title = "The role of data choice in data driven identification
for online emission models",
booktitle = "IEEE Symposium on Computational Intelligence in
Vehicles and Transportation Systems (CIVTS 2011)",
year = "2011",
month = "11-15 " # apr,
address = "Paris",
pages = "46--51",
size = "6 pages",
abstract = "Data driven models are known to be a valid alternative
to first principle approaches for modelling. However,
in the case of complex and largely unknown systems such
as the chemical reactions leading to engine emissions,
experience shows that results from data driven models
suffer from a significant dependence on the actual data
set used for identification and are prone to an
excessive complexity. This paper shows how the use of
an incremental design of experiments based on
polynomial models can be used to determine the
appropriate complexity of the data set as well as a
suitable measurement profile which yields an adequate
excitation for the model parameter estimation. As this
paper shows experimentally, this result is not specific
to the particular identification approach used, but the
same data set can be used e.g. by genetic programming
(GP) algorithms which extract also the model structure
from data. Results are shown using emission
measurements on a modern turbocharged Diesel engine on
an emission test bench.",
keywords = "genetic algorithms, genetic programming, chemical
reactions, complex systems, data choice, data driven
identification, data set, design of experiments,
emission measurements, engine emissions, model
parameter estimation, modern turbocharged diesel
engine, online emission models, polynomial models, air
pollution, data models, design of experiments, diesel
engines, large-scale systems, mechanical engineering
computing, parameter estimation, polynomials",