Author
Fernando J. Castillo-Garcia
Bio: Fernando J. Castillo-Garcia is an academic researcher from University of Castilla–La Mancha. The author has contributed to research in topics: PID controller & Parallel manipulator. The author has an hindex of 12, co-authored 38 publications receiving 392 citations.
Papers
More filters
TL;DR: In this article, the authors proposed a new strategy for the control of water distribution in an irrigation main canal pool characterized by large time-varying time delays using fractional order PI controllers combined with Smith predictors that yield control systems which are robust to changes in the process time delay.
65 citations
TL;DR: In this article, a simple fractional order controller combined with a Smith predictor scheme was proposed for controlling the temperature of a steel slab reheating furnace, where the preheating zone of this process was obtained from an identification procedure applied in an industrial furnace.
Abstract: This paper proposes a simple fractional order controller combined with a Smith predictor scheme for controlling the temperature of a steel slab reheating furnace. The dynamic model of the preheating zone of this process is obtained from an identification procedure applied in an industrial furnace. This identification procedure yields a second order plus time delay transfer function which undergoes large time delay changes. A fractional order integral controller combined with a Smith predictor is therefore designed. Simulated results compare the performances of the proposed fractional order controller with a standard PI controller, also combined with a Smith predictor, an LQR controller, and an H
∞ robust controller, in the case of the nominal process, and when the time delay varies. Four performance indexes have been used in this comparison: three related to the output performance (settling time, overshooting, and integral absolute error (IAE)), and a fourth one related to the control effort (TV). The analysis of these indexes shows that the simple fractional order controller provides lower values of the compared indexes when time delay becomes much higher than the nominal value.
45 citations
TL;DR: In this article, the problem of improving the connection between the fixed frame and the end-effector of planar and spatial cable-driven robots is addressed by adding reflective pulleys to the attachment between the cable and the fixed-frame.
32 citations
TL;DR: A theorem is proposed that defines the structure of the set of controllers that fulfil these specifications and shows that it is necessary for these robust controllers to include a fractional-order P I term.
30 citations
TL;DR: In this article, a robustness analysis of fractional-order PI controllers is presented by assuming a frequency domain tuning of the regulators to control a first order plus time delay plant.
26 citations
Cited by
More filters
11 Dec 2012
1,704 citations
TL;DR: This review investigates its progress since the first reported use of control systems, covering the fractional PID proposed by Podlubny in 1994, and is presenting a state-of-the-art fractionalpid controller, incorporating the latest contributions in this field.
447 citations
Book•
08 Feb 2017
TL;DR: In this article, the authors propose a method to solve the problem of "uniformity" in the form of "consistency" and "constraint" measures.
Abstract: 197
130 citations
TL;DR: The purpose of this paper is to provide a state of the art that can be easily used as a basis to familiarize oneself with fractional order tuning strategies targeted for time delayed processes.
Abstract: Several papers reviewing fractional order calculus in control applications have been published recently. These papers focus on general tuning procedures, especially for the fractional order proportional integral derivative controller. However, not all these tuning procedures are applicable to all kinds of processes, such as the delicate time delay systems. This motivates the need for synthesizing fractional order control applications, problems, and advances completely dedicated to time delay processes. The purpose of this paper is to provide a state of the art that can be easily used as a basis to familiarize oneself with fractional order tuning strategies targeted for time delayed processes. Solely, the most recent advances, dating from the last decade, are included in this review.
89 citations
TL;DR: In this article, the authors developed a new Water Quality Index focused on monitoring of shrimp farms; detecting poor water quality and preventing negative effects in the ecosystem, which assigns a priority level to each water parameter through a new analytical hierarchical process (AHP), which allows an accurate assessment of the water quality.
72 citations