A novel, low-cost pneumatic positioning system

Thomas, M. Brian; Maul, Gary P.; Jayawiyanto, Enrico

doi:10.1016/s0278-6125(05)80021-4

Cited by 15 publications

(8 citation statements)

References 9 publications

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“…Consequently then the piston moves with low speed, permits the air in the rod side to flee freely, and can be considered incompressible gas. In this method, for an ideal, frictionless cylinder, the volume of air added to the piston side of the cylinder is assumed to be equal to the volume of air removed from the second chamber [12]. Fig -19 and Fig -20 respectively show the front and backpressure of the cylinder when extending the cylinder with different supply pressure with meter-in flow control.…”

Section: Controlling the Air Flow Ratementioning

confidence: 99%

“…To decrease the cost of such systems the use of low cost on/off solenoid valves instead of the expensive proportional and servo valves has been a subject of study over the last decades. [12] In order to develop and improve the performance of any system, modeling and simulation is used as a first step to decrease the amount of experimental work and consequently save money and components life time. Modeling and simulation can be carried out by two methods.…”

Section: Introductionmentioning

confidence: 99%

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Parametric Study of a Low Cost Pneumatic System Controlled by on/Off Solenoid Valves

Youssry¹

2016

IJRET

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Expensive proportional valves are dominantly used in pneumatic positioning systems even with low demanding accuracy positioning tasks, which deprive pneumatic systems from its economical advantages. Thereby, using low cost on/off solenoid valves instead of proportional valves has been a topic of research in the last decades. In this paper, a parametric study is conducted to investigate the effect of using low-cost 3/2 internally pilot on/off solenoid valves to control a double acting cylinder and study the system nonlinear response to on/off and PWM input signal. Matlab ® Simscape library is used to model and simulate the system. The model is validated though experimental measurements of the system behavior. The model is used to study and decrease the nonlinear pressure response associated with the cylinder chambers in addition to the evaluation of the dead zone and operating range of the on/off solenoid valve when operated with PWM signal. The results show that using a meter-in flow control and having a near constant cylinder back pressure can reduce the nonlinearity. An orifice of 1e-6 m2 can reduce the pressure variation by 80% but increase the transient time. Connecting an accumulator with 1 liter volume can result in 50% reduction in rod side pressure variation. The model has been used to predict the PWM parameters as well. It has been found that the most suitable parameters for this valve are 20 Hz and duty cycle from 12 to 65%. These results encourage going further with controlling a pneumatic position system using low-cost control valves and a simple controller.

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Section: Controlling the Air Flow Ratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parametric Study of a Low Cost Pneumatic System Controlled by on/Off Solenoid Valves

Youssry¹

2016

IJRET

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“…In 2005, a PWM-driven solenoid valve was introduced to control the exhaust flow from the cylinder [60]. Duty cycles of PWM were determined from modified PD-controller.…”

Section: G Others Controllermentioning

confidence: 99%

Review on Modeling and Controller Design in Pneumatic Actuator Control System

Rahmat

Sunar

Salim

et al. 2011

International Journal on Smart Sensing and Intelligent Systems

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“…Sustainable efforts are made in this direction in order to reduce the costs. [7] An example of a solution that attempts to solve this problem is proposed by SMC ( fig.1, [8], [9]). …”

Section: Introductionmentioning

confidence: 99%

Research Regarding the Design of a Closed-Loop Pneumatic Positioning System Without Using Proportional Equipment

2017

IJOMAM

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Abstract. The paper shows the design, manufacturing and testing of a new type of closed-loop pneumatic positioning system. The design is comprised solely of on/off equipment, which ensures overall low cost. Exhaust flow control and thus speed control for both directions of movement is done by means of several groups of way valves. This ensures that the system can obtain different speeds. Maximum speed is obtained when all of the way valves are open and minimum speed is obtained by using only one way valve. The last version is used close to the desired position to ensure the low speed needed to obtain precision. System control is done by means of a microcontroller that stores and executes the working programs.

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A novel, low-cost pneumatic positioning system

Cited by 15 publications

References 9 publications

Parametric Study of a Low Cost Pneumatic System Controlled by on/Off Solenoid Valves

Parametric Study of a Low Cost Pneumatic System Controlled by on/Off Solenoid Valves

Review on Modeling and Controller Design in Pneumatic Actuator Control System

Research Regarding the Design of a Closed-Loop Pneumatic Positioning System Without Using Proportional Equipment

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