Some results regarding observability and initial state reconstruction for time-fractional systems

Abstract

The aim of this study is to present the notion of observability for a specific class of linear time-fractional systems of Riemann-Liouville type with a differentiation order between 1 and 2. To accomplish this goal, we first define the concept of observability and its features, then we extend the Hilbert Uniqueness Method (HUM) to determine the system's initial state. This method converts the reconstruction problem into a solvability one, leading to an algorithm that calculates the initial state. The effectiveness of the proposed algorithm is demonstrated through numerical simulations, which are presented in the final section.

Keywords

• Fractional calculus
• Control theory
• Time-fractional systems
• Global observability
• HUM approach
• Numerical approach