A mixed approach for the control of a testing equipment employed for earthquake isolation systems

Pagano, Stefano; Russo, Michele; Strano, Salvatore; Terzo, Mario

doi:10.1177/0954406213484424

Cited by 19 publications

(19 citation statements)

References 21 publications

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“…A variability is considered for all the parameters of the hydraulic actuator, including the geometric parameters and the supply pressure. The nominal values have been derived by means of an identification procedure based on minimization of the least square error between experimental data and the simulated ones . They are set as follows:

\begin{matrix} left \\ \overset{true^}{m} = 540 kg, \overset{true^}{σ} = 22500 \frac{Ns}{normalm}, {\overset{F}{true}}_{C} = 950 N, \overset{true^}{μ} = 0.03, \overset{true^}{N} = 67000 N, {\overset{A}{true}}_{p} = 0.0055 {normalm}^{2}, {\overset{V}{true}}_{0} = 0.0035 {normalm}^{3}, \\ \overset{true^}{β} = 0.75 e 9 Pa, {\overset{K}{true}}_{Q} = 2.1082 e - 7 \frac{m^{3}}{{sVPa}^{\frac{1}{2}}}, {\overset{u}{true}}^{+} = 0.65 V, {\overset{u}{true}}^{-} = - 0.65 V, {\overset{P}{true}}_{S} = 110 e 5 Pa . \end{matrix}

…”

Section: Simulation and Experimental Resultsmentioning

confidence: 99%

Section: Simulation and Experimental Resultsmentioning

confidence: 99%

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A multi-purpose seismic test rig control via a sliding mode approach

Strano

Terzo

2014

Struct. Control Health Monit.

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SUMMARY The paper describes an experimental and theoretical research activity based on a versatile seismic test rig employed to characterize seismic isolators or structures. The system is hydraulically actuated and exhibits a high nonlinear behaviour because of the presence of the dead band and frictions. The double functionality of the test rig is based on two possible configurations concerning the hydraulic actuation system, which cause an induced variability in the parameters; moreover, the seismic isolators and the test structures are characterized by properties that are a priori unknown. Because of the several operating conditions, the test rig is affected by structured and unstructured uncertainties that require a robust approach for the control of the position. Starting from a nonlinear dynamic model, a sliding control is derived taking into account the dead band and a large variability of the hydraulic and geometric parameters. The simulations and the experimental results confirm the effectiveness, in terms of stability and tracking error, of the proposed control for the different configurations of the plant. Copyright © 2014 John Wiley & Sons, Ltd.

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\begin{matrix} left \\ \overset{true^}{m} = 540 kg, \overset{true^}{σ} = 22500 \frac{Ns}{normalm}, {\overset{F}{true}}_{C} = 950 N, \overset{true^}{μ} = 0.03, \overset{true^}{N} = 67000 N, {\overset{A}{true}}_{p} = 0.0055 {normalm}^{2}, {\overset{V}{true}}_{0} = 0.0035 {normalm}^{3}, \\ \overset{true^}{β} = 0.75 e 9 Pa, {\overset{K}{true}}_{Q} = 2.1082 e - 7 \frac{m^{3}}{{sVPa}^{\frac{1}{2}}}, {\overset{u}{true}}^{+} = 0.65 V, {\overset{u}{true}}^{-} = - 0.65 V, {\overset{P}{true}}_{S} = 110 e 5 Pa . \end{matrix}

…”

Section: Simulation and Experimental Resultsmentioning

confidence: 99%

Section: Simulation and Experimental Resultsmentioning

confidence: 99%

A multi-purpose seismic test rig control via a sliding mode approach

Strano

Terzo

2014

Struct. Control Health Monit.

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“…2), available at the Department of Industrial Engineering of the University of Naples Federico II (Italy), consisting of a horizontal hydraulic actuator, powered by a 75 kW AC electric motor, which allows to impose both load or displacement histories. The maximum horizontal force is 50 kN, the maximum speed is 2.2 m/s, the maximum stroke is ± 0.2 m. A hydraulic jack allows to apply a vertical load up to 190 kN during the tests [11]. show the symmetric force-displacement hysteresis loops obtained in Roll and Shear directions at small, relatively large, and large displacements, respectively.…”

Section: Introductionmentioning

confidence: 92%

A Parallel Model for Predicting the Horizontal Dynamic Behavior of Helical Wire Rope Isolators

Serino¹,

Spizzuoco²,

Vaiana³

2016

Fourth International Conference on Advances in Civil, Structural and Environmental Engineering - ACSEE 2016

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“…8). The plant is typically employed for seismic testing [32] and its actuation system is constituted by a double-ended hydraulic cylinder (Fig. 9), an axial piston pump, powered by a 75 kW AC electric motor, a pressure relief valve and a four way-three position proportional valve.…”

Section: The Experimental Test Benchmentioning

confidence: 99%