Redundant asynchronous microprocessor system for fault tolerant flight control and navigationUnlike their synchronized counterparts, redundant channels in an asynchronous flight system can, under no-fault conditions, exhibit cross-channel data disparities. Sources of these errors are examined in terms of the general, individual functions of the flight control and navigation application in the asynchronous digital environment. The effects of asynchronism on trajectory programmers, dynamic control algorithms and data reconstruction processes are examined in terms of data skews, data latencies, and clock rate uncertainties. An example is presented in which time corrections are applied to reduce the data disparities. Practical limitations of the approach of the example are discussed.
Document ID
19840044011
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dunn, W. R. (Southern Colorado, University Pueblo, CO, United States)