Adaptive Sliding Mode Control for Civil Structures Using Magnetorheological Dampers
نویسندگان
چکیده
An adaptive sliding mode controller for vibration control is proposed in this paper for structures embedded with magnetorheological (MR) dampers. Civil structures and buildings are liable to damages during earthquake periods. The application of structural control methodologies is important in order to suppress vibrations due to seismic phenomena and dynamic loading. The use of sliding mode control is accounted for by its robustness to system uncertainties and external disturbances while a MR damper is technologically-efficient for its vibration control and also fail-safe for an ideal semiactive device. The control performance is enhanced by implementing an adaptive control law in estimating the system parameters. Simulation results are included to demonstrate the effectiveness of the proposed controller in a building model under earthquake-like excitations.
منابع مشابه
Application of self-tuning Gaussian networks for control of civil structures equipped with magnetorheological dampers
This paper proposes an adaptive neural network composed of Gaussian radial functions for mapping the behavior of civil structures controlled with magnetorheological dampers. The online adaptation takes into account the limited force output of the semi-active dampers using a sliding mode controller, as their reaction forces are state dependent. The structural response and the actual forces from ...
متن کاملOptimal Control via Integrating the Dynamics of Magnetorheological Dampers and Structures
Magnetorheological (MR) dampers have the advantage of being tuned by low voltages. This has attracted many researchers to develop semi-active control of structures in theory and practice. Most of the control strategies first obtain the desired forces of dampers without taking their dynamics into consideration and then determine the input voltages according to those forces. As a result, these st...
متن کاملSeismic Responses of Civil Structures under Magnetorheological-device Direct Control
This paper presents an efficient control strategy for magnetorheological (MR) dampers embedded in building structures to mitigate quake-induced vibrations. In this work, MR dampers are used as semi-active devices, taking the advantages of the fail-safe operation and low power requirement. By using a static hysteresis model for the MR damper, a suitable controller is proposed here for direct con...
متن کاملA magnetorheological fluid damper for robust vibration control of flexible rotor-bearing systems: A comparison between sliding mode and fuzzy approaches
Squeeze Film Dampers (SFD) are commonly used for passive vibration control of rotor-bearing systems. The Magnetorheological (MR) and Electrorheological (ER) fluids in SFDs give a varying damping characteristic to the bearing that can provide active control schemes for the rotor-bearing system. A common way to model an MR bearing is implementing the Bingham plastic model. Adding this model to th...
متن کاملControlling structures by inverse adaptive neuro fuzzy inference system and MR dampers
To control structures against wind and earthquake excitations, Adaptive Neuro Fuzzy Inference Systems and Neural Networks are combined in this study. The control scheme consists of an ANFIS inverse model of the structure to assess the control force. Considering existing ANFIS controllers, which require a second controller to generate training data, the authors’ approach does not need anot...
متن کامل