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

Šešlija, Dragan; Cajetinac, S.; Blagojević, Vladislav; Šulc, Jovan

doi:10.1177/0959651818780858

Cited by 6 publications

(8 citation statements)

References 15 publications

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“…An energy saving approach, achieved by adding a by-pass flow-enabling valve between the chambers of the cylinder, is proposed in [21,22]. Instead of using proportional valve, the joint application of a PWM and by-pass chamber control of the pneumatic rodless cylinder was introduced in [23]. An important advantage of PWM control is lower consumption of compressed air.…”

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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Section: Energy Efficiency Of Compressed Air Systemsmentioning

confidence: 99%

Improving Energy Efficiency of Flexible Pneumatic Systems

et al. 2021

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“…Shen et al [8] and Yang et al [9] proposed an energy saving approach by supplementing a standard spool valve-controlled pneumatic actuator with an additional two-way valve that enables flow between the cylinder chambers. Seslija et al [10] introduced the application of pulse-width modulation and by-pass chamber control of the pneumatic rodless cylinder. Bartyś et al [11] proposed three practical measures of electro-pneumatic control quality, namely: variability, mean time, and cumulative effort.…”

Section: Introductionmentioning

confidence: 99%

“…Some of them proposed new booster valves [3,4]. Others reused exhaust air from one pneumatic component to the same component [5,[8][9][10]15,16] or another component [6,15]. There were papers that proposed a new algorithm of control [2], optimization of positioner controller settings [11], and reducing air leakage to improve the energy efficiency of the whole pneumatic system [12].…”

Section: Introductionmentioning

confidence: 99%

Energy Efficiency of Pneumatic Cylinder Control with Different Levels of Compressed Air Pressure and Clamping Cartridge

et al. 2020

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Since pneumatic systems are widely used in various branches of industry, the need to find ways to reduce energy consumption in these systems has become very pressing. The reduction in energy consumption in these systems is reflected in the reduction of compressed air consumption. The paper presents a cylinder control system with a piston rod on one side, in which the reduction in energy consumption is ensured by using different levels of supply pressure in the working and the return stroke, and by holding the cylinder piston rod in its final positions with a clamping cartridge. Clamping and holding the piston rod in its final position further affects the reduction in energy consumption. Experimental data show that the application of the proposed control leads to a decrease in compressed air consumption of 25.54% to 32.97%, depending on the compressed air pressure used in the return stroke. The cost-effectiveness of the proposed cylinder control with different levels of compressed air pressure and holding the final position by clamping cartridge is presented.

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“…However, this valve is very expensive. PWM technique was used to drive low cost on/off solenoid valves to improve the positioning accuracy with several control methods, [7][8][9][10][11]. Salim et al, [12], used a self-regulated nonlinear PID and compared the results with conventional nonlinear PID.…”

Section: Introductionmentioning

confidence: 99%

Simulation Study and Experimental Position Control of Pneumatic Cylinder Using Sliding Mode Control with on/off Control Valves

Elsayed

Hammam

Mousa

et al. 2020

Port-Said Engineering Research Journal

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Simulation and experimental studies of pneumatic cylinder position control are introduced. High speed on-off solenoid air valve is used instead of the proportional control valve. Sliding mode control with error modification (SMCE) is proposed to drive the air valves with pulse width modulation (PWM) technique. Comparison of the performance of the closed loop position control using SMCE with the traditional PID is held. The simulation model is used to optimize the SMC and PID controller parameters to start the experimental test as a first trial. The experimental results for square and sinusoidal position reference show superiority of the SMCE over the PID in terms of lower steady state errors, faster settling time, and less overshoot. The root mean square error for a sinusoidal input of 0.1 Hz is 0.22 mm for SMCE and 0.69 mm for PID controller. The maximum absolute errors are 0.66 mm and 1.46 mm for SMCE and PID, respectively.

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

Cited by 6 publications

References 15 publications

Improving Energy Efficiency of Flexible Pneumatic Systems

Improving Energy Efficiency of Flexible Pneumatic Systems

Energy Efficiency of Pneumatic Cylinder Control with Different Levels of Compressed Air Pressure and Clamping Cartridge

Simulation Study and Experimental Position Control of Pneumatic Cylinder Using Sliding Mode Control with on/off Control Valves

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