Stochastic perturbation analysis of computer control systems subject to electromagnetic disturbances


Gray W., Gonzalez O. R., Doğan M.

Proceedings of the 1999 IEEE International Conference on Control Applications (CCA) and IEEE International Symposium on Computer Aided Control System Design (CACSD), Kohala Coast, HI, USA, 22 - 27 August 1999, vol.2, pp.1797-1802 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 2
  • City: Kohala Coast, HI, USA
  • Page Numbers: pp.1797-1802
  • Istanbul Technical University Affiliated: No

Abstract

High intensity electromagnetic radiation has been demonstrated to be a source of computer upsets in commercially available digital flight control systems. Thus, there is a strong need to investigate its effect on stability and performance. In [3]-[5], electromagnetic disturbances were modeled with a continuous-time Markovian exosystem generating disturbance events. To analyze the effect of these disturbances, the radiated system was modeled as a discrete-time jump linear system with an appropriate set of transition probability rates. The linear systems in this model were all deterministic, hence this method rendered a worst-case stability analysis. In this paper, the technique is generalized by allowing stochastic perturbations to be randomly introduced by the exosystem model. A preliminary stability theory is developed, and an example is presented to compare stability boundaries for radiation parameters using this model against the worst-case scenario.