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Proceedings ArticleDOI

Cyber-physical systems for real-time hybrid structural testing: a case study

TLDR
Experimental results obtained through this case study give evidence of the feasibility and efficacy of these steps towards the overall goal: to develop a Cyber-physical Instrument for Real-time hybrid Structural Testing (CIRST).
Abstract
Real-time hybrid testing of civil structures, in which computational models and physical components must be integrated with high fidelity at run-time, represents a grand challenge in the emerging area of cyber-physical systems. Actuator dynamics, complex interactions among computers and physical components, and computation and communication delays all must be managed carefully to achieve accurate tests.In this paper we present a case study of several fundamental interlocking challenges in developing and evaluating cyber-physical systems for real-time hybrid structural testing: (1) how physical and simulated components can be integrated flexibly and efficiently within a common reusable middleware architecture; (2) how predictable timing can be achieved atop commonly available hardware and software platforms; and (3) how physical vs. simulated versions of different components within a system can be interchanged with high fidelity between comparable configurations. Experimental results obtained through this case study give evidence of the feasibility and efficacy of these steps towards our overall goal: to develop a Cyber-physical Instrument for Real-time hybrid Structural Testing (CIRST).

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Citations
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Intelligent Manufacturing in the Context of Industry 4.0: A Review

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Design Techniques and Applications of Cyberphysical Systems: A Survey

TL;DR: The aim of this survey is to enable researchers and system designers to get insights into the working and applications of CPSs and motivate them to propose novel solutions for making wide-scale adoption of CPS a tangible reality.
Proceedings ArticleDOI

Multi-core Real-Time Scheduling for Generalized Parallel Task Models

TL;DR: A new task decomposition method is proposed that decomposes each parallel task into a set of sequential tasks and achieves a resource augmentation bound of 2.62 when the decomposed tasks are scheduled using global EDF and partitioned deadline monotonic scheduling, respectively.
Journal ArticleDOI

Multi-core real-time scheduling for generalized parallel task models

TL;DR: A new task decomposition method is proposed that decomposes each parallel task into a set of sequential tasks and achieves a resource augmentation bound of 4 and 5 when the decomposed tasks are scheduled using global EDF and partitioned deadline monotonic scheduling, respectively.
Proceedings ArticleDOI

Analysis of Federated and Global Scheduling for Parallel Real-Time Tasks

TL;DR: The federated scheduling algorithm proposed in this paper is a generalization of partitioned scheduling to parallel tasks and shows that if on unit-speed cores, a task set has total utilization of at most m and the critical-path length of each task is smaller than its deadline, then Federated scheduling can schedule that task set.
References
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Journal ArticleDOI

Pseudodynamic Method for Seismic Testing

TL;DR: The pseudodynamic method as discussed by the authors is a relatively new experimental technique for evaluating the seismic performance of structural models in a laboratory by means of on-line computer controlled testing, during such a test, the displacement response of a structure to a specified dynamic excitation is numerically computed and quasi-statically imposed on the structure, based on analytically prescribed inertia and viscous damping characteristics for the structure and the experimentally measured structural restoring forces.

ASX: an object-oriented framework for developing distributed applications

TL;DR: The structure and functionality of the ASX framework's object-oriented architecture is described and the results of performance experiments conducted using ASX-based implementations of connection-oriented and connectionless protocols from the TCP/IP protocol family are presented.

Model-Based Strategies for Real-Time Hybrid Testing

Juan Carrion
TL;DR: In this paper, the authors proposed a real-time hybrid testing approach to evaluate the response of structures incorporating devices for passive and semi-active structural control with high performance hydraulic components.
Journal ArticleDOI

Compensation of actuator delay and dynamics for real-time hybrid structural simulation

TL;DR: In this paper, a simple approach is introduced for rapid online estimation of system delay and actuator command gain, thus capturing the variability of system response through a simulation, and an extrapolation procedure for delay compensation, based on the same kinematics equations used in numerical integration procedures is examined.
Journal Article

Pseudodynamic Test Method-Current Status and Future Direction

TL;DR: In this article, the authors present a pseudodynamic test method that combines the simplicity of quasistatic testing with the realism of shaking table tests for seismic performance testing, where the loading conditions imposed on a test specimen are representative of those that might occur during an actual earthquake.
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