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Feed-Forward Compensation of Non-Minimum Phase Systems

Dudiki, Venkatesh
http://orcid.org/0000-0001-5335-2999
http://rave.ohiolink.edu/etdc/view?acc_num=wright1545163596477852

Abstract Details

2018, Master of Science in Electrical Engineering (MSEE), Wright State University, Electrical Engineering.
Due to inherent limitations posed by existence of zeros of a transfer function in the righthalf of the complex plane, known as non-minimum phase zeros, the issue of dealing with such zeros is extremely important in control of linear systems. Considerable literature exists in control theory to try and minimize or eliminate the effect of non-minimum phase zeros. These include pole-zero cancellation, feedforward compensation, among others. These methods are only limited only to stable systems (systems with poles in the left half of the complex plane); and will fail for systems that are unstable as well as non-minimum phase. This research focuses in designing feedforward compensators for unstable as well as non-minimum phase. The key contribution is to decompose the transfer function of a Single-Input Single-Output system into two sub-systems: a stable but non-minimum phase subsystems and an unstable but minimum-phase subsystem. Then using root-locus techniques, the non-minimum phase zeros can be shifted to the left half plane, rendering the system minimum phase. Control techniques such as adaptive PID, model-reference control, which are not possible to implement on non-minimum phase systems can now be implemented on the resulting system. Simulations were performed in MATLAB/Simulink to validate the proposed compensation scheme.
Pradeep Misra, Ph.D. (Advisor)
Luther Palmer III, Ph.D. (Committee Member)
Marian K. Kazimierczuk, Ph.D. (Committee Member)
46 p.
Electrical Engineering
non-minimum phase zeros; control theory; feed forward compensation

Recommended Citations

Citations

  • Dudiki, V. (2018). Feed-Forward Compensation of Non-Minimum Phase Systems [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1545163596477852

    APA Style (7th edition)

  • Dudiki, Venkatesh. Feed-Forward Compensation of Non-Minimum Phase Systems. 2018. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1545163596477852.

    MLA Style (8th edition)

  • Dudiki, Venkatesh. "Feed-Forward Compensation of Non-Minimum Phase Systems." Master's thesis, Wright State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1545163596477852

    Chicago Manual of Style (17th edition)

wright1545163596477852
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© 2018, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.