Model Based Controller Design for Position Control of Servo Controlled Hydraulic Actuator against Air Entrainment

Authors

  • Shilpesh M. Gupte Department of Mechanical Engineering, National Institute of Technology Karnataka, Mangalore, Karnataka, India
  • S M. Kulkarni Department of Mechanical Engineering, National Institute of Technology Karnataka, Mangalore, Karnataka, India
  • Mukesh Prasad Moog India Technology Centre, Bangalore, Karnataka, India

DOI:

https://doi.org/10.37591/joma.v3i2.7243

Keywords:

Position control, air entrainment, effective bulk modulus, model based controller design, stability analysis

Abstract

Position control is important for numerous industrial and aircraft applications. Electro-hydraulic actuators are used for position control for advantages they provide over other actuation systems. The hydraulic fluid used for actuation, though desired to be incompressible, has some compressibility in practice. Entrainment of air in the fluid increases compressibility effect by reducing the effective bulk modulus. Reduced bulk modulus makes position control difficult. The paper studies the effect of effective bulk modulus on system stability using the root locus approach. Thereafter, a model based controller has been designed to ensure stability and meet design requirements, even in case of practically high values of air entrainment

References

Electrohydraulic Valves: A Technical Look. MOOG.

http://hydraulicspneumatics.com/hydraulic-fluids/how-hydraulic-fluids-generate-air

https://en.wikipedia.org/wiki/Flight_with_disabled_controls

http://www.insidersecretstohydraulics.com/air-contamination.html

http://hydraulicspneumatics.com/hydraulic-fluids/how-hydraulic-fluids-generate-air

Karl Johan Astrom. Control System Design. 2002.

Wang Guofang Gong, Huayong Yang. Control of Bulk Modulus of Oil in Hydraulic Systems. International Conference on Advanced Intelligent Mechatronics, China. Jul 2–5, 2008; 1390–1395p.

Wang, Syrmos. Fault Detection, Identification and Estimation in the Electro-hydraulic Actuator System using EKF-Based Multiple-Model Estimation. 16th Mediterranean Conference on Control and Automation, France. Jun 25–27, 2008; 1693–1698p.

Lee, et al. A Position Control of Electro-Hydraulic Actuator Systems Using the Adaptive Control Scheme. Proceedings of the 7th Asian Control Conference, China. Aug 27–29, 2009.

MOOG 72 Series Servovalves. MOOG.

Thayer WJ. Transfer Functions for MOOG Servo Valves. MOOG Technical Bulletin. 1965; 103.

Merritt Herbert E. Hydraulic Control Systems. John Wiley and Sons; 1967.

George Herman F, Allan Barber. What is Bulk Modulus, and when is it Important? Lubrizol Corporation; 2007.

Katsuhiko Ogata. Modern Control Engineering. 4th Edn. Prentice Hall India.

Nagrath IJ, Gopal M. Control Systems Engineering. 5th Edn. New Age International.

http://ecee.colorado.edu/~mcclurel/resistorsandcaps.pdf.

Ibrahim D. Microcontroller Based Applied Digital Control. John Wiley and Sons; 2006.

Downloads

Published

2023-07-31

Issue

Vol. 3 No. 2 (2016)

Section

Articles

License

Declaration and Copyright Transfer Form

(to be completed by authors)

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

  • I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.
  • I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).
  • I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.
  •  I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. ________________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.