Vibration Control of Smart Structures Using Piezofilm Actuators

2006 ◽  
Vol 306-308 ◽  
pp. 1205-1210
Author(s):  
Seung Bok Choi ◽  
Jung Woo Sohn
Keyword(s):  
Vibration Control ◽  
Time Domain ◽  
Sliding Mode ◽  
Flexible Structures ◽  
Space Representation ◽  
Sliding Mode Controller ◽  
Separation Principle ◽  
Beam Structure ◽  
Experimental Realization ◽  
Smart Beam

This paper presents vibration control of a flexible smart beam structure using a new discrete-time sliding mode controller. After formulating the dynamic model in the space representation, so called the separation principle for equivalent controller is established so that the sliding mode conditions are satisfied. By doing this, undesirable chattering of the flexible structures can be attenuated in the settled phase. In order to demonstrate some benefits of the proposed methodology, an experimental realization is undertaken. Both transient and forced vibration control responses are evaluated in time domain and compared between with and without the separation principle.

Design of a novel adaptive fuzzy sliding mode controller and application for vibration control of magnetorheological mount

2014 ◽  
Vol 228 (13) ◽  
pp. 2285-2302 ◽  
Author(s):  
Do Xuan Phu ◽  
Nguyen Vien Quoc ◽  
Joon-Hee Park ◽  
Seung-Bok Choi
Keyword(s):  
Sliding Mode Control ◽  
Vibration Control ◽  
Sliding Mode ◽  
Shear Mode ◽  
Sliding Mode Controller ◽  
Experimental Realization ◽  
Mode Control ◽  
Fuzzy Sliding Mode ◽  
Interval Type

This paper presents vibration control of a mixed-mode magnetorheological fluid-based mount system using a new robust fuzzy sliding mode controller. A novel model of controller is built based on adaptive hybrid control of interval type 2 fuzzy controller incorporating with a new modified sliding mode control. The interval type 2 fuzzy is optimized for computational cost by using enhanced iterative algorithm with stop condition, and a new modified switching surface of sliding mode control is designed for preventing the chattering of the system. The controller is then experimentally implemented under uncertain conditions in order to evaluate robust vibration control performance. In addition, in order to demonstrate the effectiveness of the proposed controller, two fuzzy sliding mode control algorithms proposed by Huang and Chan are adopted and modified. The principal control parameters of three controllers are updated online by adaptation laws to meet requirements of magnetorheological mount system which has two operation modes: flow mode and shear mode. It is shown from experimental realization of three controllers that the proposed control strategy performs the best under uncertain conditions compared with two other modified controllers. This merit is verified by presenting vibration control performances in both time and frequency domains.

Robust vibration control of a flexible arm subjected to torque disturbance

2006 ◽  
Vol 220 (2) ◽  
pp. 149-158 ◽  
Author(s):  
S-B Choi
Keyword(s):  
Vibration Control ◽  
Sliding Mode ◽  
Sampling Period ◽  
Sampling Time ◽  
Sliding Mode Controller ◽  
Control Input ◽  
Experimental Realization ◽  
Average Value ◽  
Flexible Arm ◽  
Single Link

This paper presents a perturbation estimator in sliding mode control system and applies it to vibration control of a flexible arm subjected to torque disturbance. The proposed estimator is featured by an integrated average value of the imposed perturbation over a certain sampling period. By implementing this type of estimator, undesirable chattering phenomenon can be effectively alleviated in the estimation process. In addition, the proposed method offers a flexibility for tuning the ratio of the estimation sampling time to the control input sampling time. In order to demonstrate the effectiveness of the proposed methodology, a single-link flexible arm is constructed. After formulating the governing equation of motion, a sliding mode controller which is integrated with the proposed estimator is designed. Vibration control performances of the flexible arm subjected to sinusoidal torque disturbances are evaluated through both computer simulation and experimental realization.

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