Suppression of Micro Stick-Slip Vibrations in Hydraulic Servo-System

Hayase, Toshiyuki; Hayashi, Satoru; Kojima, Kazunori; Iimura, Ikuro

doi:10.1115/1.482450

Cited by 6 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Calculated resonances in hydraulic systems at best are approximate" [3]. Close examination of hydraulics research indicates that values of the effective bulk modulus are just roughly assumed with no high degree of accuracy and these assumed values vary widely, despite similar oils and components [4][5][6]. Bulk modulus values do vary widely in practice and are usually unknown, ranging from 60,000 psi to 150,000 psi for common hydraulic systems [7].…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric-based fluid bulk modulus and diagnostic sensor

2003

View full text Add to dashboard Cite

Accurately knowing the bulk modulus of a fluid is very important in many hydraulic applications. The absolute bulk modulus has a major effect on the position, power delivery, response time and stability of virtually all hydraulic systems. Within this work a novel sensing technique to determine the bulk modulus of a fluid or hydraulic system is proposed. The constitutive equations of a piezoelectric actuator are coupled to a fluidic system that contains entrained air and mechanical compliance. The model can be used to extract the bulk modulus of the fluid system in real time. The results indicate that matching the stiffness of the actuator to the stiffness of the fluidic system is critical in obtaining a high sensitivity to the bulk modulus measurement.

show abstract

Section: Introductionmentioning

confidence: 99%

Piezoelectric-based fluid bulk modulus and diagnostic sensor

2003

View full text Add to dashboard Cite

show abstract

“…The modelling and simulation of friction has been draining huge scientific and industrial efforts for decades, addressing a large variety of applications and targets. The research activity dealing with friction is present in various scientific domains that are as different as materials shear and wear, 1 dynamics, 2 control, 3 micro and nano physics, 4 geophysics, 5 contacts 6 and even three-dimensional (3D) discretization schemes. 7 Among them, model-based system design has also generated a lot of work that aimed to reproduce, by simulation, the effects of friction at the system level.…”

Section: Introductionmentioning

confidence: 99%

Friction modelling and simulation at system level: a practical view for the designer

Maré

2012

Proceedings of the Institution of Mechanical Engineers, Part I:

View full text Add to dashboard Cite

The modelling and simulation of friction at the system level is addressed using a practical approach that aims at providing the developer of system level virtual prototypes with realistic modelling and numerically robust simulation of friction. In this attempt, the paper provides key knowledge for the efficient use, development or extension of friction model libraries for electromechanical and fluid power actuators. The first part is dedicated to the factors that may influence friction at component or equipment level. Besides the well documented effect of speed, the work focuses also on the effects of position, load, direction of power, temperature and time. The second part deals with friction modelling and its numerical implementation for simulation. Particular attention is paid to the transition between the sticking and the sliding modes. Accordingly, the candidate models are sorted into three generic types (static mass-free, dynamic mass-free and dynamic mass-integrated) in order to point out numerical issues as well as constraints that apply to the development and use of a friction model library. The models and their implementation are discussed from a practical point of view. Summary tables recapitulate the properties of the candidate friction models considering the reproduced effects, the numerical constraints and their availability in the most common one-dimensional simulation tools.

show abstract

“…Calculated resonances in hydraulic systems at best are approximate'' (Merritt, 1967). Close examination of hydraulics research indicates that values of the effective bulk modulus are just roughly assumed with no high degree of accuracy and these assumed values vary widely, despite similar oils and components (Watton, 1989;Hayase et al, 2000;Abbott et al, 2001). Bulk modulus values do vary widely in practice and are usually unknown, ranging from 4.14 Â 10 8 to 1.03 Â 10 9 Pa (60,000-150,000 psi) for common hydraulic systems (Habibi, 1999).…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric-based Fluid Bulk Modulus Sensor

Niezrecki¹,

Schueller²,

Balasubramanian

2004

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

The absolute bulk modulus has a major effect on the position, power delivery, response time, and stability of virtually all hydraulic systems. A novel sensing technique to determine the bulk modulus of a fluid or hydraulic system is proposed. The constitutive equations of a piezoelectric actuator are coupled to a fluidic system that contains entrained air and mechanical compliance. The model can be used to extract the bulk modulus of the fluid system in real time. The results indicate that matching the stiffness of the actuator to the stiffness of the fluidic system is critical in obtaining a high sensitivity to the bulk modulus measurement.

show abstract

Suppression of Micro Stick-Slip Vibrations in Hydraulic Servo-System

Cited by 6 publications

References 4 publications

Piezoelectric-based fluid bulk modulus and diagnostic sensor

Piezoelectric-based fluid bulk modulus and diagnostic sensor

Friction modelling and simulation at system level: a practical view for the designer

Piezoelectric-based Fluid Bulk Modulus Sensor

Contact Info

Product

Resources

About