Hard deadlines in real-time control systems

In a real-time control system, transient computer failures caused by electromagnetic interference(s) may seriously affect system stability due to not updating the control input properly. This paper presents a method for deriving hard deadlines by examining the stability of the state difference equations modified with an assumed maximum delay and several random sequences that represent the effects of stationary occurrences of disturbances to, as well as random delays of, the control input. A one-shot event model, in which a single long-lasting fault causes a dynamic failure, is also presented based on state trajectories and allowed state spaces.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/30666/1/0000309.pd