{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:58:11Z","timestamp":1760237891939,"version":"build-2065373602"},"reference-count":40,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2020,6,26]],"date-time":"2020-06-26T00:00:00Z","timestamp":1593129600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"the National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51475377","51375394"],"award-info":[{"award-number":["51475377","51375394"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>In the process of composite placement, irregularity and asymmetry pressure fluctuation will affect the density and evenness of composite products, which lead to the inconsistency of interfacial strength and fiber volume fraction. The dynamic performance of placement pressure systems will be affected by external disturbance, mechanism friction and measurement noise. In this paper, an adaptive sliding mode control (ASMC) strategy based on disturbance observer (DOB) is proposed. The disturbance observer is introduced to estimate the equivalent disturbance torque, and the estimation error is compensated by the switching term of sliding mode control. The adaptive method is used to ensure that the switching gain is not overestimated, and then the Lyapunov function is used to verify the stability of the closed-loop control system. The experimental results and simulation analysis show that ASMC-DOB has high control accuracy and good robustness. At the same time, the designed algorithm can effectively reduce the void content of composite products.<\/jats:p>","DOI":"10.3390\/sym12061057","type":"journal-article","created":{"date-parts":[[2020,6,26]],"date-time":"2020-06-26T05:19:36Z","timestamp":1593148776000},"page":"1057","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Adaptive Sliding Mode Control Based on Disturbance Observer for Placement Pressure Control System"],"prefix":"10.3390","volume":"12","author":[{"given":"Qi","family":"Hong","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3227-6525","authenticated-orcid":false,"given":"Yaoyao","family":"Shi","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhen","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,6,26]]},"reference":[{"key":"ref_1","first-page":"106","article-title":"A review of carbon car bon composites for engineering applications","volume":"30","author":"Su","year":"2015","journal-title":"New Carbon Mater."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1016\/j.compositesb.2013.02.043","article-title":"Multidisciplinary characterization of new shield with metallic nanoparticles or composite aircrafts","volume":"50","author":"Jalali","year":"2013","journal-title":"Compos. 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