arXiv subjects
Publications and source records attributed to Mohammad Mahdi Share Pasand.
This paper introduces a new nonlinear observer for state estimation of linear time invariant systems. The proposed observer contains a (nonlinear) cubic term in its error dynamics. "For the final version of this article, please refer to the published version in Int. Jr. of Adaptive Control and Signal Processing. The differences between the published and arxiv version are substantial and significant"
This paper utilizes the recently proposed cubic observer to estimate the state of a class of nonlinear systems. The cubic observer is proposed as an alternative to linear observers for improved convergence rate and robustness. It is shown that the proposed cubic observer can enhance the estimation compared to linear observers used for the same process. The proposed observer can be viewed as a generalization to the linear observer. To further enhance the cubic observer, a composite observer is proposed which combines the high gain observer design principle with the cubic observer structure. An example is included to show the efficacy of the proposed observer.
This paper extends the application of a recently proposed nonlinear observer (cubic observer) for state estimation of linear systems with unknown inputs and delays. The generalized structure proposed here, makes it possible to establish a performance advantage over a similar linear observer. Convergence criteria, performance advantages, unknown input cubic observer and observer design for delayed linear systems are discussed. A simulation example are given as well.