An active control for hydrostatic journal bearing using optimization algorithms

Purpose The purpose of this paper is to improve static/dynamic characteristics of active-controlled hydrostatic journal bearing by using fractional order control techniques and optimizing algorithms. Design/methodology/approach Active lubrication has ability to overcome the unpredictable harsh envir...

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Bibliographic Details
Published in:Industrial lubrication and tribology 2021-03, Vol.73 (2), p.316-324
Main Authors: Ur Rehman, Waheed, Wang, Xinhua, Chen, Yingchun, Yang, Xiaogao, Ullah, Zia, Cheng, Yiqi, Kanwal, Marya
Format: Article
Language:English
Subjects:
Active control
Algorithms
Compensation
Control stability
Control systems
Controllability
Design optimization
Dynamic characteristics
Film thickness
Journal bearings
Laplace transforms
Literature reviews
Mathematical analysis
Mathematical models
Optimization algorithms
Particle swarm optimization
Pressure distribution
Proportional integral derivative
Servocontrol
Stiffness
Thrust bearings
Velocity
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Summary:Purpose The purpose of this paper is to improve static/dynamic characteristics of active-controlled hydrostatic journal bearing by using fractional order control techniques and optimizing algorithms. Design/methodology/approach Active lubrication has ability to overcome the unpredictable harsh environmental conditions which often lead to failure of capillary controlled traditional hydrostatic journal bearing. The research develops a mathematical model for a servo feedback-controlled hydrostatic journal bearing and dynamics of model is analyzed with different control techniques. The fractional-order PID control system is tuned by using particle swarm optimization and Nelder mead optimization techniques with the help of using multi-objective performance criteria. Findings The results of the current research are compared with previously published theoretical and experimental results. The proposed servo-controlled active bearing system is studied under a number of different dynamic situations and constraints of variable spindle speed, external load, temperature changes (viscosity) and variable bearing clearance (oil film thickness). The simulation results show that the proposed system has better performance in terms of controllability, faster response, stability, high stiffness and strong resistance. Originality/value This paper develops an accurate mathematical model for servo-controlled hydrostatic bearing with fractional order controller. The results are in excellent agreement with previously published literature. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2020-0272
ISSN:0036-8792
1758-5775
DOI:10.1108/ILT-07-2020-0272