Abstract
A novel active isolation method for weak faults based on zonotopes is proposed. First, a zonotopic filter is designed to estimate the system state; subsequently, an auxiliary signal is designed based on the obtained state set, and the auxiliary signal is added to both the normal and fault models to ensure that the intersection of their state sets is empty. Then, the intersection solution process is transformed into an optimization problem. Finally, simulation results from a numerical simulation and an experiment on a DC–DC circuit platform verify that the auxiliary signal designed using this method is more optimal and less conservative compared with other auxiliary signal design methods.
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