部分空間同定法を用いた時変システムの次数・パラメータ推定に関する一考察 A Study on Order and Parameter Estimation of Time-Varying System by Subspace Method

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This paper proposes an identification algorithm for time-varying system. We apply subspace method for estimation, since it is known as useful when the input-output (I/O) data are observed by multi-input multi-output (MIMO) system. Among many proposed techniques of subspace methods, we use MOESP (MIMO Output-Error State Space Model Identification) in this paper, which assures arithmetic stability by RQ-factorization and singular-value decomposition (SVD). Generally, subspace methods can be applied after I/O data collection, so that we introduce updated steps of matrices for PI-MOESP, which uses past inputs for instrumental variables. We propose recursive update algorithm of PI-MOESP, including estimation step of the system order, and consider some parameters inherent to the algorithm, those are initial number of data, estimation step of the order and forgetting factor. Numerical example shows usefulness of the proposed method.

収録刊行物

  • 電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society

    電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society 124(7), 1455-1461, 2004-07-01

    一般社団法人 電気学会

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各種コード

  • NII論文ID(NAID)
    10013268231
  • NII書誌ID(NCID)
    AN10065950
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03854221
  • NDL 記事登録ID
    7020308
  • NDL 雑誌分類
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL 請求記号
    Z16-795
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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