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The existing adaptive backstepping controllers fail to effectively distinguish the difference of disturbance between the mechanical subsystem and the hydraulic subsystem, which limits the compensation effect of multiple disturbances, especially for friction nonlinearity. Therefore, the adaptive backstepping-extended state observer position-tracking controller combined with compound friction compensation is proposed to simultaneously compensate for the fast-varying friction disturbance of a mechanical subsystem and the slow-varying matched disturbance of a hydraulic subsystem. The extended state observer algorithm is integrated into the adaptive backstepping controller to suppress the null bias of the average tracking error. The compound friction compensation includes a LuGre model-based compensation and a high-order disturbance observer, which can improve the tracking performance of system and avoids the excessive gain of observer. A large number of comparative experiments are conducted to verify the effective of the proposed controller.<\/jats:p>","DOI":"10.1177\/09596518231209222","type":"journal-article","created":{"date-parts":[[2023,12,7]],"date-time":"2023-12-07T23:34:36Z","timestamp":1701992076000},"page":"583-595","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Adaptive backstepping-extended state observer control for electrohydraulic position servo systems with multiple disturbances using the compound friction compensation"],"prefix":"10.1177","volume":"238","author":[{"given":"Xinxing","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering, Jiangsu University, Zhenjiang, 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