Method of faults identification in non-stationary systems

The article presents a new method for faults identification in mechatronic systems, described by non-stationary nonlinear differential equations, in the presence of perturbations. Observers working in a sliding mode are used to solve the problem. The proposed approach is based on the idea of constructing a reduced (with lower dimension) model of the original system with selective sensitivity to faults and disturbances. The main purpose of introducing such a model is the ability to take into account the nonstationarity of the system. The stated theory is illustrated by a practical example. Key words Fault identification, non-stationary systems, observers. Acknowledgements The work was supported by the Russian Foundation for Basic Research (project no. 20-38-70161), and also partially by the grant of the President of the Russian Federation, SP-3252.2019.5.