| Citation | Goodwin's research is characterized by its unique blend of deep theory and industrial applicability. A highly important contribution, the first proof of the convergence of the adaptive, discrete-time, deterministic control algorithm, resolved a problem open for 30 years and had a dramatic effect on the development of the subject; this paper was recently selected as one of 25 seminal contributions to automatic control. Other significant contributions include the determination of necessary and sufficient conditions for convergence of the widely used Kalman filter, reduction of finite word errors in digital signal processing and control through the 'delta transform', and the resolution of inter-sample issues in digital control. His results on inherent limitations in filters and control systems have impacted significantly on industrial control. He is internationally recognised for his contribution to the theory and practice of automatic control. |