A Robust Exact Differentiator Block for MATLAB/Simulink
We have implemented a differentiator block for Simulink. The implemented algorithm is based on the ideas of higher order sliding mode differentiators. They are known to exactly compute derivatives of signals and, in the case of noisy input signals, they provide the theoretically best possible estimate of the exact derivative.
Meanwhile the toolbox is available as version 1.0 and version 2.0 (beta). Latter is recommended to be used in simulations where the accuracy of the estimation is limited due to a large sampling step size. In version 2.0 an improved estimation accuracy may be the result for large simulation step size.