Compressed air saving in symmetrical and asymmetrical pneumatic positioning systems

Endler, Luciano; Negri, Victor Juliano De; Castelan, Eugênio B.

doi:10.1177/0959651815597819

Cited by 9 publications

(9 citation statements)

References 19 publications

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“…Also, return of investment period is very small. Similar research was done by Endler et al 10 where a new scheme for reducing compressed air is presented in case of asymmetrical and symmetrical pneumatic positioning systems using 5/3 directional proportional valve and pulse width modulation (PWM) control. With proposed scheme, the compressed air consumption is reduced by 47%-57%.…”

Section: Introductionmentioning

confidence: 71%

Application of pulse width modulation and by-pass valve control for increasing energy efficiency of pneumatic actuator system

Šešlija

Cajetinac²,

Blagojević

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part I:

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Control of a pneumatic actuator using pulse width modulation (control) represents a good alternative for control of pneumatic actuator that uses proportional valve. Important advantage of pulse width modulation control is fewer consumption of compressed air. In addition, air consumption can be further reduced by the use of inter-chamber cross flow (chamber bypassing). This article discusses joint application of pulse width modulation and bypass chamber control on the example of pneumatic rodless cylinder which is controlled by programmable logic controller. Saving of compressed air was experimentally determined, as well as the influence of inter-chamber cross flow on the quality of the control. With this application of pulse width modulation and bypass valve control, pneumatic actuator system shows that 30% of energy can be saved under the same working conditions in comparison to the traditional pulse width modulation control system.

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Section: Introductionmentioning

confidence: 71%

Application of pulse width modulation and by-pass valve control for increasing energy efficiency of pneumatic actuator system

Šešlija

Cajetinac²,

Blagojević

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part I:

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“…According to a report (Riofrío et al 2015), viscous friction is a nonlinear function of velocity, where velocity is inversely proportional to the viscous friction at an inverse power rate. On the other hand, a report (Endler et al 2015) pointed out that the static friction value may be slightly higher, and the limit speeds lower in which the experiments have determined the speed limit and the static friction (these points correspond to lower velocity).…”

Section: Mathematical Modeling Of Pneumatic Systemmentioning

confidence: 98%

Cascade Control Strategy on Servo Pneumatic System with Fuzzy Self-Adaptive System

Irawan

Azahar

2020

J Control Autom Electr Syst

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Servo pneumatic position control has gained considerable attention due to its superiority in improving the precision of automation and mechatronic systems. This paper presents the proposed cascaded fuzzy self-adaptive with proportional, integral, and derivative (CFSAPID) control strategy in providing an accurate rod-piston displacement as desired input with stable pressure in chambers. Unlike the conventional cascade strategy, the control law of proposed CFSAPID was designed based on the Mamdani-type fuzzy approach as a dynamic tuner to each stage in the proportional, integral, and derivative (PID) controller that deals with the nonlinearity of servo pneumatics adequately. The bounder sector zone of Mamdani-type fuzzy was determined based on position and velocity states on servo pneumatic rod-piston, and the parameter was constructed to obtain the optimum gain parameters of PID in each stage. The proposed CFSAPID was verified using a pneumatic proportional valve with a double-acting cylinder dynamic model plant. Simulation and analyses were emphasized on steady-state error, difference in pressures of pneumatic cylinder's chambers, hysteresis effect, tuning parameters convergence, performance criteria, and performance indices. The results show that the proposed CFSAPID controller was able to withstand the load disturbances, at variable input trajectory with a stable pressure in chambers at almost minimum hysteresis effect compared to the FSAPID and single PID controllers.

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“…In accordance with what has been previously mentioned, a newly developed booster valve was proposed in [17,18], with the possibility of collecting and reusing compressed air energy in order to reduce the compressed air consumption. Another possible scheme, containing a fast switching on/off valve, was introduced in [19]. That valve is controlled using a pulse-width modulation (PWM) technique associated with another Proportional-Integral (PI) controller, and whose role is to connect the chambers of the cylinder to reduce the compressed air consumption of pneumatic positioning systems with external loads.…”

Section: Energy Efficiency Of Compressed Air Systemsmentioning

confidence: 99%

Improving Energy Efficiency of Flexible Pneumatic Systems

et al. 2021

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During pneumatic control system design, the critical value for choosing the appropriate pneumatic actuator is the weight of the workpiece. In the case of flexible production systems, which are the core part of the Industry 4.0 (I4.0) concept, the weight of the workpieces is often variable, since the crucial feature of this kind of production is its ability to deal with variable parts. Therefore, in order to deal with the variable weight of parts, a pneumatic actuator is chosen according to the heaviest part. However, according to another I4.0 principle, energy efficient operation of machines, the previous criteria for choosing a pneumatic actuator is energy efficient only when handling the heaviest part. In all other cases, operation of the pneumatic actuator is suboptimal in terms of energy efficiency. Aiming to solve this problem, this paper considers the possibility of using a new pressure regulator instead of traditional manually adjusted pressure regulators. This regulator provides operating pressure modification in real-time in accordance with the weight of the workpieces. In this way, the optimal compressed air consumption is ensured for each workpiece. Implementation of this device has yielded significant energy savings; however, the value is variable and depends on working task characteristics.

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Compressed air saving in symmetrical and asymmetrical pneumatic positioning systems

Cited by 9 publications

References 19 publications

Application of pulse width modulation and by-pass valve control for increasing energy efficiency of pneumatic actuator system

Application of pulse width modulation and by-pass valve control for increasing energy efficiency of pneumatic actuator system

Cascade Control Strategy on Servo Pneumatic System with Fuzzy Self-Adaptive System

Improving Energy Efficiency of Flexible Pneumatic Systems

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