| Abstract: | In this paper, we investigate the effect of state and measurement variations on linear time-invariant state (LTI) observers’ performance robustness and error dynamics. These observers are widely used in control engineering, and, more recently, modern automotive powertrain applications. They have a proven and well documented degree of reliability and efficiency in the approximation of systems’ states. When well designed, they exhibit negligible steady state errors. In this study, we apply observer theory to an internal combustion engine (ICE) model. We also investigated state and sensor measurement disturbances that occur during common operation of the system. An analysis of the change in the observer error dynamics, and subsequent performance robustness is presented.
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