Amin Maghareh

Amin Maghareh
Purdue University | Purdue · School of Mechanical Engineering

PhD

About

45
Publications
8,800
Reads
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420
Citations
Additional affiliations
October 2019 - August 2020
Purdue University
Position
  • Professor (Assistant)
August 2017 - August 2018
Purdue University
Position
  • PhD Student
July 2017 - August 2018
Purdue University
Position
  • PhD Student

Publications

Publications (45)
Article
Hydraulic actuators play a key role in experimental structural dynamics. In a previous study, a physics-based model for a servo-hydraulic actuator coupled with a nonlinear physical system was developed. Later, this dynamical model was transformed into controllable canonical form for position tracking control purposes. For this study, a nonlinear de...
Article
Real-time hybrid simulation (RTHS) is an effective and versatile tool for the examination of complex structural systems with rate dependent behaviors. To meet the objectives of such a test, appropriate consideration must be given to the partitioning of the system into physical and computational portions (i.e., the configuration of the RTHS). Predic...
Article
Real-time hybrid simulation (RTHS) is a promising cyber-physical technique used in the experimental evaluation of civil infrastructure systems subject to dynamic loading. In RTHS, the response of a structural system is simulated by partitioning it into physical and numerical substructures, and coupling at the interface is achieved by enforcing equi...
Article
Real-time hybrid simulation (RTHS) is increasingly being recognized as a powerful cyber-physical technique that offers the opportunity for system evaluation of civil structures subject to extreme dynamic loading. Advances in this field are enabling researchers to evaluate new structural components/systems in cost-effective and efficient ways, under...
Article
Hydraulic actuators have been widely used to experimentally examine structural behavior at multiple scales. Real-time hybrid simulation (RTHS) is one innovative testing method that largely relies on such servo-hydraulic actuators. In RTHS, interface conditions must be enforced in real time, and controllers are often used to achieve tracking of the...
Conference Paper
Full-text available
Due to their unpredictable nature, many impact events (e.g., overheight vehicles striking on low-clearance bridges) go unnoticed or get reported hours or days later. However, they can induce structural damage or even failure. Therefore, prompt impact detection and localization strategies are essential for early warning of impact events and rapi...
Poster
Full-text available
The fault analysis of pressurized systems like oil/gas pipelines and international space station is an important research area. Atmospheric air leakage in deep space habitats can be more challenging, requiring proper investigations. The cause of such gradual air loss can be due to many factors, like meteorite impacts, seal deterioration, and crack...
Article
Real‐time hybrid simulation (RTHS) is intended to serve as a technique able to conduct experiments when the behavior of the plant is not well understood, i.e., when deep uncertainties are present in the physical specimen. By combining strategies from robust control and adaptive control, this paper develops an adaptive sliding mode control (ASMC) sy...
Article
Experiments involving soil-structure interaction are often constrained by the capacity and other limitations of the shake table. Additionally, it is usually necessary to consider different types of soil in experiments. Real-time hybrid simulation (RTHS) offers an alternative method to conduct such tests. RTHS is a cyber-physical testing technique t...
Article
This paper presents a real-time hybrid simulation (RTHS) strategy where the numerical and experimental substructures are executed at two different rates to optimize computational resources while maintaining an effective actuator control. The concept is referred to here as multi-rate real-time hybrid simulation (mrRTHS), and this approach is intende...
Chapter
The objective of this chapter is to follow up on a previous investigation of a nonlinear energy sink, based upon the concept of a cantilevered beam, whose lateral vibrations are bounded by two rigid surfaces with a carefully selected curvature. This device is tested on a linear host structure, and its application as a seismic attenuator device is e...
Conference Paper
The objective of this study is to follow up on a previous investigation of a nonlinear energy sink, based upon the concept of a cantilevered beam, whose lateral vibrations are bounded by two rigid surfaces with a carefully selected curvature. This device is tested on a linear host structure and its application as a seismic attenuator device is expe...
Article
Real-time hybrid simulation (RTHS) is a novel cyber-physical testing technique for investigating especially large or complicated structural systems. Controllers are required to compensate for the dynamics of transfer systems that emulate the interactions between the physical and numerical substructures. Thus, both the stability and accuracy of RTHS...
Article
Full-text available
Currently, the lack of (1) a sufficiently integrated, adaptive, and reflective framework to ensure the safety, integrity, and coordinated evolution of a real-time hybrid simulation (RTHS) as it runs, and (2) the ability to articulate and gauge suitable measures of the performance and integrity of an experiment, both as it runs and post hoc, have pr...
Article
Full-text available
The objective of this study is to develop, simulate and verify experimentally a model of a nonlinear spring, based on the principle of a cantilevered beam with a mass on its tip, and whose overall lateral vibration is constrained by a specially shaped rigid boundary. The focus here is the use of this spring for vibration reduction applications. The...
Article
Control is a critical element in many applications and research such as experimental testing in real-time. Linear approaches for control and estimation have been widely applied to real-time hybrid simulation (RTHS) techniques in tracking the physical domain (plant). However, nonlinearities and highly uncertainties of the plant impose challenges tha...
Article
In a real-time hybrid simulation, a transfer system is used to enforce the interface interaction between computational and physical substructures. A model-based, multi-layer nonlinear control system is developed to accommodate extensive performance variations and uncertainties in a physical substructure. The aim of this work is to extend the applic...
Preprint
Full-text available
Kalman filtering has been traditionally applied in three application areas of estimation, state estimation, parameter estimation (a.k.a. model updating), and dual estimation. However, Kalman filter is often not sufficient when experimenting with highly uncertain nonlinear dynamic systems. In this study, a nonlinear estimator is developed by adoptin...
Article
This paper presents the problem definition and guidelines for a benchmark control problem in real-time hybrid simulation for a seismically excited building, to appear in a Special Issue of Mechanical Systems and Signal Processing. Benchmark problems have been especially useful in enabling a community of researchers to leap forward on a given topic,...
Article
Full-text available
Future permanent habitats on the Moon may facilitate space exploration by serving as an outpost for manned missions to other planets. Safety and resilience of those habitats are the main concerns, especially given the existing dangerous conditions and hazards such as temperature fluctuation, radiation, seismic activity, and meteorite impacts. Under...
Article
The objective of this study is to develop a novel methodology to assess the energy flow between a nonlinear energy sink (NES) and the primary system it is attached to in terms of energy orientation, which is directly related to the sign of the power present on the primary system. To extend the work done in previous studies, which have focused prima...
Conference Paper
Full-text available
Nuevas Tecnologías Aplicadas a la Ingeniería Sísmica Resumen Las simulaciones híbridas en tiempo real son reconocidas como una alternativa poderosa para realizar ensayos estructurales en el laboratorio. A diferencia de las pruebas pseudo-dinámicas, en este método el ensayo se ejecuta en tiempo real permitiendo el estudio de componentes que dependen...
Article
Full-text available
One of the next major steps in space exploration, as noted by agencies such as NASA and SpaceX, is the creation of extraterrestrial habitats. Most current extraterrestrial habitat designs focus on above-surface solutions and do not consider all the hazards that can impact this habitat. However, the existence of lava tubes on the moon, supported by...
Article
Full-text available
Developing a resilient extra-terrestrial habitat with regards to long-term reliability and safety from hazards including radiation, meteorites, and quakes is necessary to ensure human survival during interplanetary exploration. The objective of this study is to examine conventional aerospace safety and reliability analysis techniques to investigate...
Article
The multi-time-step method of time integration for problems in structural dynamics allows one to decompose the problem domain into small subdomains and use different time steps within each subdomain to reduce the computational cost of solving such problems. However, the number of possible decompositions and their associated time steps for a given m...
Article
Real-time hybrid simulation (RTHS) is a powerful cyber-physical technique that is a relatively cost-effective method to perform global/local system evaluation of structural systems. A major factor that determines the ability of an RTHS to represent true system-level behavior is the fidelity of the numerical substructure. While the use of higher-ord...
Article
Full-text available
Hybrid simulation is increasingly being recognized as a powerful technique for laboratory testing. It offers the opportunity for global system evaluation of civil infrastructure systems subject to extreme dynamic loading, often with a significant reduction in time and cost. In this approach, a reference structure/system is partitioned into two or m...
Technical Report
Full-text available
Hybrid simulation is increasingly being recognized as a powerful emerging technique for laboratory testing. It offers the opportunity for global system evaluation of civil infrastructure systems subject to extreme dynamic loading, typically with a significant reduction in time and cost. In this approach, a reference structure/system is partitioned...
Conference Paper
Full-text available
Real-time hybrid simulation (RTHS) is an important tool in the design and testing of civil and mechanical structures when engineers and scientists wish to understand the performance of an isolated component within the context of a larger structure. Performing full-scale physical experimentation with a large structure can be prohibitively expensive....
Article
In a typical Real-time Hybrid Simulation (RTHS) setup, servo-hydraulic actuators serve as interfaces between the computational and physical substructures. Time delay introduced by actuator dynamics and complex interaction between the actuators and the specimen has detrimental effects on the stability and accuracy of RTHS. Therefore, a good understa...
Article
Integrated networking, information processing, sensing and actuation capabilities have allowed structural engineers to extend the existing evaluation methods of civil infrastructures to a new level. Evolved from pseudo-dynamic testing (PSD), real-time hybrid simulation (RTHS) is a promising cyber-physical technique used in the experimental evaluati...
Conference Paper
Full-text available
Real time hybrid simulation (RTHS) is a promising cyber-physical method for the experimental evaluation of civil engineering structures. RTHS allows for simulation of highly complicated civil engineering structures by partitioning them into numerical and physical (experimental) substructures, reducing the costs and time associated with a single tes...
Conference Paper
Full-text available
A promising method for the experimental evaluation of civil engineering structures is found in real time hybrid simulation (RTHS). In this approach numerical and physical substructures (from a single structure) must be integrated with high fidelity at run-time. This approach allows for simulation of highly complicated civil structures by dividing t...

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Projects

Projects (2)
Project
Identifying the science and engineering needs in order to achieve long-term resilient habitat systems on the Moon and Mars
Project
Step-by-step guide to conduct simple RTHS tests Proof of concept problem for the community to solve and test Modular and versatile framework for RTHS studies