Wide-band Loop Shaping for Modulation of Energy Transmission in Nonminimum-phase Systems

Modulating the closed-loop transmission of energy in a wide frequency band without sacrificing overall system performance is a fundamental issue in a wide range of applications from preci- sion control, active noise cancellation, to energy guiding. This paper introduces a loop-shaping approach to create such wide- band closed-loop behaviors, with a particular focus on systems with nonminimum-phase zeros. By pioneering an integration of the interpolation theory with a model-based parameterization of the closed loop, the proposed approach creates a framework to shape energy transmission with user defined performance met- rics in the frequency domain. Application to laser-based pow- der bed fusion additive manufacturing validates the feasibility to compensate wide-band vibrations and to flexibly control system performance at other frequencies.

Conference paper