Constructing Liapunov Functions by Means of the Analog Computer

Lur'e's method in constructing Liapunov functions is well known. For a higher order feedback system, however, the last steps of his process is not very practical. This paper attempts to offer a method for solving the nonlinear algebraic equations by using the analog computer instead of finding the sufficient conditions. Thus a Liapunov function can be constructed which is not easily obtained by his original technique.