Semi‐active multi‐step predictive control of structures using MR dampers

Xu, Lihua; Li, Zhongxian

doi:10.1002/eqe.822

Cited by 13 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The controls precisely organize the sequence of signals as querying dynamic response of structure, and properly adjust active or semi-active components. The electromagnetic valve of these dampers will select a correct signal to decide on the optimal switching moment of the semi-active damper according to dynamic response data (Qin et al 2008;Xu & Li 2008;Loh et al 2007). Signals with good quality are definitely of great importance to the performance of semi-active dampers.…”

Section: Introductionmentioning

confidence: 99%

A model for signal processing and predictive control of semi-active structural control system

Shih

Sung

Wang

2009

Sadhana

View full text Add to dashboard Cite

The theory for structural control has been well developed and applied to perform excellent energy dissipation using dampers. Both active and semi-active control systems may be used to decide on the optimal switch point of the damper based on the current and past structural responses to the excitation of external forces. However, numerous noises may occur when the control signals are accessed and transported thus causing a delay of the damper. Therefore, a predictive control technique that integrates an improved method of detecting the control signal based on the direction of the structural motion, and a calculator for detecting the velocity using the least-square polynomial regression is proposed in this research. Comparisons of the analytical data and experimental results show that this predictor is effective in switching the moving direction of the semi-active damper. This conclusion is further verified using the component and shaking table test with constant amplitude but various frequencies, and the El Centro earthquake test. All tests confirm that this predictive control technique is effective to alleviate the time delay problem of semi-active dampers. This predictive control technique promotes about 30% to 40% reduction of the structural displacement response and about 35% to 45% reduction of the structural acceleration response.

show abstract

Section: Introductionmentioning

confidence: 99%

A model for signal processing and predictive control of semi-active structural control system

Shih

Sung

Wang

2009

Sadhana

View full text Add to dashboard Cite

show abstract

“…The time-delay causes the mode amplitude to increase, and the hardening performance of the MR damper is more obvious. Other scholars have also studied the response time of MR damper (Zheng et al, 2015) (Xu and Li, 2008). These studies provide a basis for solving the problem of rapid response of MR damper.…”

Section: Introductionmentioning

confidence: 99%

Vibration control of MR whole-spacecraft under medium–high frequency and small amplitude considering actuator time-delay

Deng

Pan²,

Xing³

et al. 2023

Journal of Vibration and Control

View full text Add to dashboard Cite

The satellite bears complex vibration loads transmitted from the satellite-rocket interface during launch, where medium–high frequency and small amplitude vibration is highly likely to harm the satellite’s internal precision instruments. Under such special conditions, the time-delay factor of the MR damper as the actuator cannot be ignored in the vibration control of the magnetorheological (MR) whole-spacecraft. To compensate actuator time-delay, and consider the system’s nonlinear characteristics under medium–high frequency and small amplitude conditions, a gray prediction time-delay compensation method is proposed based on the human-simulated intelligent controller (HSIC). After verifying through simulation and experiment that actuator time-delay affects the vibration response of the MR whole-spacecraft, the HSIC based on gray prediction is designed. Then, the control effect of HSIC with or without time-delay is simulated numerically. The results reveal that after considering the time-delay factor, the resonance peak increases by 17%, and the transmissibility of the concerned particularly frequency band (40 Hz) increases by 62%, which implies a significant deterioration in the control effect. Following, to make up for the response deterioration caused by the time-delay, the HSIC based on gray prediction is used for numerical simulation. The results confirm that reasonable time-delay compensation can effectively improve the system dynamics. This study provides a reference for the practical application of the whole-spacecraft controller.

show abstract

“…These hydraulic dampers can simultaneously reduce the structural displacement and acceleration reaction to provide effective result depending on the requirement of the structure; they have less problem of life cycle as well. Many devices, such as the Taylor device (Lee and Taylor 2001), Electrorheological damper (Xu et al 2000;Su et al 2003;Kim et al 2002;Shulman et al 2006;Wereley 2008;Song et al 2002) and Magnetroheologrical damper (Dyke et al 1998;Pranoto et al 2004;Wang and Meng 2005;Xu and Li 2008;Loh et al 2007), semi-active hydraulic damper developed by Kobori (Kurata et al 1999;Kobori et al 1999) and Sung (Shih et al 2002, 2003;Shih and Sung 2004;2006) are currently available. These dampers basically function by shifting the size of the orifice to promptly adjust the shear stress of oil or by using specific valves to produce the proper hydraulic effect (Shih et al 2002(Shih et al , 2003Sung 2004, 2006).…”

Section: Introductionmentioning

confidence: 99%

Energy Dissipation Behaviours and Seismic Reduction Performance of a Proposed Velocity and Displacement Dependent Hydraulic Damper (Vdhd)

Sung

Shih

Zhao

2010

Journal of Civil Engineering and Management

View full text Add to dashboard Cite

Abstract.A new oil-pressure Velocity and Displacement Dependent Hydraulic Damper (VDHD) is proposed by adding an additional Relief Valve parallel to the Throttle Valve with a different aperture size. This objective is to obtain an adaptive control by changing the damping coefficient of the VDHD for better control of structural movement during earthquake. In order to simulate its actual energy elimination, a mathematical analysis model is developed based on the Maxwell Model, which is modified by adding a serial friction model and a small damper parallel to the friction model in this study. The mathematical simulated results are compared with the actual energy-dissipating behaviours of this proposed damper. The comparison shows that this proposed mathematical modelling could accurately simulate the relation of force and displacement as well as the relation of force and velocity during the process of energy dissipation. In addition, results of both the laboratory shaking table test and simulation analyses are used to test and verify the seismic reduction performance of this proposed damper. The experimental and simulation results show that in spite of the magnitude of the earthquake, the proposed VDHD device has a superior effect on the control of structural displacement by achieving effective acceleration reduction.

show abstract

Semi‐active multi‐step predictive control of structures using MR dampers

Cited by 13 publications

References 13 publications

A model for signal processing and predictive control of semi-active structural control system

A model for signal processing and predictive control of semi-active structural control system

Vibration control of MR whole-spacecraft under medium–high frequency and small amplitude considering actuator time-delay

Energy Dissipation Behaviours and Seismic Reduction Performance of a Proposed Velocity and Displacement Dependent Hydraulic Damper (Vdhd)

Contact Info

Product

Resources

About