An experimental study on friction identification of a pneumatic actuator and dynamic modeling of a proportional valve

Lafmejani, Amir Salimi; Masouleh, Mehdi Tale; Kalhor, Ahmad

doi:10.1109/icrom.2016.7886840

Cited by 8 publications

(5 citation statements)

References 11 publications

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“…Generally, friction models include basic Coulomb, static, viscous and Stribeck type of friction (Liu et al, 2015;Lafmejani et al, 2016;Saleem et al, 2009). More detailed friction models such as Dahl (Dahl, 1968), Karnopp (Karnopp, 1985), LuGre (de Wit et al, 1995), Elastoplastic (Dupont et al, 2000), Leuven (Swevers et al, 2000), Generalized Maxell Slip (Al-Bender et al, 2005), and modified LuGre model (Saha et al, 2016) exist in literature for any sliding mechanical system.…”

Section: = μ * *mentioning

confidence: 99%

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Doğrusal Pnömati̇k Si̇li̇ndi̇rleri̇n Sürtünme Parametreleri̇ni̇n Tahmi̇ni̇

Dağdelen

Sarigecili

2020

Mühendislik Bilimleri Ve Tasarım Dergisi

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Nowadays, pneumatic actuation systems are utilized in many applications due to their outstanding advantages. However, the pneumatics possess nonlinear characteristics that complicate precise motion control. To extend the use of pneumatic actuators to different precise applications their non-linearity should be evaluated and compensated. This is only possible by correctly estimating the nonlinear parameters that exist in pneumatic systems. The friction forces in pneumatic cylinders is one of the main nonlinear parameters. These parameters cannot be defined directly or listed precisely for any produced particular cylinder in manufacturer's catalog. They should be estimated accurately by experimental methods. This paper presents a new, simple and cheap experimental method for identification of friction force parameters for standard linear double acting pneumatic cylinders. Two different pneumatic cylinders have been examined with the proposed method and it has been seen that the results sound promising to use in later control applications.

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Section: = μ * *mentioning

confidence: 99%

“…They proposed Recursive Least Square algorithm with the aid of experimental setup. Lafmejani et al (2016) proposed a method to define Coulombviscous friction model parameters for pneumatic cylinders.…”

Section: = μ * *mentioning

confidence: 99%

Doğrusal Pnömati̇k Si̇li̇ndi̇rleri̇n Sürtünme Parametreleri̇ni̇n Tahmi̇ni̇

Dağdelen

Sarigecili

2020

Mühendislik Bilimleri Ve Tasarım Dergisi

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“…Kosari et al [3] proposed RLS algorithm to estimate friction force parameters. Lafmejani et al [4], proposed the friction force parameters in the form of exponential, polynomial and Fourier series transform functions.…”

Section: F F =μ*P* Amentioning

confidence: 99%

“…However, these actuation systems have also nonlinearities and disadvantages due to the air compressibility and stick-slip phenomenon that takes place at the surfaces between cylinder barrel and piston seals. The friction forces affect the control performance of pneumatic cylinders and these forces are highlighted as the main nonlinearity reason in the literature [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Development of a Test Apparatus for Estimation of Friction Parameters at Linear Pneumatic Cylinders

Dağdelen

Sarigecili

2019

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Pneumatic cylinders possess non-linear characteristics due to the air-compressibility and stick-slip in cylinder barrel. Friction characteristics in pneumatic cylinders is one of the main non-linearity that negatively affects the precise control. To be able to use these actuator systems in high level control applications, their friction force models should be developed. Hence, unknown friction parameters should be estimated correctly since the friction parameters of pneumatic cylinders are not listed in the manufacturers' catalogue and these parameters cannot be calculated by only analytical methods. For that reason, in this study, a test apparatus is designed and experimental procedures are developed for the estimation of the friction parameters of linear pneumatic cylinders as in the form of static friction force, Coulomb friction force, Stribeck velocity and viscous damping coefficient.

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“…By deriving the state equation of ideal gases, we can get the equation which describe the air pressure changes in the two-pneumatic chamber [12,13]:…”

Section: State Equation Of Pneumatic Systemmentioning

confidence: 99%

Dimensionless Energy Conversion Characteristics of an Air-Powered Hydraulic Vehicle

2018

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Due to the advantages of resource conservation and less exhaust emissions, compressed air-powered vehicle has attracted more and more attention. To improve the power and efficiency of air-powered vehicle, an air-powered hydraulic vehicle was proposed. As the main part of the air-powered hydraulic vehicles, HP transformer (short for Hydropneumatic transformer) is used to convert the pneumatic power to higher hydraulic power. In this study, to illustrate the energy conversion characteristics of air-powered hydraulic vehicle, dimensionless mathematical model of the vehicle's working process was set up. Through experimental study on the vehicle, the dimensionless model was verified. Through simulation study on the vehicle, the following can be obtained: firstly, the increase of the hydraulic chamber orifice and the area ratio of the pistons can lead to a higher output power, while output pressure is just the opposite. Moreover, the increase of the output pressure and the aperture of the hydraulic chamber can lead to a higher efficiency, while area ratio of the pistons played the opposite role. This research can be referred to in the performance and design optimization of the HP transformers.presented. Furthermore, the mathematic model of the HP transformer was built. By selecting the appropriate parameter values, a dimensionless model was set up. To confirm the dimensionless mathematic model, an archetype was built and studied. Moreover, the output characteristics of the HP transformer can be studied through simulation study. Finally, the influence of the key parameters was showed to get the most suitable value. Structure of the Power System of the Air-Powered VehicleStructure of the power system of the air-powered vehicle was showed as Figure 1. From the diagram, we can easily get that the power system is primarily comprised by a compressed air tank, the HP transformer and a hydraulic motor. As the most important component of the system, the HP transformer consists of a pressure regulator, pneumatic and hydraulic chambers and an accumulator. Compressed air is stored in the air tank to provide the proper input pressure. The accumulator is used to accumulate and release energy [8,9].

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An experimental study on friction identification of a pneumatic actuator and dynamic modeling of a proportional valve

Cited by 8 publications

References 11 publications

Doğrusal Pnömati̇k Si̇li̇ndi̇rleri̇n Sürtünme Parametreleri̇ni̇n Tahmi̇ni̇

Doğrusal Pnömati̇k Si̇li̇ndi̇rleri̇n Sürtünme Parametreleri̇ni̇n Tahmi̇ni̇

Development of a Test Apparatus for Estimation of Friction Parameters at Linear Pneumatic Cylinders

Dimensionless Energy Conversion Characteristics of an Air-Powered Hydraulic Vehicle

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