scholarly journals Robust Control of Steam Turbine System Speed Using Improved IMC Tuned PID Controller

2012 ◽  
Vol 38 ◽  
pp. 1450-1456 ◽  
Author(s):  
M.V. Subramanyam ◽  
K. Satya Prasad ◽  
P.V. Gopi Krishna Rao
Keyword(s):  
Robust Control ◽  
Steam Turbine ◽  
Pid Controller

scholarly journals PID gain tuning for Robust Control of PMDC Motor with tracking and disturbance rejection through H∞

2019 ◽  
Vol 9 (1) ◽  
pp. 4097-4102
Keyword(s):  
Robust Control ◽  
Disturbance Rejection ◽  
Pid Controller ◽  
High Efficiency ◽  
Controller Design ◽  
Low Cost ◽  
Optimization Approach ◽  
Industrial Control ◽  
Control Approach ◽  
Pid Controller Design

Permanent-magnet (PM) motors are employed in numerous industrial control applications for their high efficiency, simple mechanism and low cost. In most of the applications, either the plant model is inaccurately defined or the plant parameters are prone to variations over period of time. Also, in most of the applications, have a requirement of good tracking as well as good disturbance rejection, two competing requirements. The controller should cater to the parameter variations as well as provide robust performance against external disturbances and hence requires a robust control approach towards designing a controller. A classical PID controller, which lacks robustness requirements is augmented by H∞ optimization based gain tuning to meet the robustness requirements. This paper discusses a PID controller design using H∞ optimization approach. Different performance goals for tracking and disturbance rejection are defined and PID gains are tuned to meet the goals in H∞ sense. A commercial Maxon RE35 motor is selected for modeling and simulation

scholarly journals Robust Control for a 3DOF Articulated Robotic Manipulator Joint Torque under Uncertainties

2020 ◽  
pp. 1-13
Author(s):  
Chukwudi Emmanuel Agbaraji ◽  
Uchenna Henrietta Udeani ◽  
Hyacinth Chibueze Inyiama ◽  
Christiana Chikodi Okezie
Keyword(s):  
Robust Control ◽  
Pid Controller ◽  
Research Work ◽  
Robotic Manipulator ◽  
Torque Control ◽  
Joint Torque ◽  
Low Frequencies ◽  
H Infinity ◽  
Stability Robustness ◽  
Peak Sensitivity

This research work emphasizes on design of a robust control for a 3DOF robotic manipulator under uncertainties. The plant model was achieved using the independent joint method and the uncertainty problem was addressed by designing a robust controller using H-Infinity synthesis which was compared with PID. This was achieved with algorithms implemented in MATLAB. The H-Infinity controller recorded 0dB, while PID controller recorded 0.117dB and 0.061dB for joints I and II respectively in Complementary Sensitivity (T) graph at low frequencies. H-Infinity controller achieved better disturbance rejection characteristics with sensitivity (S) graph recording peak sensitivity of 0.817dB and 1.79dB at joints I and II respectively than PID controller which achieved 3dB and 1.86dB at joints I and II respectively. H-Infinity controller achieved better noise rejection characteristics with T graph recording lower gains at joints I and II respectively at high frequencies than PID controller which recorded higher gains at joints I and II respectively. Thus, it was concluded that the H-Infinity controller achieved better performance and stability robustness characteristics for the joint torque control than the PID.

Travel Angle Control of Quanser Bench-top Helicopter based on Quantitative Feedback Theory Technique

2016 ◽  
Vol 1 (2) ◽  
pp. 310 ◽  
Author(s):  
A. H. Mohd Hairon ◽  
H. Mansor ◽  
T. S. Gunawan ◽  
S. Khan
Keyword(s):  
Robust Control ◽  
Flight Control ◽  
Pid Controller ◽  
Dynamic Control ◽  
Control Technique ◽  
Quantitative Feedback Theory ◽  
Linear Behavior ◽  
Aerial Vehicle ◽  
Three Degree Of Freedom ◽  
Theory Technique

<p>A three degree of freedom (3-DOF) bench-top helicopter is a simplified aerial vehicle which is used to study the behaviors of the helicopter as well as testing multiple flight control approaches for their efficiency. Designing helicopter’s dynamic control is a challenging task due to the presence of high uncertainties and non-linear behavior. The main objective of this research is to achieve robust control over the helicopter model regardless parameter variation and disturbances using robust control technique, Quantitative Feedback Theory (QFT). QFT utilizes frequency domain methodology which ensures plant’s stability by considering the feedback of the system and thus removing the effect of disturbances and reducing sensitivity of parameter’s variation. The proposed technique is tested against LQR-tuned PID controller in both simulation and real hardware environment to verify its performance. The results obtained shown us that QFT algorithm managed to reduce settling time and steady state error of about 80% and 33% respectively over the classical PID controller.</p>

Research of a Robust Control for Electro Hydraulic Servo System

2014 ◽  
Vol 986-987 ◽  
pp. 1103-1107
Author(s):  
Xiao Gang Tang ◽  
Chao Zhang
Keyword(s):  
Robust Control ◽  
Pid Control ◽  
Pid Controller ◽  
Manufacturing Industry ◽  
The Novel ◽  
Servo Systems ◽  
Novel Approach ◽  
Aerospace Manufacturing ◽  
Control Scheme ◽  
Hydraulic Servo

In recent years, electro hydraulic servo systems are more and more widely used in the aerospace, manufacturing industry and the agricultural machinery. As a result, higher requirements are put forward for the performance and application environment, including better tracking precision and respond speed. Aiming at the shortcomings of conventional PID controller, such as the large overshoot, long transfer time and poor robustness performance, a robust control scheme with dual-loop structure is proposed in this paper. Simulation results show that better performances are acquired in the novel approach in contrast with the PID control scheme and the structure of the proposed scheme is simple and easy to implement.

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