Design and development of a model free robust controller for active control of dominant flexural modes of vibrations in a smart system

Kajiwara

Journal of Vibration and Control

2020

The purpose of this study is to develop a simple and practical controller design method without modeling controlled objects. In this technique, modeling of the controlled object is not necessary and a controller is designed with an actuator model, which includes a single-degree-of-freedom virtual structure inserted between the actuator and the controlled object. The parameters of the virtual structure are determined so that indirect active vibration suppression is effectively achieved by considering the frequency transfer function from the vibration response of the controlled object to that of the virtual structure. Since the actuator model, which includes a virtually controlled object, is a simple low-order system, a controller with high control performance can be designed by traditional model-based optimal control theory. In this research, a mixed [Formula: see text] controller is designed considering both control performance and robust stability. The effectiveness of the proposed method is validated experimentally. The robustness of the controller is demonstrated by applying the same controller to various structures.

Section: Introductionmentioning

confidence: 99%

Experimental verification of model-free active vibration control approach using virtually controlled object

Kajiwara

Journal of Vibration and Control

2020

Noise & Vibration Worldwide

“…Both experimental and numerical methods were used to investigate the influence of temperature on control strategy and the damping parameters. Parameswaran et al 24 attained up to 50% of vibration reduction of the beam structure using a PID control algorithm. The model-free sliding mode robust controller was developed in order to reduce the computational time and to reduce the demand for higher memory/hardware resources.…”

Section: Introductionmentioning

confidence: 99%

“…This is due to the change in system dynamics upon application of the control force. 24,25 Sharma et al 26,27 designed a fuzzy logic-based modal controller for AVC of a cantilevered beam using piezo patches as sensors and actuators. The results indicate that the controller is more effective for the fundamental mode compared to the higher modes of vibration.…”

Section: Introductionmentioning

confidence: 99%

Vibration control of laminated composite cantilever beam operating in elevated thermal environments using fuzzy logic controller

Akumalla

Kallannavar

Kattimani

2022

In the present study, vibration control of laminated composite cantilever beam operating in the elevated thermal environment is achieved using combined experimental and numerical techniques. The impact hammer test is performed on the glass-epoxy cantilever beam at different temperatures. Experimentally recorded impact hammer force signals and piezoelectric accelerometer time-domain signals are processed through a system identification toolbox in MATLAB to obtain transfer functions of the plant models. A robust fuzzy logic controller is developed to accomplish the effective vibration control of a cantilever composite beam operating at different temperatures. The fuzzy logic controller with two inputs and one output is designed using the 20 if-then rules. The results are presented in both frequency and time domain, keeping the vibration attenuation of the fundamental frequency as the point of interest. The results indicate the proposed fuzzy logic control strategy can attenuate the vibrations of a cantilever composite beam for a wide temperature range.

“…A second-order compensator for the displacement feedback and the first-order compensator for velocity feedback compose the controller. Parameswaran et al [12] presented a robust controller based on the sliding mode method on a simple cantilever beam. They explained that the first two bending modes are controlled to investigate the improved control strategy's operational effectiveness.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy logic aided PPF controller design to active vibration control of a flexible beam

Gülbahçe¹,

Çeli̇k²

2021

JSEAM

This paper presents a fuzzy-logic-based observer and a positive position feedback controller to reduce a standard beam's free vibrations using a piezoelectric actuator. It is aimed that fuzzy-logic-based observer is used as feed-through and improves the overall performance of the PPF controller. For this aim, the cantilever beam and a piezoelectric patch are initially numerically modeled using the finite element method considering the close loop control algorithm. The displacement and strain responses results are compared with the experimental model. Then, two controllers are applied to the designed system: positive position feedback (PPF) and fuzzy-logic-based positive position feedback (FLBPPF). The uncontrolled and controlled system responses are investigated and compared in terms of the linear strain and tip displacement results. Using the FLBPPF controller, the settling times of controlled systems are decreased by about 20.7% and 41.6% regarding the linear strain and tip displacement response compared to the PPF controller.