The use of industrial robots in the advanced countries of the world is growing. Whilst generally the concept of a robot is taken as a highly versatile human‐like device the term also extends to include much simpler devices of the pick‐and‐place type with a fixed sequence of events and these form by far the largest proportion of the world's robot population. Whilst they lack versatility in themselves they often form part of a much more complex automatic system in which some degree of flexibility is required. In addition they must operate at their optimum rate whilst being fail‐safe in operation. The design of a suitable control system to meet such demands particularly when a number of such devices and the primary process machinery have to be interlinked can be solved with the aid of sequential switching theory.
Rooks, B., Okpere, K. and Cheng, R. (1974), "Asynchronous Sequential Control of a Billet Handling System for Feeding a Hot Forging Machine", Industrial Robot, Vol. 1 No. 2, pp. 66-71. https://doi.org/10.1108/eb004448Download as .RIS
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