Fault Detection in Nonlinear Systems Via Linear Methods

Abstract

The problem of robust linear and nonlinear diagnostic observer design is considered. A method is suggested to construct the observers that are disturbance decoupled or have minimal sensitivity to the disturbances. The method is based on a logic-dynamic approach which allows us to consider systems with non-differentiable nonlinearities in the state equations by methods of linear algebra.

Keywords

• nonlinear dynamic systems
• diagnostic observers
• robustness
• non-differentiable nonlinearities
• logic-dynamic approach