Robust sensor fault diagnosis based on right eigenvector assignment

The fault diagnosis residual generator based on full order observer is designed aimed at the linear uncertain system having unknown disturbances. The method combined Singular Value Decomposition with right eigenvector assignment is developed, and the observer right eigenvectors are assigned parallel to the disturbance distribution directions, so it makes the residual generator itself decouple from disturbances and the residual signal robust with disturbances. The residual is not influenced by the uncertain disturbances in the process of sensor fault diagnosis and the reliability and precision of fault diagnosis are improved. The simulation results verify the method validity.