VIBRATION SUPPRESSION OF AN ELASTIC BEAM VIA SLIDING MODE CONTROL

2007 ◽  
pp. 237-242
Author(s):  
Mehmet İtik ◽  
Metin U. Salamcı ◽  
F. Demet Ülker
Keyword(s):  
Sliding Mode Control ◽  
Vibration Suppression ◽  
Sliding Mode ◽  
Elastic Beam ◽  
Mode Control

scholarly journals Adaptive backstepping fuzzy sliding mode vibration control of flexible structure

2018 ◽  
Vol 37 (4) ◽  
pp. 1079-1096 ◽  
Author(s):  
Yunmei Fang ◽  
Juntao Fei ◽  
Tongyue Hu
Keyword(s):  
Sliding Mode Control ◽  
Cantilever Beam ◽  
Vibration Suppression ◽  
Sliding Mode ◽  
Nonlinear Function ◽  
Reference Trajectory ◽  
Adaptive Backstepping ◽  
Fuzzy Sliding Mode Control ◽  
Mode Control ◽  
Fuzzy Sliding Mode

An adaptive backstepping fuzzy sliding mode control is proposed to approximate the unknown system dynamics for a cantilever beam in this paper. The adaptive backstepping fuzzy sliding mode control is developed by combining the backstepping method with adaptive fuzzy strategy, where backstepping design approach is used to drive the trajectory tracking errors to converge to zero rapidly with global asymptotic stability and fuzzy logic system is designed to approximate the unknown nonlinear function in the adaptive backstepping fuzzy sliding mode control. The proposed backstepping controllers can ensure proper tracking of the reference trajectory, and impose a desired dynamic behavior, giving robustness and insensitivity to parameter variations. Numerical simulation for cantilever beam is investigated to verify the effectiveness of the proposed adaptive backstepping fuzzy sliding mode control scheme and demonstrate the satisfactory vibration suppression performance.

Variable fractional order sliding mode control for seismic vibration suppression of building structure

2021 ◽  
pp. 107754632110396
Author(s):  
Chunxiu Wang ◽  
Xingde Zhou ◽  
Yitong Jin ◽  
Xianzeng Shi
Keyword(s):  
Sliding Mode Control ◽  
Fractional Order ◽  
Vibration Suppression ◽  
Control Method ◽  
Sliding Mode ◽  
Building Structure ◽  
Seismic Excitations ◽  
Mode Control ◽  
Fractional Order Controller ◽  
Control Output

Constant fractional order vibration control strategy has been one of research hotspots in recent decades. However, the variable fractional order control method is seldom concerned up to now. In this article, a novel variable fractional order sliding mode control (VOSMC) method is proposed to suppress the responses of building structure caused by seismic excitations, including El Centro, Hachinohe, Northridge, and Kobe earthquakes. Based on the proposed variable fractional order sliding mode surface, the control law of VOSMC is presented. The global asymptotic stability of the control system is analyzed and proved by utilizing variable fractional order Lyapunov stability theorem. Besides, the corresponding constant fractional order sliding mode control (COSMC) method is also given. The control effects of VOSMC and COSMC methods are discussed by four performance indices. Finally, the utilizability and reasonability of the proposed control method is verified by using two examples (include two-story and five-story shear buildings). Compared with the COSMC method, the proposed variable fractional order controller not only has a lesser control output, but also has a higher utilization of the output, which is conducive to energy saving.

scholarly journals Super-twisting sliding mode control design based on Lyapunov criteria for attitude tracking control and vibration suppression of a flexible spacecraft

2019 ◽  
Vol 52 (7-8) ◽  
pp. 814-831 ◽  
Author(s):  
Reza Nadafi ◽  
Mansour Kabganian ◽  
Ali Kamali ◽  
Mahboobeh Hossein Nejad
Keyword(s):  
Sliding Mode Control ◽  
Vibration Suppression ◽  
Sliding Mode ◽  
Equations Of Motion ◽  
Beam Theory ◽  
Flexible Spacecraft ◽  
Sliding Surfaces ◽  
Mode Control ◽  
Attitude Tracking ◽  
Attitude Tracking Control

The three-axis attitude tracking manoeuvre and vibration suppression of a flexible spacecraft in the presence of external disturbances are investigated in this paper. The spacecraft consists of a rigid hub and two flexible appendages. The Euler–Bernoulli beam theory is used to model the flexible parts. The attitude dynamic equations of motion are derived using the law of conservation of angular momentum, and the flexural equations are derived. The attitude of the spacecraft is represented using the quaternion parameters. The controller is designed based on the super-twisting sliding mode control. The sliding surfaces are introduced and the global asymptotic stability of the flexible spacecraft on the sliding surfaces is assured via Lyapunov method. The control law is designed such that the sliding condition is satisfied and the system reaches the sliding surfaces in finite time. The simulation results verify the performance of the controller in the presence of bounded disturbances, sensor noises and abrupt changes in parameters.

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