Fuzzy logic–based intelligent control for hydrostatic journal bearing

Rehman, Waheed Ur; Luo, Yan; Wang, Yongqin; Guiyun, Jiang; Iqbal, Nadeem; Réhman, Shafiq Ur; Bibi, Shamsa

doi:10.1177/0020294019830110

Cited by 17 publications

(10 citation statements)

References 32 publications

(44 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the three aforementioned strategies involve complex mechanisms for the bearing or lubricant feeding system. Rehaman et al [147] proposed a fuzzy control method and tested it under different dynamic conditions of pressure, speed, viscosity, and working load (figure 24(b)). Under active control by the fuzzy method, hydrostatic bearings simultaneously achieved higher stiffness, response, stability, and controllability than traditional hydrostatic bearings.…”

Section: Active Hydraulic Resistance Modificationmentioning

confidence: 99%

Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Zhang,

Huang,

Chen

et al. 2024

Int. J. Extrem. Manuf.

View full text Add to dashboard Cite

Fluid lubricated bearings have been widely adopted for supporting components of high-end equipments in the field of metrology, semi-conductor, aviation, strategic defense, ultra-precision manufacturing, medical treatment and power generations. These fields all involve extreme working conditions such as ultra-high moving precision, ultra-high rotation speed, ultra-heavy bearing load, ultra-high environmental temperature, high radiation and high vacuum, which present challenges for the design and optimization of reliable fluid lubricated bearings. Breakthrough of any related bottlenecks will promote the development course of high-end equipments. To further promote the advancement of high-end equipments, this paper reviews the design and optimization of fluid lubricated bearings operated with typical extreme working performances. Targeting on the realization of extreme working perfor mances, the current challenges, the current solutions, the underlying deficiencies and the promising developing directions regarding to the design and optimization of fluid lubricat ed bearings are systematically pointed out. This paper can provide guidance for choosing suitable fluid lubricated bearings and optimizing their structures based on required extremeworking performances.

show abstract

Section: Active Hydraulic Resistance Modificationmentioning

confidence: 99%

Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Zhang,

Huang,

Chen

et al. 2024

Int. J. Extrem. Manuf.

View full text Add to dashboard Cite

show abstract

“…Especially when providing ancillary services to the grid, frequent start-stops are prominent. For these types of applications, recent research proposes active hydrostatic bearings, otherwise called hybrid bearings [24], [25]. a hydrostatic bearing, the lubricant pressure is not provided by the shaft rotational speed, but by external pumps.…”

Section: Bearings and Sealing Selectionmentioning

confidence: 99%

Axial Flux PMSM Power Take-Off for a Rim-Driven Contra-Rotating Pump-Turbine

Truijen

Kooning

Fauconnier

et al. 2022

2022 IEEE PES 14th Asia-Pacific Power and Energy Engineering Conference (APPEEC)

View full text Add to dashboard Cite

Pumped hydropower storage (PHS) is a costeffective and mature energy storage technology. However, it has inherently been limited to locations with suitable topographies. Therefore, the ALPHEUS project aims to implement PHS for shallow seas and coastal environments with the goal to support grid stability. To ensure optimal efficiency and fast switching times in these low-head applications, a 10 MW Contra-Rotating (CR) axial Reversible Pump-Turbine (RPT) is designed, which has a rim diameter of 6.4 m and a high efficiency -maximum 84% and 90% for pump and turbine, over a large operating range. Furthermore, the RPT is rim-driven, which averts the hydraulic impact caused by shaft-driven systems. To ensure optimal efficiency at variable speed operation, the runners are driven by two separate Axial-Flux Permanent Magnet Synchronous Machines (AF-PMSMs). This paper proposes a Power Take-Off (PTO) design, where the electric machines and bearings are integrated in the rim of the CR RPT. The AF-PMSM dimensional design results in an outside diameter of 6.87 m. Next, active hydrostatic bearings are proposed due to their higher lifetime compared to roller bearings and better start-stop behaviour compared to hydrodynamic bearings. Finally, the advantages of the rim-driven PTO design with AF-PMSMs are elucidated by means of a comparison with the PTO of a shaft-driven CR RPT with similar power ratings. Next to the differences in hydraulic impact and bearing and sealing complexity, the active mass of both PTOs is examined. It is shown that the rotary mass and the total mass the rim-driven PTO is respectively three times and six times lower than that of the shaft-driven PTO, while the permanent magnet usage for both PTOs remains similar, with the total permanent magnet mass being 1.1% lower for the rim-driven PTO.

show abstract

“…The eddy current sensors are used to monitor the gap of the hydrostatic bearing so that the load-carrying capacity can be improved by activating the hydrostatic support but there is deficiency in the low resolution of the eddy current sensors [12]. A servo control feedback system is introduced to monitor the fluid film gap and advance control techniques are proposed to improve the dynamic characteristics [13,14], but the deficiency is the lack of experimental validation. Magnetic fluid is used as an active lubricant input to control the fluid film thickness for achieving the high load-carrying capacity, but the drawback is that it only works with magnetic fluids [15].…”

Section: Introductionmentioning

confidence: 99%

Model-Based Design Approach to Improve Performance Characteristics of Hydrostatic Bearing Using Multivariable Optimization

et al. 2021

Self Cite

View full text Add to dashboard Cite

Research in the field of tribo-mechatronics has been gaining popularity in recent decades. The objective of the current research is to improve static/dynamics characteristics of hydrostatic bearings. Hydrostatic bearings always work in harsh environmental conditions that effect their performance, and which may even result in their failure. The current research proposes a mathematical model-based system for hydrostatic bearings that helps to improve its static/dynamic characteristics under varying conditions of performance-influencing variables such as temperature, spindle speed, external load, and clearance gap. To achieve these objectives, the capillary restrictors are replaced with servo valves, and a mathematical model is developed along with robust control design systems. The control system consists of feedforward and feedback control techniques that have not been applied before for hydrostatic bearings in the published literature. The feedforward control tries to remove a disturbance before it enters the system while feedback control achieves the objective of disturbance rejection and improves steady-state characteristics. The feedforward control is a trajectory-based controller and the feedback controller is a sliding mode controller with a PID sliding surface. The particle swarm optimization algorithm is used to tune the 6-dimensional vector of the tuning parameters with multi-objective performance criteria. Numerical investigations have been carried out to check the performance of the proposed system under varying conditions of viscosity, clearance gap, external load and the spindle speed. The comparison of our results with the published literature shows the effectiveness of the proposed system.

show abstract

Fuzzy logic–based intelligent control for hydrostatic journal bearing

Cited by 17 publications

References 32 publications

Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Axial Flux PMSM Power Take-Off for a Rim-Driven Contra-Rotating Pump-Turbine

Model-Based Design Approach to Improve Performance Characteristics of Hydrostatic Bearing Using Multivariable Optimization

Contact Info

Product

Resources

About