scholarly journals Reuse of Exhausted Air from Multi-Actuator Pneumatic Control Systems

Actuators ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 125
Author(s):  
Milan Šešlija ◽  
Vule Reljić ◽  
Dragan Šešlija ◽  
Slobodan Dudić ◽  
Nikolina Dakić ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Control Systems ◽  
Dynamic Behavior ◽  
Motion Control ◽  
Energy Savings ◽  
Compressed Air ◽  
Pneumatic System ◽  
Pneumatic Actuators ◽  
Pneumatic Control ◽  
Control Scheme

In order to improve the energy efficiency of multi-actuator pneumatic systems, a control scheme for the recovery of exhausted compressed air is designed and studied herein. This paper explains the procedure for the development of the balanced operation of a multi-actuator pneumatic system through the collection and reuse of exhausted compressed air. Compared with traditional motion control of pneumatic actuators, significant energy savings can be achieved, while the dynamic behavior of the cylinders from which the exhausted air is collected is maintained.

scholarly journals Improving energy efficiency in compressed air systems - practical experiences

2016 ◽  
Vol 20 (suppl. 2) ◽  
pp. 355-370 ◽  
Author(s):  
Dragan Seslija ◽  
Ivana Milenkovic ◽  
Slobodan Dudic ◽  
Jovan Sulc
Keyword(s):  
Control Systems ◽  
Systematic Approach ◽  
System Analysis ◽  
Energy Savings ◽  
Compressed Air ◽  
Robotic Cell ◽  
Pneumatic Control ◽  
Production And Consumption ◽  
Strategy Identification ◽  
Practical Experiences

This paper presents practical experiences of savings within compressed air systems with the special attention to the compressed air end uses, particularly in pneumatic control systems. Firstly, the systematic approach to energy savings is presented. Following, various energy-saving measures have been reviewed. They encompassed system analysis and harmonization of production and consumption, minimisation of loses (leak prevention strategy, identification and quantification of leakages), possibilities for reducing pressure drop on filters, and three methods for optimization of pneumatic control: by-pass control, PWM control, and usage of exhaust air. Finally, energy conservation of a complex robotic cell with installed electric and pneumatic devices is shown.

Influence of Volumetric Capacity on Energy Consumption in Oil-Lubricated Compressed Air Systems

2016 ◽  
Vol 8 (4) ◽  
Author(s):  
Pawel Olszewski ◽  
Claus Borgnakke
Keyword(s):  
Mathematical Model ◽  
Energy Efficiency ◽  
Energy Consumption ◽  
Potential Energy ◽  
Uncertainty Analysis ◽  
Control Strategy ◽  
Energy Savings ◽  
Compressed Air ◽  
Numerical Code ◽  
Volumetric Capacity

The aim of this research is to estimate the influence of compressed air volumetric capacity on the energy consumption in systems equipped with oil-lubricated screw compressors. A mathematical model of oil-lubricated screw compressors has been proposed. The model is verified by comparing with real measurements, and overall uncertainty analysis is estimated. An in-house developed numerical code (c++) is used to calculate the energy consumption in 252,000 combinations. The final result can be used to estimate the energy efficiency of existing air systems and to assess potential energy savings due to changes in the operation of the system and its control strategy.

Digital Motion Control and Profile Planning for Pneumatic Servos

1992 ◽  
Vol 114 (4) ◽  
pp. 634-640 ◽  
Author(s):  
J. Pu ◽  
R. H. Weston ◽  
P. R. Moore
Keyword(s):  
Motion Control ◽  
Transient Behavior ◽  
Performance Characteristics ◽  
Motion Controller ◽  
Operating Characteristics ◽  
Servo Systems ◽  
Pneumatic Actuators ◽  
Control Scheme ◽  
Conventional Methods ◽  
The Stability

This paper considers the use of “profile-planning” to (i) improve/optimize certain performance characteristics of pneumatic servos and (ii) simplify procedures associated with their tuning. The underlying approach is to preplan the transient behavior of the system thereby generating an appropriate command profile. To assist in applying this technique to the control of air-powered servo-systems, the paper highlights important knowledge derived previously with regard to the stability and operating characteristics of pneumatic drives. Preliminary rules for conducting such planning are then proposed with reference to a series of experimental observations. This approach can be employed to significantly reduce or prevent overshoot and instability of servo-driven pneumatic actuators (cylinders in particular) which are difficult to overcome by using conventional methods. At the same time, increased operating speeds and improved positioning can be attained. The proposed control scheme has been implemented in prototype form through using a proprietary programmable motion controller which incorporates software mechanism for generating gearbox and cam-like motion profiles.

Energy efficient throttling control of a multi-pressure system using a genetic algorithm and model predictive control

2021 ◽  
pp. 095965182110277
Author(s):  
Mikko Huova ◽  
Matti Linjama
Keyword(s):  
Energy Efficiency ◽  
Energy Savings ◽  
Hydraulic Cylinder ◽  
Pressure System ◽  
Velocity Feedback ◽  
Load Variations ◽  
Control Scheme ◽  
Good Energy ◽  
System Robustness ◽  
Harsh Conditions

The energy efficiency of hydraulic cylinder drives can be increased by replacing the actuator with a multi-chamber cylinder, utilising multiple supply lines with unique pressures or a combination of the concepts. Previous studies have demonstrated significant energy savings using a cascaded control system, which requires velocity feedback to stabilise the system. To avoid the need of position or velocity sensors in harsh conditions of mobile machines, this article presents a throttling control scheme, which achieves good energy efficiency on multi-pressure systems without velocity feedback. A simulation study was performed to determine the efficiency of the system, robustness against load variations and the effect of valve response time on performance.

scholarly journals Development of an Experimental Setup for Remote Testing Pneumatic Control

2018 ◽  
Vol 14 (01) ◽  
pp. 195
Author(s):  
Vule Reljić ◽  
Brajan Bajci ◽  
Ivana Milenković ◽  
Jovan Šulc ◽  
Dragan Šešlija ◽  
...  
Keyword(s):  
Control Systems ◽  
Motion Control ◽  
Experimental Setup ◽  
Air Analysis ◽  
Control Cost ◽  
Pneumatic Control ◽  
Remote Testing ◽  
Working Cycle ◽  
Effectiveness Analysis ◽  
New Situation

This paper presents an experimental setup called pneumatic circular manipulator. The manipulator represents a modular setup that can be adapted to the new situation by simple transformations. It is used for testing various types of pneumatic control and energy efficiency of pneumatic control systems. The manipulator is primarily intended for students and their lectures. Since it has the possibility for remote control over the Internet, due to its modularity, it can be very interesting for researchers and employees in industry. The existing version of the manipulator allows visual monitoring of the working cycle and familiarization with the basics of pneumatic control and motion control for users. By future upgrade, the manipulator will become a setup that will provide feedback on the consumption of compressed air, analysis of the type of control, cost-effectiveness analysis etc.

Design of a Pressure Observer and its Application to a Low-Cost Pneumatic Control System

2011 ◽  
Vol 5 (4) ◽  
pp. 493-501 ◽  
Author(s):  
Takahiro Kosaki ◽  
◽  
Manabu Sano
Keyword(s):  
Control System ◽  
Control Systems ◽  
Low Cost ◽  
Force Sensors ◽  
Pneumatic Actuators ◽  
Pneumatic Control ◽  
Full State ◽  
Full State Feedback ◽  
High Control ◽  
Pressure Observer

The nonlinear pressure observer this paper presents for pneumatic systems and observer-based approaches for controlling position and stiffness eliminate the need for pressure and force sensors. The observer estimates pressure in the pneumatic actuator chamber, acting instead of a sensor in a pressure-feedbackbased system. Conventional single-loop controllers are inadequate for pneumatic actuators because such actuators have high nonlinearities such as air compressibility and friction. Most advanced controllers providing better performance require full-state feedback, and using sensors to acquire data makes pneumatic control systems less cost-competitive than electric control systems. Combining our proposed pressure observer with other observers enables a position and stiffness control system to be designed for a two degree-of-freedom pneumatic manipulator. Force caused in contact between the manipulator and an external object can be obtained without using force sensors. Experimental results show that our observerbased approach reduces cost, enables high estimation performance, and ensures high control accuracy.

scholarly journals Experimental model for energy efficiency examination of pneumatic system

2011 ◽  
Vol 24 (1) ◽  
pp. 21-30
Author(s):  
Vladislav Blagojevic ◽  
Miodrag Stojiljkovic ◽  
Vlastimir Nikolic
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Electric Power ◽  
Experimental Model ◽  
Electrical Power ◽  
Servo System ◽  
Compressed Air ◽  
Pneumatic System ◽  
Large Energy

In pneumatic systems, which represent large energy consumers, energy saving is very important. Mostly, the costs of the electric power used for feeding the compressors in the production of compressed air amount to around 20% of the overall costs of electrical power for some factory. In order to examine energy efficiency of conventional pneumatic system as well as servo system, no matter on actuator type, in this paper the new experimental model for energy efficiency examination is proposed. It consists of two important parts, such as electric and pneumatic part. The conducted experiments have demonstrated that this new experimental model provides satisfactory results of actuator positioning and energy efficiency as well.

Proposal of Power Determination and Measurement of Compressible Air

2010 ◽  
Vol 34-35 ◽  
pp. 551-556 ◽  
Author(s):  
Chong Liu ◽  
Mao Lin Cai
Keyword(s):  
Energy Efficiency ◽  
Energy Loss ◽  
Energy Distribution ◽  
Evaluation System ◽  
Measurement Method ◽  
Compressed Air ◽  
Pneumatic System ◽  
Air Power ◽  
Power Transducer ◽  
Pneumatic Power

This paper proposes a representation and measurement method for compressed air power widely used by various industries in the industrial. It proposes an accurate and standardized way to represent and measure the power energy in unit time of the flow compressed air, then establishes the evaluation system in energy distribution, loss and use in pneumatic system, which can clear the energy loss in pneumatic system and its components. Pneumatic power transducer designed in accordance with pneumatic power, it has advanced functions and higher precision, which can promote the energy efficiency greatly in pneumatic system.

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