Recent Advances in Computational Methodologies for Real-Time Hybrid Simulation of Engineering Structures

Palacio-Betancur, Alejandro; Soto, Mariantonieta Gutierrez

doi:10.1007/s11831-022-09848-y

Cited by 16 publications

(6 citation statements)

References 113 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, a single PID controller may not be feasible for all the possible subslider-crank mechanisms inside a system with a large number of elements, therefore, new control strategies would need to be studied such as gain scheduling and adaptive controllers. 29 In general, the physical prototypes for the proposed reconfigurable system at the current stage cannot be classified as energy-efficient due to the need for holding power during locking. Future work includes modification of the proposed mechanisms that will have two stable states.…”

Section: Discussionmentioning

confidence: 99%

Robust control of friction-driven reconfigurable adaptive structures

Palacio-Betancur,

Rácz,

Maghsoudlourad

et al. 2024

Behavior and Mechanics of Multifunctional Materials XVIII

View full text Add to dashboard Cite

Traditional design methods for engineering applications aim to achieve optimal performance for specific conditions or moderate performance for a broader range of conditions. However, the optimal performance for a wide spectrum of situations can be facilitated if such systems possess reconfiguration capability. It can be illustrated in the example of structures with steerable joints, which is a popular approach in robotics. By rotating the joints to a different degree, a plethora of resulting configurations can be achieved -configurations that might be specifically suited for the required conditions. Systems based on these principles can be implemented on the macroscopic level in adaptive facades, on the mesoscopic level in mechanical metamechanisms, and at the microscopic level in microelectromechanical devices. In general, adaptive structures often require numerous actuators to facilitate a wide range of reachable configurations, leading to increasing energy demands as the system size increases. This can be seen in the case of robotics when each joint can be independently actively rotated to drive the motion corresponding to the specific degree of freedom. This paper analyzes an alternative situation, when the joins are semi-active and can exist only in either a locked or unlocked state, with only one (last joint) being actively steered. In the ideal case, the energy should be consumed only for switching between states, while maintaining the state should be free with locking achieved via switchable friction. While theoretically improving energy efficiency, such a system makes it much more challenging to control the resulting shape of the structure as compared with its counterpart with actively rotating joints. In this paper, we develop a motion planning algorithm to facilitate the achievement of the desired shape via control over the state of the joints and the position of the last link. In particular, the change of shape is performed by a sequence of singledegree-of-freedom motions determined by a motion planning algorithm based on Rapidly exploring Random Trees and sub-slider-crank systems (RRT-SC). One application of the proposed method is evaluated for reconfigurable building facades and paves the way for the next generation of structures in smart cities.

show abstract

Section: Discussionmentioning

confidence: 99%

Robust control of friction-driven reconfigurable adaptive structures

Palacio-Betancur,

Rácz,

Maghsoudlourad

et al. 2024

Behavior and Mechanics of Multifunctional Materials XVIII

View full text Add to dashboard Cite

show abstract

“…However, with the advancement in science, the HS led to the introduction of pseudo-dynamic testing, which is also known as RTHS nowadays. There are various applications of real-time hybrid simulation in different fields of civil and structural engineering which include but are not limited to geotechnical Real-Time Hybrid Simulations (gRTHS), Real-Time Hybrid Simulation of Ocean Structures (RTHSO) and Real-Time Hybrid Optimisation (RTHO) [40]. The numerical substructure is modelled and the calculations from the physical substructure are fed back to the numerical model to calculate the associated motions which form the inner loop.…”

Section: Real-time Hybrid Simulationmentioning

confidence: 99%

Experimental Evaluation of Post-Earthquake Fire on Reinforced Concrete Structures—A Review

Khiali

Rodrigues

2023

CivilEng

View full text Add to dashboard Cite

This review aims to investigate the recent advancements in the performance of earthquake-damaged reinforced concrete structures subjected to fire loading and the damages that are induced by fire to reinforced concrete structural elements with damage due to seismic loads. The first part of the paper provides a general understanding of the Post-Earthquake Fire (PEF) effect on reinforced concrete structures, and some statistics regarding the previous earthquake casualties and amounts of destruction in different regions of the world are addressed. In the second part of the investigation, an in-depth review of the experimental and numerical procedures of PEF analysis in concrete columns, beams, slabs, and full-scale RC frames and the types of damages in RC members due to PEF have been presented, giving a general review of the results and conclusions in previous research in PEF in different reinforced concrete structures. In the end is discussed the concept of hybrid fire simulation, its applications in engineering problems, the methodologies that consider full interaction effects as well as recent breakthroughs in studying PEF using Real-Time Hybrid Simulation.

show abstract

“…With over 2 decades of dedicated research focusing on integration algorithms, delay compensation, and evaluation methods, RTHS has emerged as an effective and efficient technique for performance evaluation of systems under earthquakes. Its capability to facilitate real-time, large-scale testing has significantly contributed to the evaluation and validation of technologies for seismic hazard mitigation, marking a pivotal milestone in the field of earthquake engineering (Nakashima et al, 1992;Ou et al, 2015;Tian et al, 2020;Li et al, 2022;Palacio-Betancur and Soto, 2023).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of data-driven NARX model based compensation for multi-axial real-time hybrid simulation benchmark study

Xu,

Meng,

Chen

et al. 2024

Front. Built Environ.

View full text Add to dashboard Cite

Actuator control takes a pivotal role in achieving stability and accuracy, particularly in the context of multi-axial real-time hybrid simulation (maRTHS). In maRTHS, multiple hydraulic actuators are necessitated to apply precise motions to experimental substructures thus necessitating the application of multiple-input multiple-output (MIMO)control strategies. This study evaluates the data-driven nonlinear autoregressive with external input (NARX) based compensation for the servo-hydraulic dynamics within the maRTHS benchmark model. Different from previous study, nonlinear terms are incorporated into the NARX model. Online least square and ridge regression techniques are utilized to estimate the model coefficients to achieve optimal compensation. The influence of various model order and window length is assessed for the NARX model-based compensation. The findings of this research demonstrate that NARX-based compensation has significant potential not only in facilitating precise actuator control for maRTHS but also in enabling robust control in the presence of unknown uncertainties inherent to the servo-hydraulic system.

show abstract

Recent Advances in Computational Methodologies for Real-Time Hybrid Simulation of Engineering Structures

Cited by 16 publications

References 113 publications

Robust control of friction-driven reconfigurable adaptive structures

Robust control of friction-driven reconfigurable adaptive structures

Experimental Evaluation of Post-Earthquake Fire on Reinforced Concrete Structures—A Review

Evaluation of data-driven NARX model based compensation for multi-axial real-time hybrid simulation benchmark study

Contact Info

Product

Resources

About