Robust Stability Analysis of Positive Lure System with Neural Network Feedback
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| Format: | Preprint |
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2025
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| author | Hedesh, Hamidreza Montazeri Wafi, Moh. Kamalul Shafai, Bahram Siami, Milad |
| author_facet | Hedesh, Hamidreza Montazeri Wafi, Moh. Kamalul Shafai, Bahram Siami, Milad |
| contents | This paper investigates the robustness of the Lur'e problem under positivity constraints, drawing on results from the positive Aizerman conjecture and robustness properties of Metzler matrices. Specifically, we consider a control system of Lur'e type in which not only the linear part includes parametric uncertainty but also the nonlinear sector bound is unknown. We investigate tools from positive linear systems to effectively solve the problems in complicated and uncertain nonlinear systems. By leveraging the positivity characteristic of the system, we derive an explicit formula for the stability radius of Lur'e systems. Furthermore, we extend our analysis to systems with neural network (NN) feedback loops. Building on this approach, we also propose a refinement method for sector bounds of NNs. This study introduces a scalable and efficient approach for robustness analysis of both Lur'e and NN-controlled systems. Finally, the proposed results are supported by illustrative examples. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_18912 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Robust Stability Analysis of Positive Lure System with Neural Network Feedback Hedesh, Hamidreza Montazeri Wafi, Moh. Kamalul Shafai, Bahram Siami, Milad Systems and Control Artificial Intelligence 93D09, 93D20, 93C10, 68T07 B.1.3; G.1; I.2; I.2.3; I.2.8; I.2.1; J.2 This paper investigates the robustness of the Lur'e problem under positivity constraints, drawing on results from the positive Aizerman conjecture and robustness properties of Metzler matrices. Specifically, we consider a control system of Lur'e type in which not only the linear part includes parametric uncertainty but also the nonlinear sector bound is unknown. We investigate tools from positive linear systems to effectively solve the problems in complicated and uncertain nonlinear systems. By leveraging the positivity characteristic of the system, we derive an explicit formula for the stability radius of Lur'e systems. Furthermore, we extend our analysis to systems with neural network (NN) feedback loops. Building on this approach, we also propose a refinement method for sector bounds of NNs. This study introduces a scalable and efficient approach for robustness analysis of both Lur'e and NN-controlled systems. Finally, the proposed results are supported by illustrative examples. |
| title | Robust Stability Analysis of Positive Lure System with Neural Network Feedback |
| topic | Systems and Control Artificial Intelligence 93D09, 93D20, 93C10, 68T07 B.1.3; G.1; I.2; I.2.3; I.2.8; I.2.1; J.2 |
| url | https://arxiv.org/abs/2505.18912 |