Waves in a guiding system with azimuthally magnetized ferrite

V. P. Prudkin; Yu. M. Terent'ev

doi:10.1007/bf01034627

Eddy Current Effects on the Guiding System of High-Speed Maglev Train

2019 22nd International Conference on Electrical Machines and Systems (ICEMS) ◽

10.1109/icems.2019.8922563 ◽

2019 ◽

Author(s):

Yongpan Hu ◽

Jiewei Zeng ◽

Zhiqiang Long ◽

Mingda Zhai

Keyword(s):

Eddy Current ◽

High Speed ◽

Maglev Train ◽

Guiding System

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Investigation of X and Y Configuration Modal and Dynamic Response to Velocity Excitation of the Nanometer Resolution Linear Servo Motor Stage with Quasi-Industrial Guiding System in Quasi-Stable State

Mathematics ◽

10.3390/math9090951 ◽

2021 ◽

Vol 9 (9) ◽

pp. 951

Author(s):

Artur Piščalov ◽

Edgaras Urbonas ◽

Darius Vainorius ◽

Jonas Matijošius ◽

Artūras Kilikevičius

Keyword(s):

Dynamic Response ◽

System Analysis ◽

Operating Time ◽

Stable State ◽

Degree Of Freedom ◽

Diagnostic Tools ◽

Nanometer Scale ◽

Positioning Systems ◽

Industrial Enterprises ◽

Guiding System

Research institutions and industrial enterprises demand high accuracy and precision positioning systems to fulfil cutting edge requirements of up-to-date technological processes in the field of metrology and optical fabrication. Linear motor system design with high performance mechanical guiding system and optical encoder ensures nanometer scale precision and constant static error, which can be calibrated by optical instruments. Mechanical guiding systems has its benefits in case of control theory and its stability; unfortunately, on the other hand, there exists high influence of structure geometry and tribological effects such as friction and modal response. The aforementioned effect cannot be straightforwardly identified during the assembly process. Degradation of dynamic units can be detected only after certain operating time. Single degree of freedom systems are well investigated and the effect of degradation can be predicted, but there exists a gap in the analysis of nanometer scale multi degree of freedom dynamic systems; therefore, novel diagnostic tools need to be proposed. In this particular paper, dual axes dynamic system analysis will be presented. The main idea is to decouple standard stacked XY stage and analyse X and Y configuration as two different configurations of the same object, while imitators of corresponding axes are absolutely solid and stationary. As storage and analysis of time domain data is not efficient, main attention will be concentrated on frequency domain data, while, of course, statistical and graphical representation of dynamic response will be presented. Transfer function, dynamic response, spectral analysis of dynamic response, and modal analysis will be presented and discussed. Based on the collected data and its analysis, comparison of X and Y responses to different velocity excitation will be presented. Finally, conclusions and recommendations of novel diagnostic way will be presented.

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Multibody Dynamic Model of Web Guiding System With Moving Web

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.4001797 ◽

2010 ◽

Vol 132 (5) ◽

Cited By ~ 3

Author(s):

Lei Yu ◽

Zhihua Zhao ◽

Gexue Ren

Keyword(s):

Dynamic Model ◽

Lateral Displacement ◽

Dynamical Behavior ◽

Contact Forces ◽

Lagrangian Formulation ◽

Pi Control ◽

Control Law ◽

Reference Surface ◽

Multibody Dynamic ◽

Guiding System

In this paper, a multibody dynamic model is established to simulate the dynamics and control of moving web with its guiding system, where the term moving web is used to describe thin materials, which are manufactured and processed in a continuous, flexible strip form. In contrast with available researches based on Eulerian description and beam assumption, webs are described by Lagrangian formulation with the absolute nodal coordinate formulation (ANCF) plate element, which is based on Kirchhoff’s assumptions that material normals to the original reference surface remain straight and normal to the deformed reference surface, and the nonlinear elasticity theory that accounts for large displacement, large rotation, and large deformation. The rollers and guiding mechanism are modeled as rigid bodies. The distributed frictional contact forces between rollers and web are considered by Hertz contact model and are evaluated by Gauss quadrature. The proportional integral (PI) control law for web guiding is also embedded in the multibody model. A series of simulations on a typical web-guide system is carried out using the multibody dynamics approach for web guiding system presented in this study. System dynamical information, for example, lateral displacement, stress distribution, and driving moment for web guiding, are obtained from simulations. Parameter sensitivity analysis illustrates the effect of influence variables and effectiveness of the PI control law for lateral movement control of web that are verified under different gains. The present Lagrangian formulation of web element, i.e., ANCF element, is not only capable of describing the large movement and deformation but also easily adapted to capture the distributed contact forces between web and rollers. The dynamical behavior of the moving web can be accurately described by a small number of ANCF thin plate elements. Simulations carried out in this paper show that the present approach is an effective method to assess the design of web guiding system with easily available desktop computers.

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