Challenges with Respect to Control of Digital Displacement Hydraulic Units

This paper investigates the many complications arising when controlling a digital displacement hydraulic machine with non-smooth dynamical behavior. The digital hydraulic machine has a modular construction with numerous independently controlled pressure chambers. For proper control of dynamical syst...

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Main Authors: Niels Henrik Pedersen, Per Johansen, Torben Ole Andersen
Format: Article
Language:English
Published: Norwegian Society of Automatic Control 2018-04-01
Series:Modeling, Identification and Control
Subjects:
Online Access:http://www.mic-journal.no/PDF/2018/MIC-2018-2-4.pdf
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spelling doaj-76c90fe0096745e5bff4d03a0126b4c52020-11-25T00:32:46ZengNorwegian Society of Automatic ControlModeling, Identification and Control0332-73531890-13282018-04-013929110510.4173/mic.2018.2.4Challenges with Respect to Control of Digital Displacement Hydraulic UnitsNiels Henrik PedersenPer JohansenTorben Ole AndersenThis paper investigates the many complications arising when controlling a digital displacement hydraulic machine with non-smooth dynamical behavior. The digital hydraulic machine has a modular construction with numerous independently controlled pressure chambers. For proper control of dynamical systems, a model representation of the systems fundamental dynamics is required for transient analysis and controller design. Since the input is binary (active or inactive) and it may only be updated discretely, the machine comprises both continuous and discrete dynamics and therefore belongs to the class of hybrid dynamical systems. The study shows that the dynamical system behavior and control complexity are greatly dependent on the configuration of the machine, the operation strategy, and in which application it is used. Although the system has non-smooth dynamics, the findings show that simple continuous and discrete approximations may be applicable for control development in certain situations, whereas more advanced hybrid control theory is necessary to cover a broader range of situations.http://www.mic-journal.no/PDF/2018/MIC-2018-2-4.pdfDigital Displacement UnitsFluid PowerControlNon-smooth SystemHybrid Systems
collection DOAJ
language English
format Article
sources DOAJ
author Niels Henrik Pedersen
Per Johansen
Torben Ole Andersen
spellingShingle Niels Henrik Pedersen
Per Johansen
Torben Ole Andersen
Challenges with Respect to Control of Digital Displacement Hydraulic Units
Modeling, Identification and Control
Digital Displacement Units
Fluid Power
Control
Non-smooth System
Hybrid Systems
author_facet Niels Henrik Pedersen
Per Johansen
Torben Ole Andersen
author_sort Niels Henrik Pedersen
title Challenges with Respect to Control of Digital Displacement Hydraulic Units
title_short Challenges with Respect to Control of Digital Displacement Hydraulic Units
title_full Challenges with Respect to Control of Digital Displacement Hydraulic Units
title_fullStr Challenges with Respect to Control of Digital Displacement Hydraulic Units
title_full_unstemmed Challenges with Respect to Control of Digital Displacement Hydraulic Units
title_sort challenges with respect to control of digital displacement hydraulic units
publisher Norwegian Society of Automatic Control
series Modeling, Identification and Control
issn 0332-7353
1890-1328
publishDate 2018-04-01
description This paper investigates the many complications arising when controlling a digital displacement hydraulic machine with non-smooth dynamical behavior. The digital hydraulic machine has a modular construction with numerous independently controlled pressure chambers. For proper control of dynamical systems, a model representation of the systems fundamental dynamics is required for transient analysis and controller design. Since the input is binary (active or inactive) and it may only be updated discretely, the machine comprises both continuous and discrete dynamics and therefore belongs to the class of hybrid dynamical systems. The study shows that the dynamical system behavior and control complexity are greatly dependent on the configuration of the machine, the operation strategy, and in which application it is used. Although the system has non-smooth dynamics, the findings show that simple continuous and discrete approximations may be applicable for control development in certain situations, whereas more advanced hybrid control theory is necessary to cover a broader range of situations.
topic Digital Displacement Units
Fluid Power
Control
Non-smooth System
Hybrid Systems
url http://www.mic-journal.no/PDF/2018/MIC-2018-2-4.pdf
work_keys_str_mv AT nielshenrikpedersen challengeswithrespecttocontrolofdigitaldisplacementhydraulicunits
AT perjohansen challengeswithrespecttocontrolofdigitaldisplacementhydraulicunits
AT torbenoleandersen challengeswithrespecttocontrolofdigitaldisplacementhydraulicunits
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