Persons at STU
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Basic information about a final thesis
Type of thesis:
|Modeling and control of the electronic throttle in spark ignited combustion engines|
|Written by (author):|
|Institute of automation, measurement and applied informatics (FME)|
|prof. Ing. Boris Rohaľ-Ilkiv, CSc.|
|Opponent 1:||prof. Ing. Mikuláš Alexík, CSc.|
|doc. Ing. Ján Dvoran, CSc.|
Final thesis progress:
Final thesis was successfully defended.
Additional informationAdditional information about the final thesis follows. Click on the language link to display the information in the desired language.
Language of final thesis:
|Title of the thesis:|
Modeling and control of the electronic throttle in spark ignited combustion engines
|The submitted dissertation thesis deals with the modeling and control of the electronic throttle (ET) in spark ignited combustion engines. The analog current regulator was designed and built as a part of this thesis, this enables to excite the mechanical part of the ET with described torque trajectories. The methods of the experimental identification of the electronic throttle along with optimization based parameters estimation are presented in this thesis. The electronic throttle is a nonlinear system with the presence of two strong nonlinearities, friction and nonlinear return spring. For the purpose of modeling the friction phenomenon the LuGre friction model was used. The nonlinear return spring torque was modeled with the use of piecewise affine functions. Due to the LuGre model properties, continuous transition between the static and dynamic friction torque modeling was applied to avoid instability of the numerical solution with the use of a fixed step length. For the purpose of evaluating the cost function value, the step length of the numerical solution was computed in dependance of the parameters in the process of the optimization based parameters estimation. Two nonlinear controllers have been designed as the part of this thesis. The first controller was based on the feedback linearization method with the use of the discrete time PID controller for the linear rest of the overall system dynamic. The performance of this controller was tested in real-time application with the use of the real electronic throttle. The nonlinear model predictive controller was designed as the second throttle plate position controller. The performance of this nonlinear model predictive controller was tested in simulation. This controller was designed to respect the constraints on input variable and throttle plate angular velocity.|
electronic throttle, modeling, optimal parameter estimation, feedback linearization, nonlinear model predictive control
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