Active Vibration Control using LQG Algorithm

Alphonse, D and Krishna, Bipin (2013) Active Vibration Control using LQG Algorithm. In: CSIR Sponsored X Control Instrumentation System Conference, December 20-21, 2013, Manipal.

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Active vibration control methods can be used to eliminate undesired vibrations in engineering structures. Using piezoelectric smart structures for the active vibration control has great potential in engineering applications. This paper discuss about the design, simulation and validation of a Linear Quadratic Gaussian (LQG) controller to generate the control signals for the piezoelectric smart structures for the active vibration suppression of a cantilever beam structure. The cantilever beam model is developed and the transfer functions for the first few vibrational modes are obtained from the frequency response of the developed model. LQG controller is a combination of Kalman filter and linear quadratic regulator. The piezoelectric actuator and accelerometer sensor parameters are incorporated into the simulation model. The controller is designed in MATLAB/Simulink. The LQG regulators were evaluated via simulations in order to regulate the vibration level of the cantilever beam around the zero value. The efficiency of the controller in regulating the vibrations was verified by simulations. The performance of the controller is validated from the simulation results. The experimentally obtained time domain and frequency responses have demonstrated that the designed controller successfully suppressed the vibration levels for the first vibrational mode of the cantilever smart beam.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Smart Structures, LQG, Kalman Filter, LQR, PZT Actuator/Sensors, MATLAB, Simulink
Subjects: Engineering > MIT Manipal > Instrumentation and Control
Depositing User: MIT Library
Date Deposited: 22 Jun 2016 14:05
Last Modified: 22 Jun 2016 14:05

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