Digital flight control reliability - Effects of redundancy level, architecture and redundancy management technique

Rice, John W.; Mccorkle, R.

doi:10.2514/6.1979-1893

Cited by 4 publications

(1 citation statement)

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“…The plots shown in figure 8 are functions of several variables such as: servo reliability, actuator placement, surface coupling, mission, etc. In general, there is a complex interplay between these different variables as shown by Rice and McCorkle [1979]. All the candidate architectures considered in this case study are single-string designs.…”

Section: Probability Of Catastrophic Failurementioning

confidence: 99%

Reliability Assessment of Actuator Architectures for Unmanned Aircraft

Venkataraman

Seiler²,

Lukátsi³

et al. 2017

Journal of Aircraft

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A reliability assessment framework is presented for small unmanned aerial vehicles. The analysis considers several candidate architectures with different numbers of controllable surfaces and servos. It is assumed that a servo fault detection algorithm is available and affected by known rates of false alarms and missed detections. The aircraft flight envelope is analyzed to determine the fault levels for which the aircraft can still be flown at a trim point. For these "flyable" fault levels, it is assumed that the flight control law can be reconfigured to safely land the aircraft. Finally, the probability of catastrophic failure is estimated based on the histogram of (pre-fault) control command distributions, mean time between failure of the individual servos, and missed detection and false alarm rates. In applying the framework to assess the reliability of the candidate architectures, several interesting observations on design trade-offs are made.

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Section: Probability Of Catastrophic Failurementioning

confidence: 99%