Neo-modern control theory: Linear and nonlinear servomechanism design

In designing and analyzing Type 1, second-order feedback control systems, a linear mode technique is the usual method of approach. Any adverse effects on system performance due to non-linearities are often explained away as the limiting condition in which the system can operate with any degree of predictability. It is the purpose of this paper to present a neomodern control theory with emphasis on a highly predictable technique for nonlinear analysis and design. Practical applications of this technique to the analysis of servo loops in the Central Air Data Computers of the F-111, C-141, and other aircraft present conclusive evidence of its usefulness and its importance to the state-of-the-art of nonlinear systems.