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This study establishes a hybrid control framework for the high-accuracy regulation of inclination and azimuth. First, we derived a kinematic model characterizing the dynamic evolution of inclination and azimuth, explicitly addressing their coupled dynamics and azimuthal time-delay effects. A comprehensive downhole motion model was developed to capture system behavior. Distinct control strategies were formulated for the inclination and azimuth subsystems and integrated into a unified hybrid architecture. Stability analysis decomposes the system into individual control loops, with inclination stability ensured through conventional criteria, while azimuth stability is transformed into a solvable linear matrix inequality problem. Experimental validation demonstrates the superior robustness and engineering applicability of the method, achieving minimal attitude deviation under perturbed conditions. This control design provides a theoretically rigorous solution that bridges advanced control theory with practical well construction requirements.<\/jats:p>","DOI":"10.20965\/jaciii.2026.p1199","type":"journal-article","created":{"date-parts":[[2026,7,19]],"date-time":"2026-07-19T15:02:07Z","timestamp":1784473327000},"page":"1199-1208","source":"Crossref","is-referenced-by-count":0,"title":["Hybrid Control for High-Accuracy Inclination-Azimuth Regulation of Directional Drilling Attitude"],"prefix":"10.20965","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8709-9079","authenticated-orcid":true,"given":"Zhen","family":"Cai","sequence":"first","affiliation":[{"name":"School of Computer Science, Wuhan City Polytechnic University, No.127 Nanli Road, Hongshan District, Wuhan, Hubei 430072, China"},{"name":"School of Automation, China University of Geosciences, No.388 Lumo Road, Hongshan District, Wuhan, Hubei 430074, China"},{"name":"Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems, No.388 Lumo Road, Hongshan District, Wuhan, Hubei 430074, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qian","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Computer Science, Wuhan City Polytechnic University, No.127 Nanli Road, Hongshan District, Wuhan, Hubei 430072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiang","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Computer Science, Wuhan City Polytechnic University, No.127 Nanli Road, Hongshan District, Wuhan, Hubei 430072, China"},{"name":"School of Automation, China University of Geosciences, No.388 Lumo Road, Hongshan District, Wuhan, Hubei 430074, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pei","family":"Fu","sequence":"additional","affiliation":[{"name":"School of Computer Science, Wuhan City Polytechnic University, No.127 Nanli Road, Hongshan District, Wuhan, Hubei 430072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"8550","published-online":{"date-parts":[[2026,7,20]]},"reference":[{"key":"key-10.20965\/jaciii.2026.p1199-1","doi-asserted-by":"crossref","unstructured":"L. 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