Dynamic Characteristics of Hydrostatic Thrust Air Bearing With Actively Controlled Restrictor

Sato, Yuichi; Maruta, K.; Harada, Masatoshi

doi:10.1115/1.3261556

Cited by 19 publications

(6 citation statements)

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“…Active compensation belongs to the field of mechatronics that is opening new possibilities in system design. The past two decades have witnessed increased activity in active control of air bearings, in particular for precise positioning applications [18][19][20][21][22][23][24]. In the rest of this paper, Fig.…”

Section: Active Compensationmentioning

confidence: 99%

On the modelling of the dynamic characteristics of aerostatic bearing films: From stability analysis to active compensation

Al‐Bender

2009

Precision Engineering

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a b s t r a c tDetermination of the static characteristics of air bearings constitutes the necessary first phase in a design problem, which determines general feasibility. In order to realize a successful application, a good knowledge and assessment of the dynamic behaviour is needed to complement the previous step. In a conventional, passive bearing application, dynamically stable behaviour should be ensured by overcoming the occurrence of self-excited vibrations; the so-called "pneumatic hammering". In active bearing applications, on the other hand, the dynamic bearing force, induced by actuation of the gap geometry or supply pressure, provides for a means of enhancing bearing static and dynamic performance, when integrated in a mechatronics system context. This paper presents on the one hand an overview of the methods used to model the dynamic characteristics of aerostatic films, deducing that the method of harmonic perturbation is often sufficient in providing a good estimate of the dynamic stiffness. This is confirmed by comparing theoretical results with dynamic response experiments. On the other hand, the general problem of active dynamic compensation is outlined and an application example is provided to show the high levels of performance achievable by employing this method.

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Section: Active Compensationmentioning

confidence: 99%

On the modelling of the dynamic characteristics of aerostatic bearing films: From stability analysis to active compensation

Al‐Bender

2009

Precision Engineering

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“…Active control of air bearings is based on modifying the dynamic bearing force in order to control the position and compensate for deviations from the expected performance. Research activity in this field started more than 20 years ago, in particular for precise positioning applications [1][2][3][4]. The laboratory results are promising, but the step to industrial application has not been achieved yet, due to a combination of several reasons, e.g.…”

Section: Introductionmentioning

confidence: 99%

A multiphysics model for optimizing the design of active aerostatic thrust bearings

Aguirre

Al‐Bender

Brussel

2010

Precision Engineering

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“…Some of them use servo valve as the active device for active compensation to improve stiffness [8][9][10]. It is proved that stability of infinite stiffness aerostatic bearing can be increased by controlling the restrictor area with appropriate phase lag to change air gap [11]. Two kinds of restrictor using PZT are much more famous such as; active inherent restrictor and exhausted controlled restrictor.…”

Section: Introductionmentioning

confidence: 99%

“…When we integrate active inherent restrictor to air bearing then they perform the job of movable nozzles and helps to attain pressure variation without changing supply pressure. The second restrictor is exhaust controlled restrictor [11] The exhaust control restrictor consists of a piezoelectric actuator, amplifier and preload screw. It controls the air gap by changing the coefficient of the exhaust channel [12].…”

Section: Introductionmentioning

confidence: 99%

A New Type of Aerostatic Thrust Bearing Controlled by High-speed Pneumatic Valve and a Novel Pressure Transducer

Rehman

Guiyun

Wang

et al. 2019

IJAME

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The current research work presents a low cost, efficient and innovative active aerostatic thrust bearing which is controlled through a combination of the Arduino board, feedback transducers and high-speed valves. The purpose is to make low cost, compact active aerostatic thrust bearing with overall small dimensions and compact size. A prototype design is done in solid works with small dimensions and components are produced with the help of the high precision machining process. There are two high-speed electropneumatic valves which are controlled through pulse width modulation techniques. These high-speed electro-pneumatic valves modify the supply pressure of aerostatic bearing to achieve desired air height gap. There are two novel pressure sensors which provide a feedback signal for control. The test bench to perform experiments has been explained. The performance of the proposed aerostatic bearing is checked both in open loop and closed loop configuration with respect to static and dynamic conditions.

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Dynamic Characteristics of Hydrostatic Thrust Air Bearing With Actively Controlled Restrictor

Cited by 19 publications

References 0 publications

On the modelling of the dynamic characteristics of aerostatic bearing films: From stability analysis to active compensation

On the modelling of the dynamic characteristics of aerostatic bearing films: From stability analysis to active compensation

A multiphysics model for optimizing the design of active aerostatic thrust bearings

A New Type of Aerostatic Thrust Bearing Controlled by High-speed Pneumatic Valve and a Novel Pressure Transducer

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