β Scribed by S.J. Goldsack; J. Kramer
No coin nor oath required. For personal study only.
The importance of an application-oriented specification as the starting point for control system design has recently been recognized. As an initial stage of the work of a Special Interest Group on Application Oriented Specifications, Hailing and others presented a review of the problem and some of the approaches to specification in current use. Control applications were divided into two broad classes: continuous control systems on the one hand, and sequential or discrete variable control systems on the other. Within the class of discrete systems a subclass of systems, where large volumes of data must he handled and real.time data manipulations must be specified, was also recognized. This paper aims to show that emphasis on the invariant properties of system elements can be helpful in presenting a system specification for all these types of systems.
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Necessary and sufficient conditions for feedforward control to exist in a linear multivariable system and an explicit feedforward controller are obtained, so that tracking when measurable disturbances are present occurs. Summary--Necessary and sufficient conditions are derived for a stable feedforw