Richard H. Middleton

TL;DR: A signal-to-noise ratio (SNR) approach is used to obtain a tight condition for the linear time invariant output feedback stabilisation of a continuous-time, unstable, non minimum phase (NMP) plant with time-delay over an additive Gaussian coloured noise communication channel.

TL;DR: In this article, the relationship between the continuous-time Riccati equation and the corresponding discrete-time equation with fast sampling has been explored and the interconnection is established by formulating the discrete case using delta operators.

TL;DR: Algorithms to find the optimal solution are presented and an example, taken from a simplified model for HIV mutation mitigation is discussed, showing that the cost is convex with respect to the control variables.

TL;DR: The theory of inherent design limitations provides the basic scientific background for the field of linear feedback control, and all control engineers need to know the basic results from this area as mentioned in this paper, and such knowledge is useful much earlier in the engineering design cycle, in order to configure the plant and specify sensors and actuators so that the resulting feedback control problem is tractable.

TL;DR: In this article, the authors show that a similar result holds for the class of all stable unbiased state estimators, and this result is believed to have major implications for the design of robust estimators to deal with non-standard noise sources, modelling errors, etc.