کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
689815 | 889642 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced process activation method to remove harmonics and input nonlinearity
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Enhanced process activation method to remove harmonics and input nonlinearity Enhanced process activation method to remove harmonics and input nonlinearity](/preview/png/689815.png)
چکیده انگلیسی
A new closed-loop process activation method is proposed to reduce the harmonics and obtain more accurate frequency data compared with the previous methods. It has another advantage that the effect of the input nonlinearity can be removed by the proposed method combined with disturbance rejection techniques. The proposed method combines 10 pulses to generate one period of the relay signal. The 10 pulses are combined in an optimal way by solving a constrained nonlinear optimization problem to reduce the harmonics as much as possible. In the implementation step, this study uses the obtained optimal solution without continuing to solve the optimization problem. So, the implementation is almost as simple as that of the previous methods. The proposed method shows significantly smaller harmonics compared with the conventional relay feedback method. The previous approaches, which use a sinusoidal signal, multi-step signal, saturation-relay signal or preload relay signal to reduce the harmonics, cannot manipulate the input nonlinearity. However, the proposed method can estimate the frequency data set of the process effectively for the case where the process has an input nonlinearity because the proposed method uses pulse signals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Process Control - Volume 19, Issue 2, February 2009, Pages 353-357
Journal: Journal of Process Control - Volume 19, Issue 2, February 2009, Pages 353-357
نویسندگان
Cheol Ho Je, Jietae Lee, Su Whan Sung, Dong Hyun Lee,