Method and apparatus for controlling a real time system

Details Method and apparatus for controlling a real time system Method and apparatus for controlling a real time system

1991-02-13

1994-10-18

Smith, Jerry

Boots, shoes, and leggings

364184, 364187, 371 91, 371 681, G05B 903

Patent

active

053574257

ABSTRACT:
A method and apparatus are disclosed for inherent, reliable control of real time systems. The technique is based on asynchronously scheduling a plurality of sensor sampling cycles over a suitable sampling interval. The corresponding plurality of sampling signals so obtained are temporally redundant and out of phase with respect to one another. This plurality of sampling signals is processed by a corresponding plurality of controllers. Thereafter, a multiplexor means is used to alternately and asynchronously receive from each controller a subinterval portion of each of the plurality of signals corresponding to each of the plurality of controllers. In this way the sampling interval is responsively partitioned into subintervals wherein each controller of the plurality effectively controls the system for each respective subinterval. Concurrent multiple control of each interval inherently masks and compensates for faults or failures. This inherent feature enhances the robustness, resiliency and reliability of typical control system designs through a relatively easy and inexpensive system upgrade involving the utilization of a temporally redundant sampling scheduling means in conjunction with a multiplexing means.

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