H8/LTR-Based Synthesis of Multivariable 2-Rate Dynamic Output Feedback Control With Some Applications

• 成果类型: Article
• 署名作者: Bhattacharya, Sragdhara; Ghosh, Arun; Das, Sarit K.
• 署名单位: Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Kharagpur
• 刊物名称: IEEE TRANSACTIONS ON AUTOMATIC CONTROL
• ISSN/ISSBN: 0018-9286
• DOI: 10.1109/TAC.2022.3207806
• 发表日期: 2023
• 页码: 4474-4481
• 关键词: Multivariable systems; quantized control; Robust control; 2-Rate control; zero-dynamics cyberattack; zero placement

摘要

Aiming to provide better compensation to discrete time (or, sampled-data), multivariable, linear time-invariant (LTI) plants that have nonminimum phase zeros, this article proposes a 2-rate, 2-degree-of-freedom, dynamic output feedback controller. Employing the lifting technique that may convert a 2-periodic system to a time-invariant form, it is shown that, under certain conditions, the equivalent LTI plant becomes a minimum-phase one. Consequently, an H8/loop-transfer-recovery-based LTI approach is used to compensate the same in respect of both robustness and response. Several examples are presented to show that the proposed 2-rate compensation may provide 1) superior robustness against plant parameter variations, 2) improved quantized control, and 3) detection and mitigation of zero-dynamics attack (ZDA) in cyber-physical systems (CPSs).