scholarly journals Fractional Order Linear ADRC-Based Controller Design for Heat-Flow Experiment

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Ubaid M. Al-Saggaf ◽  
Ibrahim M. Mehedi ◽  
Rachid Mansouri ◽  
Maamar Bettayeb
Keyword(s):  
Heat Flow ◽  
Fractional Order ◽  
Controller Design ◽  
Open Loop ◽  
Order System ◽  
Order Linear ◽  
Operational Conditions ◽  
Model Free ◽  
Flow Experiment ◽  
Intuitive Concept

Fractional order control (FOC) has received widespread attention in recent years due to its efficient tuning capacity, intuitive concept, and enough flexibility. Again, FOC are known to be robust with the open loop gain in particular. However, the design of FOC demands the knowledge of the model to be modified. But on the other hand, the linear active disturbance control (LADRC) technique is known to be model free controller. In order to achieve the better tracking performance even in uncertain operational conditions by responding timely against external disturbances, these two controllers (FOC and LADRC) are combined to propose a new fractional order LADRC to handle integer order system. Therefore, FOC-based LADRC for heat-flow experiment (HFE) is designed in this paper to track desired trajectories of heat flow. Bode’s ideal transfer function is considered as an orientation model to propose this new controller while using the concept of internal mode control. A better performance of fractional order linear active disturbance control (FO-LADRC) is shown for a very good disturbance rejection capability through simulation and experiments on a heat-flow system.

scholarly journals Lead and lag controller design in fractional-order control systems

2019 ◽  
Vol 52 (7-8) ◽  
pp. 1017-1028
Author(s):  
Tufan Dogruer ◽  
Nusret Tan
Keyword(s):  
Control System ◽  
Control Systems ◽  
Fractional Order ◽  
Fourth Order ◽  
Controller Design ◽  
Design Method ◽  
Performance Criteria ◽  
Order System ◽  
Fractional Order Control ◽  
Minimum Error

This paper presents a controller design method using lead and lag controllers for fractional-order control systems. In the presented method, it is aimed to minimize the error in the control system and to obtain controller parameters parametrically. The error occurring in the system can be minimized by integral performance criteria. The lead and lag controllers have three parameters that need to be calculated. These parameters can be determined by the simulation model created in the Matlab environment. In this study, the fractional-order system in the model was performed using Matsuda’s fourth-order integer approximation. In the optimization model, the error is minimized by using the integral performance criteria, and the controller parameters are obtained for the minimum error values. The results show that the presented method gives good step responses for lead and lag controllers.

Research on identification of irrational fractional-order systems in frequency domain based on optimization algorithm

2019 ◽  
Vol 41 (15) ◽  
pp. 4351-4357
Author(s):  
Chen Lanfeng ◽  
Xue Dingyu
Keyword(s):  
Frequency Domain ◽  
Fractional Order ◽  
Optimization Algorithm ◽  
Controller Design ◽  
Order System ◽  
Model Parameters ◽  
Fractional Order Systems ◽  
Convolution Integral ◽  
Fractional Order Calculus ◽  
Frequency Domain Response

Fractional-order calculus can obtain better results than the integer-order in control theory, so it has become a research hotspot in recent years. However, the structure of the irrational fractional-order system is complex, so its theoretical analysis and controller design are more difficult. In this paper, a method based on convolution integral is proposed to obtain the frequency domain response of the irrational model. Combined with the optimization algorithm, the model parameters are identified. Moreover, the rationalization of the irrational model is realized, which facilitates the analysis and application design of this kind models. Finally, two examples are given to illustrate the effectiveness and feasibility of the method by identifying parameters and rationalization.

scholarly journals Model Decoupled Synchronization Control Design with Fractional Order Filter for H-Type Air Floating Motion Platform

Entropy ◽  
2021 ◽  
Vol 23 (5) ◽  
pp. 633
Author(s):  
Yixiu Sun ◽  
Lizhan Zeng ◽  
Ying Luo ◽  
Xiaoqing Li
Keyword(s):  
Fractional Order ◽  
Degrees Of Freedom ◽  
Control Method ◽  
Controller Design ◽  
Open Loop ◽  
System Stability ◽  
Synchronization Control ◽  
Motion Platform ◽  
Oscillation System ◽  
Filtering Method

H-type motion platform with linear motors is widely used in two-degrees-of-freedom motion systems, and one-direction dual motors need to be precisely controlled with strict synchronization for high precision performance. In this paper, a synchronous control method based on model decoupling is proposed. The dynamic model of an H-type air floating motion platform is established and one direction control using two motors with position dependency coupling is decoupled and converted into independent position and rotation controls, separately. For the low damping second-order oscillation system of the rotation control loop, a new fractional order biquad filtering method is proposed to generate an antiresonance peak to improve the phase and control gain of the open loop system, which can ensure system stability and quick attenuation for external disturbances. In the multiple-degree-of-freedom decoupled control loops, a systematic feedback controller design methodology is proposed to satisfy the given frequency domain design specifications; a feed-forward control strategy is also applied to compensate the disturbance torque caused by the platform motion. The simulation and experimental results demonstrate that the proposed synchronization control method is effective, and achieves better disturbance rejection performance than the existing optimal cancellation filtering method and biquad filtering method.

scholarly journals Design of fractional order 2-DOF PI controller for real-time control of heat flow experiment

2019 ◽  
Vol 22 (1) ◽  
pp. 215-228 ◽  
Author(s):  
Mohit Jain ◽  
Asha Rani ◽  
Nikhil Pachauri ◽  
Vijander Singh ◽  
Alok Prakash Mittal
Keyword(s):  
Heat Flow ◽  
Real Time ◽  
Fractional Order ◽  
Pi Controller ◽  
Real Time Control ◽  
Time Control ◽  
Flow Experiment

Parametric Control of IPMC Actuator Modeled as Fractional Order System

2012 ◽  
Vol 79 ◽  
pp. 63-68 ◽  
Author(s):  
Riccardo Caponetto ◽  
Salvatore Graziani ◽  
Fulvio Pappalardo ◽  
Maria Gabriella Xibilia
Keyword(s):  
Transfer Function ◽  
Physical Parameter ◽  
Influencing Factors ◽  
Fractional Order ◽  
Working Conditions ◽  
Open Loop ◽  
Order System ◽  
Control Law ◽  
Integer Order ◽  
Parametric Control

IPMC actuators suffer because of a large number of influencing factors that do not allow adequate open loop working conditions and they require the use of controlling strategies. IPMC controllers can be designed by using suitable device models. Here a non integer order transfer function is used to model IPMC actuators. In the present paper the IPMC model is scaled as a function of the actuator length and the control law has been parameterized according to this physical parameter

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