Stability analysis of feedback systems with dead-zone nonlinearities by circle and Popov criteria

作者：Saeki Masami^*; Wada Nobutaka^*; Satoh Satoshi^*

来源：Automatica, 2016, 66: 96-100.

DOI：10.1016/j.automatica.2015.12.020

• Stability analysis
• Absolute stability
• Global stability
• Dead zone
• Saturation
• Bounded disturbances

A method of global stability analysis is proposed for a feedback system with dead-zone nonlinearities. Using a global property that the output of a saturation function is bounded, the bound on the input to the saturation function is estimated using the L-infinity norm of a linear subsystem. The feedback system can be treated as a feedback system with a narrower sector bound using this method, and a sharper global stability condition is obtained by applying the circle or Popov criterion to the system.

• 出版日期2016-4