Abstract

This paper proposes a pair of new order hold techniques, Averaging method and Arc-Shaped fractional order hold which offer better approximation to a continuous time analog signal, after being sampled. To prove superiority, different order hold methods such as Zero Order Hold (ZOH), First Order Hold (FOH) and an existing improved fractional order hold are evaluated primarily. Furthermore, an automatic selective technique is introduced which can include all the benefits of the existing methods in a simple way to achieve better performance of discretization procedure. The capability of the new approach is tested by using a set of real environmental data.