Active intelligent control of vibration of flexible plate structures
The development of intelligent control approaches for vibration reduction of flexible plate structures are investigated and reported in this thesis. In this work active intelligent control comprises a set of control techniques based on particle swarm optimisation (PSO), real coded genetic algorithm...
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| Format: | Thesis |
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2011
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| Online Access: | http://eprints.uthm.edu.my/3933/ http://eprints.uthm.edu.my/3933/1/salihatun_md_salleh.pdf |
| Summary: | The development of intelligent control approaches for vibration reduction of flexible
plate structures are investigated and reported in this thesis. In this work active
intelligent control comprises a set of control techniques based on particle swarm
optimisation (PSO), real coded genetic algorithm (RCGA) and artificial immune
system (AIS). A traditional method of recursive least squares (US) is investigated as
a comparison to the proposed intelligent techniques. The aim of this work is to assess
the potential applicability of the intelligent techniques in the active vibration control
(AVC) of flexible structures. A simulation environment characterising the dynamic
behaviour of a flexible plate structure is developed using finite difference methods
and state-space formulation. This is realised within MatlabISIMULINK as a testbed
for verification of control designs. The plate is subjected to different disturbance
signals and linear parametric models characterising the inputloutput dynamic
behaviour of the plate, between two measurement points, is developed using RLS,
RCGA, PSO and AIS algorithms. It is demonstrated through time-domain and
frequency-domain analysis and tests that the RCGA, PSO and AIS approaches
perform very well in modelling of the flexible plate. The modelling approach is
extended to a model-based AVC strategy using the principle of wave interference.
The approach is first realised within a single-input single-output (SISO) control
configuration with RLS, RCGA, PSO and AIS algorithms. Tests with various
disturbance signals show that good vibration reduction is achieved with the developed
model-based SISO-AVC algorithms. The approach is then realised within a singleinput
multi-output (SIMO) control configuration, and exemplified in vibration control
tests with two control sources. It is shown that higher levels of vibration can be
achieved with model-based SIMO-AVC algorithms as compared to those modelbased
SISO-AVC algorithms. A further strategy based on non-model based control is
developed for vibration reduction in flexible structures. The approach is realised
within SISO and SIMO AVC structures using RCGA, PSO and AIS algorithms.
These are implemented on the flexible plate structure with various disturbance
signals. It is demonstrated that the non-model based AVC algorithms perform
comparatively similar to their model-based AVC counterparts in terms of amount of
vibration reduction. However, the non-model based AVC algorithms are faster than
their model-based AVC counterparts. |
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