Decoupling control law for structural control implementation

Control algorithms for semi-active structural control system found in the scientific literature often rely on the choice of several parameters included in the control law. The present paper shows the preliminary conclusions of a study aiming to explain the weak dependency of the response reduction associated to semi-active control systems on the particular choice of the control algorithm adopted, provided that the relevant parameters of any control law be properly tuned.

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Optimal structure control for earthquake resistance

Journal of Micromechanics and Molecular Physics ◽

10.1142/s2424913021420029 ◽

2021 ◽

pp. 1-7

Author(s):

Xianyang Yang ◽

James D. Lee

Keyword(s):

Optimal Control ◽

Structural Control ◽

Algorithm Design ◽

Computer Software ◽

Earthquake Resistance ◽

Control Law ◽

State Variables ◽

Optimal Control Strategy ◽

Earthquake Excitation ◽

History Of

This work developed the optimal and active control algorithms applicable to structural control for earthquake resistance. [Lewis, F. L., Vrabie, D. and Syrmos, V. L. [2012] Optimal Control (John Wiley & Sons)] developed a rigorous and comprehensive procedure for the derivation of an optimal control strategy based on the calculus of variation. This work is an application of Lewis’ formulation to the control of a structure for earthquake resistance. We developed a computer software which can be used to generate a dynamic model to simulate a planar structure and to construct the control law. This model also includes the tendon driven actuators, sensors and true history of earthquake excitation. The control law has two parts: (I) the feedback control which depends on the estimate state variables (Kalman filter) and (II) the record of the realistic earthquake excitation. The optimal control problem eventually leads to a two-point boundary value problem whose solution hinges on the knowledge of the entire history of the earthquake excitation. We employ true records of earthquake excitation as input. This approach enables one to solve the Riccati equations rigorously. Then, from the simulation results, one may study the relations between the control algorithm design and the characteristics (frequency, amplitude and duration) of earthquake excitation.

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NiTi-wire Shape Memory Alloy Dampers to Simultaneously Damp Tension, Compression, and Torsion

Journal of Vibration and Control ◽

10.1177/1077546305055773 ◽

2005 ◽

Vol 11 (8) ◽

pp. 1067-1084 ◽

Cited By ~ 11

Author(s):

Yu-Lin Han ◽

De-Jin Xing ◽

Er-Tian Xiao ◽

Ai-Qun Li

Keyword(s):

Shape Memory Alloy ◽

Shape Memory ◽

Structural Control ◽

Restoring Force ◽

Niti Wire ◽

Niti Sma ◽

Mechanics Analysis ◽

Different Diameters ◽

Reduced Scale ◽

Control Implementation

NiTi-wire shape memory alloy (SMA) dampers, which utilize NiTi SMA wires to simultaneously damp tension, compression, and torsion, have been developed for structural control implementation in this study. First, three reduced-scale NiTi-wire SMA dampers were constructed. Then, mechanics analysis of the NiTi-wire SMA dampers was performed, based on a model of the SMA-wire restoring force and on tension, compression, and torsion damping analysis. Finally, tension, compression, and torsion experiments were carried out, using the three reduced-scale NiTi-wire SMA dampers of different diameters. The experimental results revealed that all of the three reduced-scale NiTi-wire SMA dampers had the ability to simultaneously supply tension damping, compression damping, and torsion damping, and the results were found to be similar to the damping analytical results.

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Semi-active control devices in structural control implementation

The Structural Design of Tall and Special Buildings ◽

10.1002/tal.270 ◽

2005 ◽

Vol 14 (2) ◽

pp. 165-174 ◽

Cited By ~ 4

Author(s):

J. Y. Xu ◽

J. Tang ◽

Q. S. Li

Keyword(s):

Active Control ◽

Structural Control ◽

Control Devices ◽

Control Implementation

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Control Strategy Research on Controllable Pendulum in Step Perturbation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.602-605.1387 ◽

2014 ◽

Vol 602-605 ◽

pp. 1387-1390

Author(s):

Geng Biao Shen ◽

Fan Li ◽

Zi Chao Zhang ◽

Jian Hui Zhao

Keyword(s):

Autonomous Navigation ◽

State Feedback ◽

Decoupling Control ◽

Control Law ◽

Strategy Research ◽

Existing Problems ◽

Indirect Control ◽

Control Scheme ◽

Preliminary Study ◽

And Control

Applying controllable pendulum to indicating vertical is a new method which can be used for autonomous navigation. There are some studies on the method and it puts forward the existing problems. In this paper, it carries on the preliminary study on drawbacks that it exists steady-state error in controllable pendulum, and designs a new control scheme combined direct control with indirect control while there is step perturbation. Then it designs the corresponding control law by using observer with state feedback and decoupling control. It makes software simulation by Matlab and the results show that the controllable pendulum can be controlled well to indicate vertical by using the designed control scheme and control law when it exists step perturbation.

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Decoupling Control of Three Phase Boost Type PWM Rectifiers Based on Storage Function

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.3988 ◽

2011 ◽

Vol 71-78 ◽

pp. 3988-3991

Author(s):

Jiu He Wang ◽

Hong Ren Yin

Keyword(s):

Control System ◽

Harmonic Distortion ◽

Decoupling Control ◽

Total Harmonic Distortion ◽

Control Law ◽

Pwm Rectifier ◽

Storage Function ◽

Simulink Simulation ◽

Three Phase ◽

Pwm Rectifiers

Based on the model of three phase boost type PWM rectifier in synchronous dq coordinates, a simple control law, which transforms the rectifier control system into decoupling and linear one,is deduced based on storage function. New rectifier control system based on the law has many advantages, such as simpler structure, and low total harmonic distortion,and good robustness for load. Decouping control system of three phase boost type PWM rectifiers is proved feasible by simulink simulation.

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