Characteristics of active and passive dancers: A comparative study

Dwivedula, Ramamurthy V.; Zhu, Ye; Pagilla, Prabhakar R.

doi:10.1016/j.conengprac.2005.02.003

Cited by 40 publications

(25 citation statements)

References 5 publications

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“…2). The first is the most commonly studied in the literature, [5], [13]. Nevertheless, pendulum dancers seem to be more used than linear dancers in industrial processing plants because they are more convenient to manufacture.…”

Section: Introductionmentioning

confidence: 98%

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H<inf>∞</inf> unwinding web tension control of a strip processing plant using a pendulum dancer

Gassmann

Knittel

Pagilla

et al. 2009

2009 American Control Conference

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All flexible materials such as textiles, papers, polymers or metals are handled on rollers during their processing. Maintaining web tension in the entire processing line under changing web speed is a key factor for achieving good final product quality. Two approaches are mostly used for tension control: load cells which provide direct web tension measurement or dancers which indirectly regulate web tension via regulation of dancer position. Dancers are mobile mechanisms located in specific area of the processing line to regulate web tension. The focus of this paper is to propose an improved alternative to web processing industry practice (PI controllers) based on H∞ synthesis for pendulum dancers. Even though pendulum dancers are widely used on industrial plants, they have been studied very rarely. The nonlinear and linearized phenomenological models of the subsystem containing the dancer are first proposed. The position controller of the dancer is then synthesized using the standard H∞ framework and the mixed sensitivity approach. The performance of the proposed approach is illustrated by experimental results carried out on a large experimental web handling platform containing four driven rollers and the pendulum dancer in the unwind section. These are the first published results of successful application of an H∞ controller to a real plant containing a pendulum dancer.

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Section: Introductionmentioning

confidence: 98%

“…The use of dancers can be divided into two categories: active and passive dancers. A comparative study is proposed in [5] for web tension disturbance attenuation using a linear dancer. Active dancers are mainly used for tension disturbance attenuation requiring a tension measurement provided by a load cell, like in [13].…”

Section: Introductionmentioning

confidence: 99%

H<inf>∞</inf> unwinding web tension control of a strip processing plant using a pendulum dancer

Gassmann

Knittel

Pagilla

et al. 2009

2009 American Control Conference

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“…not new [12]- [14], we believe that this is a new application for the structure and that it can be of great interest for industrial applications. This type of mechanical structure was used to attenuate short-term tension disturbances in [12] and against periodic tension disturbances in [13] [14].…”

Section: Introductionmentioning

confidence: 99%

Desensitization to voltage sags of a rewinder by using an active dancer roll for tension control

Thiffault

Sicard

Bouscayrol³

2005

IEEE International Conference on Electric Machines and Drives, 2005.

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Continuous processes in the paper, plastics, textile and other industries, require several drives working in synchronism. Regulation of the mechanical tension in the material is a prime quality criterion. We propose strategies and a control structure that incorporate an active dancer roll in a rewinder system to improve performance of the tensioning loop to disturbances such as voltage supply fluctuations. The linear actuator is used to close a tension loop, the adjoining nip stage maintains the linear actuator close to its mid range of operation and the winder roll is velocity controlled. The effects of voltage variations on the flux observer in the variable speed drives and on loss of performance of the induction motor drives are highlighted. The results show the potential of the proposition as a retrofit option to reduce sensibility to voltage sags in winding systems with little modification to the actual controllers.

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“…Several methods suppressing this coupling in a system with two driven rolls have been studied [22]. Robust H ∞ control is a powerful tool to synthesize multivariable controllers with interesting properties of robustness and disturbance rejection.…”

Section: A Full Order Centralized H ∞ Control Design For a 3-motor Pmentioning

confidence: 99%

“…In this article, we use a 3-motor nonlinear simulation model resulting from modeling and identification of an experimental bench. The detailed description of the nonlinear model is given in [14,22]; the most important laws on which it is based will be recalled here. The model of a large scale web winding system is then deduced from the experimentally verified model.…”

Section: Introductionmentioning

confidence: 99%

Robust H¿ Fixed Order Control Strategies for Large Scale Web Winding Systems

Knittel¹,

Vedrines²,

Henrion³

et al. 2006

IEEE International Symposium on Intelligent Control

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Characteristics of active and passive dancers: A comparative study

Cited by 40 publications

References 5 publications

H<inf>∞</inf> unwinding web tension control of a strip processing plant using a pendulum dancer

H<inf>∞</inf> unwinding web tension control of a strip processing plant using a pendulum dancer

Desensitization to voltage sags of a rewinder by using an active dancer roll for tension control

Robust H¿ Fixed Order Control Strategies for Large Scale Web Winding Systems

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Characteristics of active and passive dancers: A comparative study

Cited by 40 publications

References 5 publications

H<inf>&#x221E;</inf> unwinding web tension control of a strip processing plant using a pendulum dancer

H<inf>&#x221E;</inf> unwinding web tension control of a strip processing plant using a pendulum dancer

Desensitization to voltage sags of a rewinder by using an active dancer roll for tension control

Robust H¿ Fixed Order Control Strategies for Large Scale Web Winding Systems

Contact Info

Product

Resources

About

H<inf>∞</inf> unwinding web tension control of a strip processing plant using a pendulum dancer

H<inf>∞</inf> unwinding web tension control of a strip processing plant using a pendulum dancer