Two-degree-of-freedom control with tuning of both prefilter and feedforward controller

Mateo, Lorlynn A.; Sugimoto, Kenji

doi:10.1504/ijamechs.2015.074789

Cited by 3 publications

(1 citation statement)

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“…Hanif (2013) consider an active damping technique by introducing a 2-DoF PID control structure in grid connected photovoltaic systems. Mateo and Sugimoto (2015) formulated a method to tune a prefilter and the feedforward controller of the 2-DoF configuration. Vargas et al (2016) present a practical design of longitudinal stability and control augmentation system (SCAS) using a 2-DoF control scheme.…”

Section: Introductionmentioning

confidence: 99%

Optimal tracking in two-degree-of-freedom control systems: Coupled tank system

Teppa,

FAGGIONI,

GARCIA

2023

JART

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This article presents an optimal design of a two-degree-of-freedom (2-DoF) controller that will lead to zero asymptotic steady-state tracking error. The reference inputs are chosen from the set of steps, ramps, and other persistent signals used currently. The main idea is to transform the tracking 2-DoF problem into an equivalent state-space feedback-control synthesis one. Where, an internal model of the reference input is introduced. Then, through the linear quadratic regulator (LQR) technique, the desired performance objectives are addressed by minimizing a quadratic cost function. Finally, the computed state-feedback optimal gains are linked to the polynomials used within the 2-DoF formalism. The fundamental aspect of the design is that it only utilizes the measurable information of the plant provided by its inputs and outputs and take advantage of efficient state-space numerical algorithms. The proposed method is applied to a coupled-tank system, the results achieved confirm the effectiveness of the approach.

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Section: Introductionmentioning

confidence: 99%