Tianyu Chen;Gongliu Yang;Zeyang Wen;Zhenyang Chen;Qingzhong Cai
{"title":"Modeling and Online Calibration for SINS/CNS Asynchronous Time With NFOV Star Tracker","authors":"Tianyu Chen;Gongliu Yang;Zeyang Wen;Zhenyang Chen;Qingzhong Cai","doi":"10.1109/TIM.2024.3460933","DOIUrl":null,"url":null,"abstract":"Strapdown inertial navigation system/celestial navigation system (SINS/CNS) integrated navigation with narrow-field-of-view (NFOV) star tracker is widely employed in the aviation and aerospace fields contributed by its high accuracy and autonomy. However, due to the computational cost and data transmission of CNS, the output data of CNS and SINS cannot be completely synchronized, which seriously affects the performance of integrated navigation, particularly in highly dynamic environments. To solve the problem above, this article constructs a model and proposes an online calibration method for the asynchronous time between the outputs from SINS and CNS with NFOV star tracker. First, the error characteristic of SINS/CNS asynchronous time is analyzed, and the imaging detection is revealed to be significantly affected by the SINS/CNS asynchronous time in dynamic environments. Additionally, on the basis of the error characteristic analysis, a corresponding error model is established. Finally, an online calibration scheme of SINS/CNS asynchronous time is designed based on the backtracking navigation algorithm. Simulations and field experiments show that the online calibration method works well in calibrating the SINS/CNS asynchronous time and compensating for the tri-axis attitude misalignment angles of the SINS, affirming the efficacy and feasibility of the established model and proposed calibration method in this article.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":null,"pages":null},"PeriodicalIF":5.6000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Instrumentation and Measurement","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10684476/","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Strapdown inertial navigation system/celestial navigation system (SINS/CNS) integrated navigation with narrow-field-of-view (NFOV) star tracker is widely employed in the aviation and aerospace fields contributed by its high accuracy and autonomy. However, due to the computational cost and data transmission of CNS, the output data of CNS and SINS cannot be completely synchronized, which seriously affects the performance of integrated navigation, particularly in highly dynamic environments. To solve the problem above, this article constructs a model and proposes an online calibration method for the asynchronous time between the outputs from SINS and CNS with NFOV star tracker. First, the error characteristic of SINS/CNS asynchronous time is analyzed, and the imaging detection is revealed to be significantly affected by the SINS/CNS asynchronous time in dynamic environments. Additionally, on the basis of the error characteristic analysis, a corresponding error model is established. Finally, an online calibration scheme of SINS/CNS asynchronous time is designed based on the backtracking navigation algorithm. Simulations and field experiments show that the online calibration method works well in calibrating the SINS/CNS asynchronous time and compensating for the tri-axis attitude misalignment angles of the SINS, affirming the efficacy and feasibility of the established model and proposed calibration method in this article.
期刊介绍:
Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications. The scope of these papers may encompass: (1) theory, methodology, and practice of measurement; (2) design, development and evaluation of instrumentation and measurement systems and components used in generating, acquiring, conditioning and processing signals; (3) analysis, representation, display, and preservation of the information obtained from a set of measurements; and (4) scientific and technical support to establishment and maintenance of technical standards in the field of Instrumentation and Measurement.