Nonlinear modeling and control of a spark ignition engine idle speed / Hazem Mohamed
The main objective of this research work is to model and control the idle mode of a four cylinder spark ignition engine. The modeling approach is to handle the engine as a multi input multi output nonlinear black box model, where the inputs are the throttle angle and the spark timing and the outp...
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| Format: | Thesis |
| Published: |
1998
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| Subjects: | |
| Online Access: | http://studentsrepo.um.edu.my/7525/1/NONLINEAR_MODELING_AND_CONTROL_OF_A.pdf http://studentsrepo.um.edu.my/7525/ |
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| Summary: | The main objective of this research work is to model and control the idle mode of a
four cylinder spark ignition engine. The modeling approach is to handle the engine as
a multi input multi output nonlinear black box model, where the inputs are the throttle
angle and the spark timing and the outp'uts are the speed and manifold pressure.
The input output data was collected from an experimental four cylinder spark ignition
engine, then this data is fitted to a NARMAX model using a radial basis function
network trained by the orthogonal least squares algorithm. After that the developed
model is validated using nonlinear correlation tests and it could efficiently reproduce
the plant dynamics.
Tlie control teclmique used is the fuzzy control. The fuzzy controller is
formulated as a radial basis function network trained by the orthogqnalleast squares
algorithm to estimate the controller parameters. The train~ng data of the network is the
entries of an optimal control table derived by analyzing the evolution of the state
trajectories of the system under different initial conditions using the cell to cell
mapping technique. The developed controller can efficiently stabilize the plant and
compensate for different uncertainties and nonlinearities of the plant. |
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