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Technical Brief

A Novel Nonlinear Modeling and Dynamic Analysis of Solenoid Actuated Butterfly Valves Coupled in Series

[+] Author and Article Information
Peiman Naseradinmousavi

Assistant Professor
Department of Mechanical Engineering,
San Diego State University (SDSU),
San Diego, CA 92115
e-mail: peiman.naseradinmousavi@villanova.edu

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received September 19, 2013; final manuscript received June 25, 2014; published online August 28, 2014. Assoc. Editor: Yang Shi.

J. Dyn. Sys., Meas., Control 137(1), 014505 (Aug 28, 2014) (5 pages) Paper No: DS-13-1359; doi: 10.1115/1.4027990 History: Received September 19, 2013; Revised June 25, 2014

In this paper, we focus on a novel nonlinear modeling and dynamic analysis of the actuated butterfly valves coupled in series. The actuated valves used in the chilled water systems of the U.S. Navy and commercial ships, namely, “smart valves,” recently have received much attention when many of them are operating in a complex network. The network regulates the pressure of the pipeline, while several nonlinear torques/forces including the hydrodynamic and bearing torques and the magnetomotive force affect the performance of each set individually and subsequently the whole system via the couplings among the valves. The contribution of this work is to model such couplings in the presence of the nonlinearities and an applied periodic noise and then carry out dynamic analysis of the valves. We examine the model developed with/without actuation by applying a periodic noise on the upstream valve to capture the couplings among the parameters of both the actuators and valves. This would help us predict the behavior of a particular valve in the network subject to motions of other valves.

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Figures

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Fig. 1

(a) Two actuated butterfly valves in series. (b) A model of two valves in series without actuation.

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Fig. 2

The experimental work for a set of the actuated butterfly valve

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Fig. 3

(a) The actuated valves' motions versus time. (b) The actuated valves' angular velocities versus time.

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Fig. 4

The valves' power spectra

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Fig. 5

(a) The rates of currents for the noise applied on the upstream valve. (b) The magnetic forces for the noise applied on the upstream valve.

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Fig. 6

The unactuated valves' motions versus time

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Fig. 7

(a) The experimental pressure drop revealing a sharp jump for α > 60 deg; a set of the valve/actuator. (b) The experimental total torque for a set of the valve/actuator.

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