{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,19]],"date-time":"2025-09-19T07:43:48Z","timestamp":1758267828703,"version":"3.38.0"},"reference-count":29,"publisher":"SAGE Publications","issue":"13","license":[{"start":{"date-parts":[[2017,10,9]],"date-time":"2017-10-09T00:00:00Z","timestamp":1507507200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Transactions of the Institute of Measurement and Control"],"published-print":{"date-parts":[[2018,9]]},"abstract":"<jats:p> Temperature control in a cryogenic wind tunnel is the key to realizing finely controlled Reynolds number close to true flight. This study deploys the L<jats:sub>1<\/jats:sub> adaptive control methodology to ensure the total temperature profile of the cryogenic wind tunnel tracks a specified reference trajectory. After introducing a non-linear model of a cryogenic wind tunnel and a linear temperature model, a linear\u2013quadratic\u2013Gaussian (LQG) controller is implemented as the baseline controller. The L<jats:sub>1<\/jats:sub> adaptive controller with piecewise constant adaptive law is used as an augmentation to the baseline controller to cancel the matched and unmatched uncertainties within the actuator\u2019s bandwidth. By introducing two modifications to the standard L<jats:sub>1<\/jats:sub> adaptive controller, which are the transportation delay modelling in the state predictor and the non-linear state dependent filter, the L<jats:sub>1<\/jats:sub> adaptive controller improves the performance of the baseline controller in the presence of uncertainties in temperature control, guaranteeing proper stability and delay margin. The simulation results and analysis demonstrate the effectiveness of the proposed control architecture. The main contribution of this paper lies in the first applications of L<jats:sub>1<\/jats:sub> adaptive control to the wind tunnel control problem and the non-linear state dependent filter in L<jats:sub>1<\/jats:sub> adaptive control structure. <\/jats:p>","DOI":"10.1177\/0142331217728569","type":"journal-article","created":{"date-parts":[[2017,10,9]],"date-time":"2017-10-09T11:13:07Z","timestamp":1507547587000},"page":"3675-3689","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":10,"title":["Temperature trajectory control of cryogenic wind tunnel with robust L<sub>1<\/sub> adaptive control"],"prefix":"10.1177","volume":"40","author":[{"given":"Rusong","family":"Zhu","sequence":"first","affiliation":[{"name":"School of Manufacturing Science and Engineering, Sichuan University, Chengdu, China"},{"name":"China Aerodynamics Research and Development Center, Mianyang, China"}]},{"given":"Guofu","family":"Yin","sequence":"additional","affiliation":[{"name":"School of Manufacturing Science and Engineering, Sichuan University, Chengdu, China"}]},{"given":"Gengsheng","family":"Tang","sequence":"additional","affiliation":[{"name":"China Aerodynamics Research and Development Center, Mianyang, China"}]},{"given":"Hai","family":"Wang","sequence":"additional","affiliation":[{"name":"China Aerodynamics Research and Development Center, Mianyang, China"}]},{"given":"Shuangxi","family":"Zhang","sequence":"additional","affiliation":[{"name":"China Aerodynamics Research and Development Center, Mianyang, China"}]}],"member":"179","published-online":{"date-parts":[[2017,10,9]]},"reference":[{"key":"bibr1-0142331217728569","unstructured":"Balakrishna S, Goglia G (1979) Synthesis of a control model for a liquid nitrogen cooled, closed circuit, cryogenic nitrogen wind tunnel and its validation. 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