{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,8]],"date-time":"2025-11-08T13:15:56Z","timestamp":1762607756017,"version":"build-2065373602"},"reference-count":47,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2020,2,5]],"date-time":"2020-02-05T00:00:00Z","timestamp":1580860800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61873295","61833016","61622308","61933010"],"award-info":[{"award-number":["61873295","61833016","61622308","61933010"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This study is concerned with the attitude control problem of variable-structure near-space vehicles (VSNSVs) with time-varying state constraints based on switched nonlinear system. The full states of vehicles are constrained in the bounded sets with asymmetric time-varying boundaries. Firstly, considering modeling uncertainties and external disturbances, an extended state observer (ESO), including two distinct linear regions, is proposed with the advantage of avoiding the peaking value problem. The disturbance observer is utilized to estimate the total disturbances of the attitude angle and angular rate subsystems, which are described in switched nonlinear systems. Then, based on the estimation values, the asymmetric time-varying barrier Lyapunov function (BLF) is employed to construct the active disturbance rejection controller, which can ensure the full state constraints are not violated. Furthermore, to resolve the \u2018explosion of complexity\u2019 problem in backstepping control, a modified dynamic surface control is proposed. Rigorous stability analysis is given to prove that all signals of the closed-loop system are bounded. Numerical simulations are carried out to demonstrate the effectiveness of the proposed control scheme.<\/jats:p>","DOI":"10.3390\/s20030848","type":"journal-article","created":{"date-parts":[[2020,2,6]],"date-time":"2020-02-06T02:59:18Z","timestamp":1580957958000},"page":"848","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Variable-Structure Near-Space Vehicles with Time-Varying State Constraints Attitude Control Based on Switched Nonlinear System"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4399-8187","authenticated-orcid":false,"given":"Cong","family":"Feng","sequence":"first","affiliation":[{"name":"Department of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China"}]},{"given":"Qing","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China"}]},{"given":"Chen","family":"Liu","sequence":"additional","affiliation":[{"name":"Science and Technology on Special System Simulation Laboratory, Beijing Simulation Center, Beijing 100854, China"}]},{"given":"Changhua","family":"Hu","sequence":"additional","affiliation":[{"name":"Department of Automation, High-Tech Institute of Xi\u2019an, Xi\u2019an 710000, China"}]},{"given":"Xiaohui","family":"Liang","sequence":"additional","affiliation":[{"name":"Department of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China"}]}],"member":"1968","published-online":{"date-parts":[[2020,2,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"829","DOI":"10.2514\/1.12596","article-title":"Adaptive sliding mode control design for a hypersonic flight vehicle","volume":"27","author":"Xu","year":"2004","journal-title":"J. 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