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Novel quantized iterative learning control based on spherical polar coordinates
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DOI：10.1002/rnc.7424.png)
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This study investigates the iterative learning control method for discrete-time systems with data quantization, and it employs a quantizer based on spherical polar coordinates. The quantizer uses spherical polar coordinates to transform an unquantized signal into one with a predetermined quantization level. The quantization capability is dependent on the size of the support sphere, which is dynamically adjustable. In the scenarios of system output quantization, general quantization, and tracking error quantization, the learning control schemes are developed with consideration of the smallest sphere quantization features. The radii of the support spheres are designed independently based on the characteristics of the quantized signals (system output, control input, tracking error). The findings suggest that the system can achieve a bounded error convergence in the scenarios of system output and general quantization. In the context of quantization in tracking error, it is achievable to attain tracking performance with zero error. The example of a permanent magnet synchronous motor is provided to illustrate the findings of the study.
Keyword:
data quantization
iterative learning control
spherical polar coordinates
期刊
IF:
3.2
论文数:
7.0K
被引数:
1.4W
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