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Predictive compensation based quantization iterative learning control for nonlinear nonaffine discrete-time systems
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DOI：10.1002/rnc.6445.png)
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In this work, the problems of predictive compensation, unknown nonlinearity, and nonaffine structure are considered simultaneously for a quantized iterative learning control (QILC) design and analysis under a data-driven framework. The compensation strategy can avoid deteriorated data transmission quality owing to limited channel capacities. First, a dynamic linearization methodology is employed to transform the nonlinear plant into a virtual iterative linear data model (iLDM) which includes all the input signals over a time-window from the initial time instant to the current one. The iLDM is also used as a predictive model to estimate the unavailable information caused by the encoding-decoding mechanism. Then, a predictive compensation-based QILC is proposed by optimizing quadratic functions, which includes an output prediction mechanism, a quantized iterative learning updating law, a quantized iterative parameter estimation law, and a resetting algorithm. The result is also extended to a class of MIMO nonlinear nonaffine discrete-time systems. The developed control laws are data-driven and independent of any system information. The theoretical results are proved by the use of contraction mapping principle and induction method. Examples are provided to verify the effectiveness of the proposed methods.
Keyword:
encoding-decoding mechanism
nonlinear nonaffine systems
predictive compensation
quantized error
quantized iterative learning control
期刊
IF:
3.2
论文数:
7.0K
被引数:
1.4W
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