Internal Model Principle Method to Robust Output Voltage Tracking Control for Single-Phase UPS Inverters with Its SPWM Implementation

2020 ◽  
pp. 1-1
Author(s):  
Yunjian Peng ◽  
Weijie Sun ◽  
Feiqi Deng
Keyword(s):  
Tracking Control ◽  
Internal Model ◽  
Output Voltage ◽  
Single Phase ◽  
Internal Model Principle

scholarly journals Design and Experimental Investigation of Rotational Angle-Based Tracking Control

2016 ◽  
Vol 138 (7) ◽  
Author(s):  
Meng Yang ◽  
Xingyong Song ◽  
Zongxuan Sun
Keyword(s):  
Tracking Control ◽  
Internal Model ◽  
Angular Displacement ◽  
Tracking Error ◽  
Sampling Interval ◽  
Linear Matrix ◽  
Computationally Efficient ◽  
Rotational Angle ◽  
Internal Model Principle ◽  
Actuation System

This paper investigates tracking control in the rotational angle domain based on the time-varying internal model principle. The objective is to enable precise, reliable, and computationally efficient output tracking of signals that are dependent on angular displacement. To achieve desired performance, existing approaches based on internal model principle require a large number of samples per revolution, which significantly increases the controller order and also poses challenges for the transient performance. To address those issues, a varying sampling interval approach is proposed, where the angular sampling locations are not fixed but optimized based on tracking errors between sampling points so that desired performance can be achieved without increasing the number of samples. Meanwhile, to improve the convergence rate of the tracking error, additional linear matrix inequalities (LMI) constraints are added to the existing stabilizer synthesis. Through experimental study on a camless engine valve actuation system, the effectiveness of the proposed approaches is demonstrated. It is shown that, compared with the fixed interval sampling, the varying sampling approach can reduce the tracking error by over 50%.

scholarly journals Internal-Model-Principle-Based Specific Harmonics Repetitive Controller for Grid-Connected PWM Inverters

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Wenzhou Lu ◽  
Jinfei Shen ◽  
Yunhu Yang
Keyword(s):  
Internal Model ◽  
Single Phase ◽  
Periodic Signal ◽  
Reference Tracking ◽  
Internal Model Principle ◽  
Control Gain ◽  
Three Phase ◽  
Loop Feedback ◽  
Closed Loop Feedback ◽  
Harmonic Components

This paper analyzes the general properties of IMP-based controller and presents an internal-model-principle-based (IMP-based) specific harmonics repetitive control (SHRC) scheme. The proposed SHRC is effective for specificnk±morder harmonics, withn>m≥0andk=0,1,2,…. Using the properties of exponential function, SHRC can also be rewritten into the format of multiple resonant controllers in parallel, where the control gain of SHRC isn/2multiple of that of conventional RC (CRC). Therefore, including SHRC in a stable closed-loop feedback control system, asymptotic disturbance eliminating, or reference tracking for any periodic signal only including these specific harmonic components atn/2times faster error convergence rate compared with CRC can be achieved. Application examples of SHRC controlled three-phase/single-phase grid-connected PWM inverters demonstrate the effectiveness and advantages of the proposed SHRC scheme.

scholarly journals A pedagogical path from the internal model principle to Youla-Kučera parametrization

2020 ◽  
Vol 53 (2) ◽  
pp. 17374-17379
Author(s):  
Erik Hedberg ◽  
Johan Löfberg ◽  
Anders Helmersson
Keyword(s):  
Internal Model ◽  
Internal Model Principle

INTERNAL MODEL PRINCIPLE FOR TIME-DELAY SYSTEMS OF RETARDED TYPE

2007 ◽  
Vol 40 (20) ◽  
pp. 685-690
Author(s):  
M. Di Loreto ◽  
J.J. Loiseau ◽  
J.-F. Lafay
Keyword(s):  
Time Delay ◽  
Internal Model ◽  
Delay Systems ◽  
Time Delay Systems ◽  
Internal Model Principle
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