Open-Loop Characterisation of Soft Actuator Pressure Regulated by Pulse-Driven Solenoid Valve

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Publicado en:Robotics vol. 14, no. 12 (2025), p. 177-199
Autor principal: Serrano-Balbontín, Andrés J
Otros Autores: Tejado Inés, Vinagre, Blas M, Aphale, Sumeet S, San-Millan, Andres
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MDPI AG
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Acceso en línea:Citation/Abstract
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022 |a 2218-6581 
024 7 |a 10.3390/robotics14120177  |2 doi 
035 |a 3286351787 
045 2 |b d20250101  |b d20251231 
084 |a 231629  |2 nlm 
100 1 |a Serrano-Balbontín, Andrés J  |u Departamento de Ingeniería Eléctrica, Electrónica y Automática, Escuela de Ingenierías Industriales, Universidad de Extremadura, 06006 Badajoz, Spain; bvinagre@unex.es 
245 1 |a Open-Loop Characterisation of Soft Actuator Pressure Regulated by Pulse-Driven Solenoid Valve 
260 |b MDPI AG  |c 2025 
513 |a Journal Article 
520 3 |a Solenoid valves are widely used for pressure regulation in soft pneumatic robots, but their inherent electromechanical nonlinearities—such as dead zones, saturation, and pressure-dependent dynamics—pose significant challenges for accurate control. Conventional pulse modulation techniques, including pulse-width modulation (PWM), often exacerbate these effects by neglecting valve-switching transients. This paper presents a physics-informed dynamic modelling framework that captures transient and pressure-dependent behaviours in solenoid valve-driven soft pneumatic systems operating under pulse modulation. The model is experimentally validated on a soft pneumatic actuator (SPA) platform using four modulation schemes: PWM, integral pulse frequency modulation (IPFM), its inverted variant (IIPFM), and <inline-formula>Δ</inline-formula><inline-formula>Σ</inline-formula> modulation. Results demonstrate that only the IIPFM scheme produces near-linear input–pressure characteristics, in close agreement with model predictions. The proposed framework provides new physical insights into valve-induced nonlinearities and establishes a systematic basis for high-fidelity modelling and control of soft pneumatic robotic systems. 
653 |a Control algorithms 
653 |a Experiments 
653 |a Solenoid valves 
653 |a Valves 
653 |a Sensors 
653 |a Controllers 
653 |a Resorts & spas 
653 |a Pulse modulation 
653 |a Pneumatics 
653 |a Dynamic models 
653 |a Pressure dependence 
653 |a Actuators 
653 |a Pulse duration modulation 
653 |a Robotics 
653 |a Nonlinearity 
653 |a Pulse frequency modulation 
700 1 |a Tejado Inés  |u Departamento de Ingeniería Eléctrica, Electrónica y Automática, Escuela de Ingenierías Industriales, Universidad de Extremadura, 06006 Badajoz, Spain; bvinagre@unex.es 
700 1 |a Vinagre, Blas M  |u Departamento de Ingeniería Eléctrica, Electrónica y Automática, Escuela de Ingenierías Industriales, Universidad de Extremadura, 06006 Badajoz, Spain; bvinagre@unex.es 
700 1 |a Aphale, Sumeet S  |u Artificial Intelligence, Robotics and Mechatronic Systems Group (ARMS), School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK; s.aphale@abdn.ac.uk (S.S.A.); andres.san-millanrodriguez@abdn.ac.uk (A.S.-M.) 
700 1 |a San-Millan, Andres  |u Artificial Intelligence, Robotics and Mechatronic Systems Group (ARMS), School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK; s.aphale@abdn.ac.uk (S.S.A.); andres.san-millanrodriguez@abdn.ac.uk (A.S.-M.) 
773 0 |t Robotics  |g vol. 14, no. 12 (2025), p. 177-199 
786 0 |d ProQuest  |t Advanced Technologies & Aerospace Database 
856 4 1 |3 Citation/Abstract  |u https://www.proquest.com/docview/3286351787/abstract/embedded/Q8Z64E4HU3OH5N8U?source=fedsrch 
856 4 0 |3 Full Text + Graphics  |u https://www.proquest.com/docview/3286351787/fulltextwithgraphics/embedded/Q8Z64E4HU3OH5N8U?source=fedsrch 
856 4 0 |3 Full Text - PDF  |u https://www.proquest.com/docview/3286351787/fulltextPDF/embedded/Q8Z64E4HU3OH5N8U?source=fedsrch