Dynamic analysis of pneumatic actuators

Sorli, Massimo; Gastaldi, Laura; Codina, Esteban; Heras, Salvador De Las

doi:10.1016/s0928-4869(99)00012-9

Cited by 33 publications

(20 citation statements)

References 5 publications

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“…[18] in 1956, other authors have tried to investigate the matter [21] and others have taken advantage of these studies [14] by extending the conclusions in the relevant analytical models. Other researchers [1] have made up for the mentioned difficulty by using polytropic equations. However, a possible practical truth seems to be related to the fact that the heat transfer lies somewhere between adiabatic and isothermal.…”

Section: The Theoretical Model and Its Experimental Identificationmentioning

confidence: 99%

“…Basing the definitions as Ref. [1] the position of the problem this paper is dealing with, will be that of a positioner. In the mentioned frame, a model, which aims at simulating the dynamic behaviour of a pneumatic actuator, controlled by on-off valves (here also termed as digital valves) whose operating conditions are established by a pulse width modulation (PWM) scheme, must be clearly considered a respectable challenge.…”

Section: Introductionmentioning

confidence: 99%

“…The importance of analytically modelling the system is also recognised by several authors (see for example Refs. [1,[12][13][14][15]). In particular, an analytical model in the frame of the mentioned applications (i.e.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimenting and modelling the dynamics of pneumatic actuators controlled by the pulse width modulation (PWM) technique

Messina¹,

Giannoccaro²,

Gentile³

2005

Mechatronics

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Section: The Theoretical Model and Its Experimental Identificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimenting and modelling the dynamics of pneumatic actuators controlled by the pulse width modulation (PWM) technique

Messina¹,

Giannoccaro²,

Gentile³

2005

Mechatronics

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“…Basic models of pneumatic actuators chambers assume that the gas process in compression and expansion is polytrophic (Andersen, 1967 andSorli et al, 1999). A common practice is to assume that the processes involved are isothermal, adiabatic or in general polytrophic.…”

Section: Fig 1: Pneumatic Meter-out Circuit For Speed Controlmentioning

confidence: 99%

Improving Gas Dynamic Models for Pneumatic Systems

Heras¹

2003

International Journal of Fluid Power

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The present paper deals with the improvement to modelling of pneumatic systems. The thermal air process inside the pneumatic chambers is modelled without using the polytrophic exponent to relate the pressure-density relationship. The model takes into account the real gases behaviour and the thermal constant time for estimating heat transfer. The polytrophic exponent is used only for adjusting the data and to improve the understanding of the system. The validity of this method is demonstrated by experiments.

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“…Meanwhile pneumatic muscles have been widely used because of its simple assembly [18] and are mainly controlled by tracking control methods [19][20][21]. Several studies have performed on pneumatic muscles, mainly focusing on the modeling and control of pneumatic valves [22][23][24]. The precise pressure proportional valve is typically used to achieve output accuracy, but the cost is expensive and the flow rate of the pressure proportional valve is relatively small.…”

Section: Introductionmentioning

confidence: 99%

Design and Dynamic Model of a Frog-inspired Swimming Robot Powered by Pneumatic Muscles

Fan

Zhang

Kong

et al. 2017

Chin. J. Mech. Eng.

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Pneumatic muscles with similar characteristics to biological muscles have been widely used in robots, and thus are promising drivers for frog inspired robots. However, the application and nonlinearity of the pneumatic system limit the advance. On the basis of the swimming mechanism of the frog, a frog-inspired robot based on pneumatic muscles is developed. To realize the independent tasks by the robot, a pneumatic system with internal chambers, micro air pump, and valves is implemented. The micro pump is used to maintain the pressure difference between the source and exhaust chambers. The pneumatic muscles are controlled by high-speed switch valves which can reduce the robot cost, volume, and mass. A dynamic model of the pneumatic system is established for the simulation to estimate the system, including the chamber, muscle, and pneumatic circuit models. The robot design is verified by the robot swimming experiments and the dynamic model is verified through the experiments and simulations of the pneumatic system. The simulation results are compared to analyze the functions of the source pressure, internal volume of the muscle, and circuit flow rate which is proved the main factor that limits the response of muscle pressure. The proposed research provides the application of the pneumatic muscles in the frog inspired robot and the pneumatic model to study muscle controller.

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Dynamic analysis of pneumatic actuators

Cited by 33 publications

References 5 publications

Experimenting and modelling the dynamics of pneumatic actuators controlled by the pulse width modulation (PWM) technique

Experimenting and modelling the dynamics of pneumatic actuators controlled by the pulse width modulation (PWM) technique

Improving Gas Dynamic Models for Pneumatic Systems

Design and Dynamic Model of a Frog-inspired Swimming Robot Powered by Pneumatic Muscles

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