For the operating condition under consideration, we used System Identification to derive
a linear model of the engine from experimental data. The frequency response from the
manipulated variables EGRLIFT and VGTPOS to the controlled variables BOOST and EGR
MF appears below. Note that the plant is ill conditioned at low frequency which makes
independent control of boost pressure and EGR massflow difficult.
sigma(Plant(:,1:2)), grid
title('Frequency response of the linearized engine dynamics')
Control Objectives
There are two main control objectives:
MIMO Control of Diesel Engine