[1] In the San Luis Valley (SLV), Colorado legislation passed in 2004 requires that hydraulic head levels in the confined aquifer system stay within the range experienced in the years 1978–2000. While some measurements of hydraulic head exist, greater spatial and temporal sampling would be very valuable in understanding the behavior of the system. Interferometric synthetic aperture radar (InSAR...

The hydraulic human power amplifier is a tool that uses hydraulic actuation to amplify the force that the human exerts on it. Our control objective and framework are to make the system behave like a passive mechanical tool when interacting with the human and with the work environment with a specified power scaling factor. A virtual velocity coordination control approach casts the human power am...

1. Abstract Near real-time continuous monitoring systems have been proposed as a promising approach for helping drinking water utilities detect and respond quickly to threats related to the normal operation of the water network. Water quality sensors may detect contamination events that pose a growing threat to public health, while pressure and flow sensors are used for estimating the hydraulic...

In this study, the control performance of a hydraulic servo system with a feedback linearization compensator is investigated. The focus of this study is set on the quantitative investigation of the effects(sensitivities) of disturbances and system parameters’ variation on control performances of the hydraulic control system. Finally, verifies the efficacy of a disturbance observer to overcome t...

This article describes a solution to create a hardwarein-the-loop (HIL) simulation system of civil aircraft thrust reverser with Modelica-based simulation platform -MWorks in Windows system. The HIL system uses simulation platform “MWorks” to model and simulate the thrust reverser hydraulic system, and takes hardware -PLC’s output signals as the inputs of the simulation. Modeling module, commun...

Presented herein is a methodology for the seismic and hydraulic assessment of the re-liability of urban water distribution networks (UWDN) based on general seismic assessment standards, as per the American Lifelines Alliance (ALA) guidelines, localized historical records of critical risk-of-failure metrics pertaining to the specific UWDN under assessment, and hydraulic simulations using adapted...

The task of setting a hydraulic system into operation constitutes some kind of configuration problem. To be more specific, this task is comprised of several configuration checking problems placed at different levels of abstraction. Configuration technology as developed in the past is only partly capable to cope with these checking problems. The reason for this is that the checking of a hydrauli...

In this paper, the principle of electro-hydraulic proportional control system are introduced, electro-hydraulic velocity control system are designed and can realize volevity control with high accuracy. In the system, relative amplitude abundant degree and phasic abundant degree and corresponding frequency of passing of Body system is easily obtained under different open ring gain of K, thus it ...

the constitutive relationships of the rubber materials that act as the main spring of a hydraulic engine mount are nonlinear. in addition to material induced nonlinearity, further nonlinearities may be introduced by mount geometry, turbulent fluid behavior, temperature, boundary conditions, decoupler action, and hysteretic behavior. in this research all influence the behavior of the system only...

This thesis examines the modelling and control of a hydraulic servo system. Both a theoratical and a practical approach are discussed. The used set-up consists of an one DOF hydraulic system with an electronically controlled servo valve. A nonlinear parametric model of the system, several fitted linear black box models as well as a LPV model combining these fits are determined. The models are v...