Reputation-based networked control with data-corrupting channels

We examine the problem of reliable networked control when the communication channel between the controller and the actuator periodically drops packets and is faulty i.e., corrupts/alters data. We first examine the use of a standard triple modular redundancy scheme (where the control input is sent via three independent channels) with majority voting to achieve mean square stability. While such a scheme is able to tolerate a single faulty channel when there are no packet drops, we show that the presence of lossy channels prevents a simple majority-voting approach from stabilizing the system. Moreover, the number of redundant channels that are required in order to maintain stability under majority voting increases with the probability of packet drops. We then propose the use of a reputation management scheme to overcome this problem, where each channel is assigned a reputation score that predicts its potential accuracy based on its past behavior. The reputation system builds on the majo...

• Type: Journal
• Year: 2011
• Where: HYBRID
• Authors: Shreyas Sundaram, Jian Chang, Krishna K. Venkatasubramanian, Chinwendu Enyioha, Insup Lee, George J. Pappas
• Keywords: Control Systems, HYBRID 2011, Lossy Channels, Reputation Score, Reputation System