Fuzzy Gain-Scheduling Proportional–Integral control for Improving the speed behavior of a three-phases induction motor

2016 ◽  
Vol 7 (4) ◽  
pp. 1161
Author(s):  
Hichem Othmani ◽  
D. Mezghani ◽  
A. Mami
Keyword(s):  
Transfer Function ◽  
Induction Machine ◽  
Gain Scheduling ◽  
Pi Controller ◽  
Integral Control ◽  
Proportional Integral ◽  
Integral Controller ◽  
Proportional Integral Controller ◽  
Proportional Integral Control ◽  
Set Up

In this article, we have set up a vector control law of induction machine where we tried different type of speed controllers. Our control strategy is of type Field Orientated Control (FOC). In this structure we designed a Fuzzy Gain-Scheduling Proportional–Integral (Pi) controller to obtain best result regarding the speed of induction machine. At the beginning we designed a Pi controller with fixed parameters. We came up to these parameters by identifying the transfer function of this controller to that of Broïda (second order transfer function). Then we designed a fuzzy logic (FL) controller. Based on simulation results, we highlight the performances of each controller. To improve the speed behaviour of the induction machine, we have designend a controller called “Fuzzy Gain-Scheduling Proportional–Integral controller” (FGS-PI controller) which inherited the pros of the aforementioned controllers. The simulation result of this controller will strengthen its performances.

Robustly stabilizing proportional integral controller for uncertain system under computational delay

2020 ◽  
pp. 107754632095792
Author(s):  
Sahaj Saxena ◽  
Yogesh V Hote
Keyword(s):  
Stability Boundary ◽  
Parametric Uncertainty ◽  
Uncertain System ◽  
Regulatory Control ◽  
Integral Control ◽  
Proportional Integral ◽  
Integral Controller ◽  
Proportional Integral Controller ◽  
Proportional Integral Control ◽  
The Stability

In a feedback control loop, when there exists a delay in processing the control signal (often called computational delay), it is difficult to stabilize the system, particularly when the system exhibits uncertainty. To solve this problem, we proposed a new robust proportional integral control strategy for a class of uncertain systems exhibiting parametric uncertainty. A two-stage scheme is proposed in which the first stage identifies the worst plant that has the highest chance of facing instability; and in the second stage, based on the worst plant, the tuning parameters of the proportional integral controller are determined using the stability boundary locus approach under the desired closed-loop specifications of gain and phase margins. The efficiency of the proposed scheme is verified for servo and regulatory control problems.

scholarly journals Back Electro Motive Force Estimation Method for Cascade Proportional Integral Control in Permanent Magnet Synchronous Motors

Actuators ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 319
Author(s):  
Jeonghwan Gil ◽  
Sesun You ◽  
Youngwoo Lee ◽  
Wonhee Kim
Keyword(s):  
Permanent Magnet ◽  
Force Constant ◽  
Motive Force ◽  
Permanent Magnet Synchronous Motors ◽  
Integral Control ◽  
Proportional Integral ◽  
Integral Controller ◽  
Proportional Integral Controller ◽  
Proportional Integral Control ◽  
Electro Motive Force

A cascade proportional integral control method with back-electro motive force compensation has been widely used for permanent magnet synchronous motors. In the permanent magnet synchronous motor control, it is important to accurately know the back-electro motive force constant for torque generation as well as back-electro motive force compensation. In this study, a real-time back-electro motive force constant estimation algorithm is developed to improve the velocity tracking control performance. The proposed method consists of a proportional integral controller and a back-electro motive force constant estimator. The proportional integral controller is designed to reduce the velocity tracking error. The back-electro motive force constant estimator is designed to estimate the back-electro motive force constant. It was verified that the estimated back-electro motive force constant converges to the actual back-electro motive force constant. The estimated back-electro motive force constant is applied to the cascade proportional integral controller. To verify the effectiveness of the proposed method, the performance of the proposed method is validated experimentally.

scholarly journals Daytime/Nighttime Event-Based PI Control for the pH of a Microalgae Raceway Reactor

Processes ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 247 ◽  
Author(s):  
Enrique Rodríguez-Miranda ◽  
Manuel Beschi ◽  
José Luis Guzmán ◽  
Manuel Berenguel ◽  
Antonio Visioli
Keyword(s):  
Control Strategy ◽  
Pi Controller ◽  
Process Approach ◽  
Pi Control ◽  
Proportional Integral ◽  
Gas Consumption ◽  
Integral Controller ◽  
Proportional Integral Controller ◽  
Raceway Reactor ◽  
Event Based

In this paper, a new solution to improve the traditional control operation of raceway microalgae reactors is presented. The control strategy is based on an event-based method that can be easily coupled to a classical time-driven proportional-integral controller, simplifying the design process approach. The results of a standard Proportional-Integral (PI) controller, as well as of two event-based architectures, are presented in simulation and compared with each other and with traditional On/Off control. It is demonstrated that the event-based PI controller—operating during the whole day instead of only during daytime—achieves a better performance by reducing the actuator effort and saving costs related to gas consumption.

scholarly journals Evaluation of SIPIC01 and SIPIC02 on Motor Speed Control

2018 ◽  
Vol 152 ◽  
pp. 02010
Author(s):  
Kah Kit Wong ◽  
Choon Lih Hoo ◽  
Mohd Hardie Hidayat Mohyi
Keyword(s):  
Control System ◽  
Steady State ◽  
Dynamic Performance ◽  
Pi Controller ◽  
Settling Time ◽  
Motor Speed ◽  
Proportional Integral ◽  
Integral Controller ◽  
Proportional Integral Controller ◽  
Decoupling Effect

Due to its simplicity, Proportional-Integral (PI) controller still remains as the widely used controller for motor speed control system. However, PI controller exhibits windup phenomenon when the motor operates in a saturated state, which may cause degradation to the control system. In order to overcome the windup phenomenon, many researches have introduced various types of anti-windup methods such as the Conditioning Technique (CI), Tracking Back Calculation (TBC), Integral State Prediction (ISP), Steady-state Integral Proportional Integral Controller-01 (SIPIC01) and Steady-state Integral Proportional Integral Controller-02 (SIPIC02). These are anti-windup techniques with integral control switching mechanism, coupling of proportional gain, kp, and integral gain, ki. Due to the coupled kp and ki, tuning motor performance is a difficult task with short settling time without experiencing overshoot. SIPIC01 and SIPIC02 are robust anti-windup methods without a switching mechanism and exhibit decoupling feature. SIPIC01 and SIPIC02 have shown better dynamic performance compared to CI, TBC and ISP. However, SIPIC01 has not been compared to SIPIC02 in terms of their decoupling effect flexibility and dynamic performance. The decoupling effect was verified using MATLAB simulation, while the performance analysis was verified through hardware simulation and testing by using Scilab. The results obtained from the simulation showed that both SIPIC01 and SIPIC02 consist of decoupling features that allow a performance with coexistence of zero or minimum overshoot with short settling time. However, SIPIC02 consists of longer rise and settling time as compared to SIPIC01. Therefore, it can be concluded that SIPIC01 is better than SIPIC02 in term of dynamic performance.

Design and experimental evaluation of feedforward controller integrating filtered-x LMS algorithm with applications to electro-hydraulic force control systems

2015 ◽  
Vol 230 (12) ◽  
pp. 1951-1967 ◽  
Author(s):  
Yu Tang ◽  
Zhencai Zhu ◽  
Gang Shen
Keyword(s):  
Transfer Function ◽  
Control Systems ◽  
Force Control ◽  
Adaptive Controller ◽  
Tracking Performance ◽  
Lms Algorithm ◽  
Proportional Integral ◽  
Integral Controller ◽  
Feedforward Controller ◽  
Proportional Integral Controller

The control purpose of an electro-hydraulic force control (EHFC) system is to real time replicate the force exerted on a structure in laboratory so as to simulate loads that cannot otherwise be generated naturally. In contrast to electro-hydraulic position control system, the tracking performance of EHFC system is always limited. To enhance the force replication accuracy of EHFC systems, a feedforward inverse controller integrating filtered-x LMS adaptive algorithm is presented in this paper. The proposed controller comprises a feedforward inverse controller and an adaptive controller. The feedforward inverse controller working as an inner loop is firstly established by directly cascading the designed parametric inverse transfer function to the EHFC system with proportional integral controller and the inverse transfer function is obtained with the implementation of system identification and zero magnitude error tracking technology. Then, the adaptive controller employing the filtered-x LMS algorithm acting as an outer loop is further combined with the feedforward controller to deal with the error occurred in the inverse model design procedure. Therefore, the proposed controller is an easy-to-implement strategy and can effectively enhance the force replication performance for both phase delay errors and amplitude mismatch errors. Finally, a series of experiments are carried out on a real EHFC test rig by means of xPC target technology, and the experimental results indicate that the proposed controller has a relatively better tracking accuracy compared with the proportional integral controller and the feedforward controller. It is also worth noting that the proposed controller can also be extended to other servo control systems where high accuracy tracking performance is required.

scholarly journals A biomolecular proportional integral controller based on feedback regulations of protein level and activity

2018 ◽  
Vol 5 (2) ◽  
pp. 171966 ◽  
Author(s):  
Francis Mairet
Keyword(s):  
Redox Regulation ◽  
Feedback System ◽  
Pi Controller ◽  
Ammonium Uptake ◽  
Proportional Integral ◽  
Perfect Adaptation ◽  
Classical Integral ◽  
Integral Controller ◽  
Proportional Integral Controller ◽  
Living Organisms

Homeostasis is the capacity of living organisms to keep internal conditions regulated at a constant level, despite environmental fluctuations. Integral feedback control is known to play a key role in this behaviour. Here, I show that a feedback system involving transcriptional and post-translational regulations of the same executor protein acts as a proportional integral (PI) controller, leading to enhanced transient performances in comparison with a classical integral loop. Such a biomolecular controller—which I call a level and activity-PI controller (LA-PI)—is involved in the regulation of ammonium uptake by Escherichia coli through the transporter AmtB. The P II molecules, which reflect the nitrogen status of the cell, inhibit both the production of AmtB and its activity (via the NtrB-NtrC system and the formation of a complex with GlnK, respectively). Other examples of LA-PI controller include copper and zinc transporters, and the redox regulation in photosynthesis. This scheme has thus emerged through evolution in many biological systems, surely because of the benefits it offers in terms of performances (rapid and perfect adaptation) and economy (protein production according to needs).

RESEARCH OF BRIDGE CURRENT AMPLIFIER WITH PI CONTROLLER

2019 ◽  
Author(s):  
Sergey Chumarov ◽  
V. Chernov
Keyword(s):  
Pi Controller ◽  
Circuit Diagram ◽  
Simulation Program ◽  
Integral Control ◽  
Current Amplifier ◽  
Proportional Integral ◽  
Device Model ◽  
Proportional Integral Control

A bridge current amplifier with proportional integral control was studied, a circuit diagram was built in the simulation program, and its modeling was carried out. On the basis of the results suggests the possibility of the device model.

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