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10 Results Found

  • Article
  • Open Access
26 Citations
3,890 Views
26 Pages

15 February 2021

In this paper, a novel Virtual State-feedback Reference Feedback Tuning (VSFRT) and Approximate Iterative Value Iteration Reinforcement Learning (AI-VIRL) are applied for learning linear reference model output (LRMO) tracking control of observable sy...

  • Feature Paper
  • Article
  • Open Access
31 Citations
6,489 Views
15 Pages

Virtual Reference Feedback Tuning of Model-Free Control Algorithms for Servo Systems

  • Raul-Cristian Roman,
  • Mircea-Bogdan Radac,
  • Radu-Emil Precup and
  • Emil M. Petriu

24 October 2017

This paper proposes the combination of two data-driven techniques, namely virtual reference feedback tuning (VRFT) and model-Free Control (MFC) in terms of the VRFT of MFC algorithms dedicated to servo systems. VRFT ensures the automatic optimal comp...

  • Article
  • Open Access
374 Views
18 Pages

Control of a Scenedesmus obliquus UTEX 393 Microalgae Culture Using Virtual Reference Feedback Tuning

  • Álvaro Pulido-Aponte,
  • Claudia L. Garzón-Castro and
  • Santiago Díaz-Bernal

4 January 2026

Microalgae are photosynthetic microorganisms capable of fixing CO2 to produce O2 and a wide variety of metabolites of interest. Attempts have been made to describe their growth dynamics using mathematical models; however, these models fail to fully r...

  • Article
  • Open Access
3 Citations
2,949 Views
22 Pages

20 October 2023

Data-driven controller synthesis methods use input/output information to find the coefficients of a proposed control architecture. Virtual Reference Feedback Tuning (VRFT) is one of the most popular frameworks due to its simplicity and one-shoot synt...

  • Article
  • Open Access
14 Citations
3,067 Views
25 Pages

31 December 2021

This paper focuses on validating a model-free Value Iteration Reinforcement Learning (MFVI-RL) control solution on a visual servo tracking system in a comprehensive manner starting from theoretical convergence analysis to detailed hardware and softwa...

  • Article
  • Open Access
46 Citations
5,387 Views
24 Pages

30 April 2019

This paper proposes a neural network (NN)-based control scheme in an Adaptive Actor-Critic (AAC) learning framework designed for output reference model tracking, as a representative deep-learning application. The control learning scheme is model-free...

  • Article
  • Open Access
36 Citations
5,901 Views
18 Pages

Data-Driven Adaptive Control for Laser-Based Additive Manufacturing with Automatic Controller Tuning

  • Lequn Chen,
  • Xiling Yao,
  • Youxiang Chew,
  • Fei Weng,
  • Seung Ki Moon and
  • Guijun Bi

10 November 2020

Closed-loop control is desirable in direct energy deposition (DED) to stabilize the process and improve the fabrication quality. Most existing DED controllers require system identifications by experiments to obtain plant models or layer-dependent ada...

  • Article
  • Open Access
10 Citations
2,444 Views
23 Pages

28 June 2022

A hierarchical learning control framework (HLF) has been validated on two affordable control laboratories: an active temperature control system (ATCS) and an electrical rheostatic braking system (EBS). The proposed HLF is data-driven and model-free,...

  • Article
  • Open Access
11 Citations
9,371 Views
17 Pages

This article is concerned with digital, multimodal feedback that supports learning and assessment within education. Drawing on the research literature alongside a case study from a postgraduate program in digital education, I argue that approaching f...

  • Article
  • Open Access
2 Citations
2,117 Views
26 Pages

2 September 2022

The aim of this study is to develop an adaptive automatic control method for solving the trajectory tracking problem for a biped robotic device (BRD) and taking into account that each articulation is mobilized by a linear actuator. Each extremity of...