MATEC Web Conf.
Volume 95, 20172016 the 3rd International Conference on Mechatronics and Mechanical Engineering (ICMME 2016)
|Number of page(s)||6|
|Section||Control Theory and Technology|
|Published online||09 February 2017|
A Hybrid Controller for Position Control of a Pneumatic Actuator under Variable Loading Conditions
Mechanical Engineering Department, National Institute of Technical Teachers Training and Research, Chandigarh, India
Pneumatic actuators are preferred for low to medium power requirements due to their desirable features like large power to weight ratio, low cost and safe working medium. Position control of pneumatic actuators is however difficult due to inherent nonlinearity-contributing factors. Therefore, position control of pneumatic actuators have been found to be a challenging task using fixed gain controllers. Sliding mode control can be used to overcome this difficulty. Further, the nonlinear response of pneumatic actuators under variable loading conditions makes it a fit case for using heuristic control based on the knowledge of the system behaviour. This may be done by using fuzzy logic based control approach. In the present work, a hybrid controller was synthesized using fuzzy logic control and sliding mode control for position control of a pneumatic actuation system. The quantitative results emphasized that hybrid FLC-SMC controller exhibited effective position control for pneumatic actuation system as fuzzy logic control was effective for combinations of lower payloads and smaller piston displacements, whereas sliding mode controller was effective for combinations of higher payloads and larger piston displacements.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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