Nianchun Cai

We don’t have enough information about this author to calculate their statistics. If you think this is an error let us know.
Learn More
Due to high nonlinearity and parameters' indeterminacy, it is hard to improve dynamic response performance for the hydraulic servo system. On the basis of fractional calculus, a kind of fractional order control method is proposed in this paper. It takes third-order hydraulic position servo system based on PMAC(Programmable Multi-Axes Controller) as an(More)
In this paper, an improved fractional order proportional integral controller parameter tuning method has been proposed. This method is to map the controller to get a set of vectors in the complex plane. Following the method of vector and geometric in the complex plane, the complicated derivation and calculation can be simplified in the process of the(More)
In this paper, five parameters tuning method of fractional order controller with strong robust and system open-loop gain changes was presented. In order to enhance the robustness to open-loop gain changes, the method based on the FLATPHASE method adds two constraints to expand the flat range of phase Bode plot of open-loop transfer function for fractional(More)
Any order analog fractance circuit based on a method of constructing the rational approximation function in the form of factorization is designed. The circuit is made up of level-N passive RC parallel network that makes the circuit easy integration in which the size of N is equal to the order of rational function. Since the rational approximation function(More)
  • 1