertson J, Experimental investigation of a switched inertance hydraulic system with a high-speed rotary valve. Journal of Dynamic Systems, Measurement, and Control, 2015, 137(12): 121003

[22] Pan M. Adaptive control of a piezoelectric valve for fluid-borne noise reduction in a hydraulic buck converter. Journal of Dynamic Systems, Measurement, and Control, 2017, 139(8): 081007

[23] Sell N, Johnston D, Plummer A, A linear valve actuated switched inertance hydraulic system. In: Proceedings of the 14th Scandinavian International Conference on Fluid Power. 2015, 49430

[24] Pan M, Plummer A, El Agha A. Theoretical and experimental studies of a switched inertance hydraulic system in a four-port high speed switching valve configuration. Energies, 2017, 10(6): 780

[25] Pan M. A global optimisation of a switched inertance hydraulic system based on genetic algorithm. In: Proceedings of the 15th Scandinavian International Conference on Fluid Power. Linköping, 2017, 302 ‒308

[26] Brown F T. Switched reactance hydraulics: A new way to control fluid power. In: Proceedings of the National Conference on Fluid Power. Chicago, 1987, 25–34

[27] Johnston D N. A switched inertance device for efficient control of pressure and flow. In: Proceedings of Bath/ASME Fluid Power and Motion Control Symposium. New York: ASME, 2009, 1–8

[28] Wang F, Gu L, Chen Y. A continuously variable hydraulic pressure converter based on high-speed on-off valves. Mechatronics, 2011, 21(8): 1298–1308

[29] Wang P, Kudzma S, Johnston D N, The influence of wave effects on digital switching valve performance. In: Proceedings of the Fourth Workshop on Digital Fluid Power. Linz, 2011

[30] Van de Ven J D. On fluid compressibility in switch-mode hydraulic circuits—Part I: Modelling and analysis. Journal of Dynamic Systems, Measurement, and Control, 2012, 135(2): 021013

[31] Wiens T K. Analysis and mitigation of valve switching losses in switched inertance converters. In: Proceedings of ASME/Bath 2015 Symposium on Fluid Power and Motion Control. Chicago: ASME, 2015, V001T01A053

[32] Rannow M B, Tu H C, Li P Y, Software enabled variable displacement pumps—Experimental studies. In: Proceedings of the 2006 ASME-IMECE. Chicago: ASME, 2006, IMECE2006– 14973

[33] Tu H C, Rannow M B, Van de Ven J D, High speed rotary pulse width modulated on/off valve. In: Proceedings of the 2007 ASME-IMECE, Seattle, 2007, IMECE2007–42559

[34] Wiens T. Analysis and mitigation of valve switching losses in switched inertance converters. In: Proceedings of ASME/Bath 2015 Symposium on Fluid Power and Motion Control. Chicago: ASME, 2015, FPMC2015–9600

[35] Rannow M B,Li P Y.Soft switching approach to reducing transition losses in an on/off hydraulic valve. Journal of Dynamic Systems Measurement & Control, 2012, 134(6): 064501

[36] Yudell A C, Van de Ven J D. Soft switching in switched inertance hydraulic circuits. In: Proceedings of Bath/ASME 2016 Symposium on Fluid Power and Motion Control. Bath: ASME, 2016, V001T01A040

[37] Li P Y, Li C Y, Chase T R. Software enabled variable displacement pumps. In: Proceedings of ASME International Mechanical Engineering Congress and Exposition. Orlando: ASME, 2005, 12: 63–72

[38] Brown F T, Tentarelli S C, Ramachandran S. A hydraulic rotary switched inertance servo-transformer. Journal of Dynamic Systems, Measurement, and Control, 1988, 110(2): 144–150

[39] Liaw C J, Brown F T. Nonlinear dynamics of an electrohydraulic flapper nozzle valve. Journal of Dynamic Systems, Measurement, and Control, 1990, 112(2): 298–304

[40] Yokota S,Akutu K.A fast-acting electro-hydraulic digital transducer: A poppet-type on-off valve using a multilayered piezoelectric device. JSME International Journal. Series. 2, Fluids Engineering, Heat Transfer, Power, Combustion, Thermophysical Properties, 1991, 34(4): 489–495

[41] Cui P, Burton R T, Ukrainetz P R. Development of A High Speed On/Off Valve. SAE Technical Paper 911815, 1991

[42] Kajima T, Kawamura Y. Development of a high-speed solenoid valve: Investigation of solenoids. IEEE Transactions on Industrial Electronics, 1995, 42(1): 1–8

[43] Winkler B, Scheidl R. Optimization of a fast switching valve for big flow rates. In: Proceedings of Bath Workshop on Power Transmission and Motion Control. 2006, 387‒399

[44] Tu H, Rannow M B, Wang M, Modeling and validation of a high speed rotary PWM on/off valve. In: Proceedings of the ASME 2009 Dynamic Systems and Control Conference. Hollywood: ASME, 2009 ,629 ‒636

[45] Katz A A, Van de Ven J D. Design of a high-speed on-off valve. In: Proceedings of the ASME 2009 International Mechanical Engineering Congress and Exposition. Lake Buena Vista: ASME, 2009, 237 ‒246

[46] Sell N. Control of a fast switching valve for digital hydraulics. Dissertation for the Doctor Degree. Bath: University of Bath, 2015

[47] Sell N, Johnston D, Plummer A, Development of a position controlled digital hydraulic valve. In: Proceedings of the ASME/BATH 2015 Symposium on Fluid Power and Motion Control. Chicago: ASME, 2015, V001T01A008

RIGHTS & PERMISSIONS

Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature