Nonlinear output‑feedback speed servo systems through active damping injection and position filtering approaches without current feedback


Vol. 22, No. 7, pp. 1199-1208, Jul. 2022
10.1007/s43236-022-00451-9




 Abstract

This paper proposes a novel current feedback-free speed regulation method for servo systems subject to system parameter and load uncertainties. The proposed solution has two features. First, the position measurement from the rotary encoder constitutes the speed and acceleration estimates for control loops through a position filter with nonlinearly-structured design parameters and without dependence on the system parameters. Second, the proposed controller only requires nominal system parameter information, and stabilizes both the speed and acceleration loops using only position measurements by injecting active damping terms, which leads to pole-zero cancellation. A prototype servo system was built using a 500 W brushless DC-motor-based dynamo. The prototype experimentally validates the effectiveness of the proposed solution in terms of speed tracking and regulation tasks.


 Statistics
Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.



Cite this article

[IEEE Style]

D. Lee, S. Kim, K. Lee, "Nonlinear output‑feedback speed servo systems through active damping injection and position filtering approaches without current feedback," Journal of Power Electronics, vol. 22, no. 7, pp. 1199-1208, 2022. DOI: 10.1007/s43236-022-00451-9.

[ACM Style]

Deog-Ho Lee, Seok-Kyoon Kim, and Kyo-Beum Lee. 2022. Nonlinear output‑feedback speed servo systems through active damping injection and position filtering approaches without current feedback. Journal of Power Electronics, 22, 7, (2022), 1199-1208. DOI: 10.1007/s43236-022-00451-9.