
QFT Frequency Domain Control Design Toolbox  Features
This Toolbox facilitates computing QFT bounds, nominal loop and prefilter shaping, and performance validation in continuous and direct zdomain systems. The following key features of the toolbox support the use of QFT design methods:
 Eleven toolbox functions efficiently compute appropriate QFT frequency domain bounds for a given uncertain plant and performance specifications.
 An extensive GUI enables semiautomatic shaping of a nominal loop function to satisfy QFT bounds. Functions are provided to compute addition, multiplication, and closedloop response of uncertain transfer function of sets in complex, num/den, and LTI formats. Mousedriven classical loop shaping and other useful utility functions are also provided.
 The design of singleloop feedback systems is fully supported for both continuous time and discrete time. Detailed examples illustrate cascaded and multiloop problems.
 Plant uncertainty can be defined using parametric models (such as transfer functions), nonparametric models (such as unstructured uncertainty or measured frequency response sets), or a combination of both. Detailed examples are provided for each of these types of systems.
