Optimal Selection of Basis Functions for Robust Tracking Control of Uncertain Linear Systems—With Application to Three-Dimensional Printing
Optimal Selection of Basis Functions for Robust Tracking Control of Uncertain Linear Systems—With Application to Three-Dimensional Printing
复制标题
不确定线性系统鲁棒跟踪控制基函数的优化选择及其在三维打印中的应用
DOI:
10.1115/1.4051097
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Okwudire, Chinedum E.
中科院分区:
文献类型:
--
作者:
Ramani, Keval S.;Okwudire, Chinedum E.
There is growing interest in the use of the filtered basis functions (FBF) approach to track linear systems, especially nonminimum phase (NMP) plants, because of its distinct advantages compared to other tracking control methods in the literature. The FBF approach expresses the control input to the plant as a linear combination of basis functions with unknown coefficients. The basis functions are forward filtered through the plant dynamics, and the coefficients are selected such that tracking error is minimized. Similar to other feedforward control methods, the tracking accuracy of the FBF approach deteriorates in the presence of uncertainties. However, unlike other methods, the FBF approach presents flexibility in terms of the choice of the basis functions, which can be used to improve its accuracy. This paper analyzes the effect of the choice of the basis functions on the tracking accuracy of FBF, in the presence of uncertainties, using the Frobenius norm of the lifted system representation (LSR) of FBF's error dynamics. Based on the analysis, a methodology for optimal selection of basis functions to maximize robustness is proposed, together with an approach to avoid large control effort when it is applied to NMP systems. The basis functions resulting from this process are called robust basis functions. Applied experimentally to a desktop three-dimensional (3D) printer with uncertain NMP dynamics, up to 48% improvement in tracking accuracy is achieved using the proposed robust basis functions compared to B-splines, while utilizing much less control effort.
登录
查看更多内容
DOI:
10.1115/1.4044355
发表时间:
2019-11
期刊:
Journal of Dynamic Systems, Measurement, and Control
影响因子:
--
作者:
Keval S. Ramani;Molong Duan;C. Okwudire;A. Galip Ulsoy
通讯作者:
Keval S. Ramani;Molong Duan;C. Okwudire;A. Galip Ulsoy
DOI:
10.1109/tmech.2020.2983680
发表时间:
2020-10
期刊:
IEEE/ASME Transactions on Mechatronics
影响因子:
--
作者:
Keval S. Ramani;Nosakhare Edoimioya;C. Okwudire
通讯作者:
Keval S. Ramani;Nosakhare Edoimioya;C. Okwudire
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
R. Rozario;A. Fleming;T. Oomen
通讯作者:
T. Oomen
DOI:
--
发表时间:
2003
期刊:
European Control Conference
影响因子:
--
作者:
A. Faanes;S. Skogestad
通讯作者:
S. Skogestad
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Keval S. Ramani;C. Okwudire
通讯作者:
C. Okwudire