Synthesis of complex sequential control systems from standard sequence packages

Abstract

The paper gives a qualitative treatment of a new approach to the synthesis of sequential control systems. Complex sequential control systems can be assembled from a relatively small number of standard sequence packages. These have useful sequential properties in their own right, but the methods for coupling them together to form larger sequential systems are described by the authors. Additional benefit is gained by using the machine actuators alone as memory devices. This removes any possibility of unintentional disturbance of the state of the memory function in the control system. Three examples are chosen to illustrate the design process.