Finite‐Time Secured Non‐Fragile Control Design for Engine Throttle Valve System With Multiple Attacks Under Proportional Integral Observer

ABSTRACT This article centers on the secured non‐fragile control design for engine throttle valve systems subject to multiple attacks and external disturbances, which is crucial in data security and reliable functioning. Specifically, for the engine throttle valve systems, multiple cyber‐attacks, such as deception assaults and denial‐of‐service attacks, are taken into account in a unified framework. Further, a proportional integral observer is put‐forward for reliably estimating the immeasurable states of the underlying system, which affords enhanced design freedom and superior steady‐state precision. From thereon, by making use of the state information received from the observer and considering the unique aspects of the attack, we laid out a proportional integral observer‐based secured non‐fragile scheme. Besides, adequate stability criteria in the realm of linear matrix inequalities are developed by merging the concepts of Lyapunov stability theory with finite‐time theory, for ensuring the desired outcomes. These criteria then form the foundation for the controller and the observer gain design process. Finally, simulation insights are set forth to corroborate the theoretical conclusions that have been come up with.