Novel Summation-Type Triggering Condition on Event-Based Memory Output Feedback Control for Networked Control Systems

• Main Authors: Wookyong Kwon, Jaemin Baek
• Format: Article
• Language: English
• Published: MDPI AG 2020-05-01
• Series: Electronics
• Subjects: networked control systems; memory elements; output feedback control; linear matrix inequalities (LMIs)
• Online Access: https://www.mdpi.com/2079-9292/9/5/779

Networked control systems are widely spread, which is composed of numerous sensor and control nodes through communication channel. In this paper, an event-triggered <inline-formula> <math display="inline"> <semantics> <msub> <mi>H</mi> <mi>∞</mi> </msub> </semantics> </math> </inline-formula> memory output feedback control (EMOFC) is investigated for networked control linear systems in discrete form. The memory control employing memorized past information is exploited to enhance the triggering intervals under event-triggered condition. Moreover, novel summation type event-triggering condition is newly proposed by utilizing buffer memory element. Based upon memory control and novel triggering conditions, the control design methodology is constructed for transformed input-delay model in forms of linear matrix inequalities (LMIs) adopting generalized free-weighting matrix summation inequality. As a result, the proposed scheme shows off the reduction of average signal transmission frequency and reliability while covering standard condition. Throughout numerical examples, the effectiveness is shown and the effect of memory element is analyzed.