Youla parameterized adaptive vibration suppression with adaptive notch filter for unknown multiple narrow band disturbances

2018 ◽  
Vol 25 (3) ◽  
pp. 685-694 ◽  
Author(s):  
Zhizheng Wu ◽  
Maotong Zhang ◽  
Zhenyou Chen ◽  
Pei Wang
Keyword(s):  
Adaptive Control ◽  
Data Storage ◽  
Vibration Suppression ◽  
Control Method ◽  
Narrow Band ◽  
Storage System ◽  
Notch Filter ◽  
Flying Height ◽  
Control Approach ◽  
Adaptive Notch Filter

The vibration caused by the multiple narrow band disturbances exists widely in the mechanical systems. In this paper, a Youla parameterized adaptive control approach is introduced for the rejection of unknown multiple narrow band disturbances. The adaptive notch filter weighted Q (Youla) parameter is adopted to the online internal model principle-based regulator, so that the disturbances can be fully attenuated and the robustness of the closed-loop system is improved. A central controller is first designed to obtain the desired baseline loop shape. Then, the controller is augmented by a notch filter weighted Q parameter to construct a series of stable controllers and the Q parameter in the stable controllers is tuned online to obtain the desired controller. The adaptive control method is applied in a data storage system to attenuate the flying height vibration and the experimental results illustrate the effectiveness of the proposed approach in rejecting unknown multiple narrow band disturbances.

scholarly journals A Novel Adaptive Control Approach Based on Available Headroom of the VSC-HVDC for Enhancement of the AC Voltage Stability

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3222
Author(s):  
Duc Nguyen Huu
Keyword(s):  
Adaptive Control ◽  
Voltage Stability ◽  
Reactive Power ◽  
Control Method ◽  
Offshore Wind ◽  
Voltage Source ◽  
Long Distance ◽  
Control Approach ◽  
Hvdc System ◽  
Voltage Support

Increasing offshore wind farms are rapidly installed and planned. However, this will pose a bottle neck challenge for long-distance transmission as well as inherent variation of their generating power outputs to the existing AC grid. VSC-HVDC links could be an effective and flexible method for this issue. With the growing use of voltage source converter high-voltage direct current (VSC-HVDC) technology, the hybrid VSC-HVDC and AC system will be a next-generation transmission network. This paper analyzes the contribution of the multi VSC-HVDC system on the AC voltage stability of the hybrid system. A key contribution of this research is proposing a novel adaptive control approach of the VSC-HVDC as a so-called dynamic reactive power booster to enhance the voltage stability of the AC system. The core idea is that the novel control system is automatically providing a reactive current based on dynamic frequency of the AC system to maximal AC voltage support. Based on the analysis, an adaptive control method applied to the multi VSC-HVDC system is proposed to realize maximum capacity of VSC for reactive power according to the change of the system frequency during severe faults of the AC grid. A representative hybrid AC-DC network based on Germany is developed. Detailed modeling of the hybrid AC-DC network and its proposed control is derived in PSCAD software. PSCAD simulation results and analysis verify the effective performance of this novel adaptive control of VSC-HVDC for voltage support. Thanks to this control scheme, the hybrid AC-DC network can avoid circumstances that lead to voltage instability.

Adaptive Control of Hybrid Ultracapacitor-Battery Storage System for PV Output Smoothing

2013 ◽  
Author(s):  
Yanzhu Ye ◽  
Ratnesh Sharma ◽  
Di Shi
Keyword(s):  
Adaptive Control ◽  
Energy Storage ◽  
Control Method ◽  
Storage System ◽  
Energy Storage System ◽  
Battery Storage ◽  
System Operation ◽  
Energy Storage Devices ◽  
Real Time System ◽  
Current Limit

The integration of hybrid energy storage system (ESS) with PV has been considered an effective solution for PV power smoothing, e.g. the hybrid Ultracapacitor (UC)-Battery storage system. This paper proposes a fuzzy-logic-based adaptive power management system for smoothing PV power output, which manages the power sharing between the UC and Battery system. In this method, the real-time system dynamics are reflected in the adaptive control parameter settings. At the same time this method effectively considers the characteristics and operational constraints of the energy storage devices, e.g. SOC limit, charge/discharge current limit, etc., in order to sustain the system operation. A hybrid PV/UC/Battery power system is modeled by Matlab/Simulink. The simulation studies are performed to demonstrate the effectiveness and advantages of the proposed control method in PV fluctuation suppression, sustainable system operation, energy storage performance.

An adaptive control approach for semi-active suspension systems under unknown road disturbance input using hardware-in-the-loop simulation

2020 ◽  
pp. 014233121989593 ◽  
Author(s):  
Gokhan Kararsiz ◽  
Mahmut Paksoy ◽  
Muzaffer Metin ◽  
Halil Ibrahim Basturk
Keyword(s):  
Adaptive Control ◽  
Control Method ◽  
Active Suspension ◽  
Magnetorheological Damper ◽  
Hardware In The Loop ◽  
Control Approach ◽  
The Road ◽  
Suspension Systems ◽  
Active Suspension Systems ◽  
Road Disturbance

This article presents an application of the adaptive control method to semi-active suspension systems in the presence of unknown disturbance and parametric uncertainty. Due to the technical difficulties such as time delay and sensor noise, the road disturbance is assumed to be unmeasured. To overcome this problem, an observer is designed to estimate the disturbance. It is considered that the road profile consists of a finite number of the sum of sinusoidal signals with unknown amplitudes, phases and frequencies. After the parametrization of the observer, the adaptive control approach is employed to attenuate the effect of the road-induced vibrations using a magnetorheological damper. It is proved that the closed-loop system is stable, despite the adverse road conditions. Finally, the performance of the controller is illustrated with a hardware-in-the-loop simulation in which the system is subjected to sinusoidal and random profile road excitations. To demonstrate the benefits of the adaptive controller, the results are presented in comparison with a conventional proportional integral derivative (PID) controller.

Tilt detection and servo control method for the holographic data storage system

2009 ◽  
Vol 15 (10-11) ◽  
pp. 1695-1700 ◽  
Author(s):  
Sang-Hoon Kim ◽  
Jang Hyun Kim ◽  
Junho Yang ◽  
Hyunseok Yang ◽  
Joo-Youn Park ◽  
...  
Keyword(s):  
Data Storage ◽  
Control Method ◽  
Storage System ◽  
Servo Control ◽  
Holographic Data Storage ◽  
Data Storage System

GENERALIZED (LAG, ANTICIPATED AND COMPLETE) PROJECTIVE SYNCHRONIZATION IN TWO NONIDENTICAL CHAOTIC SYSTEMS WITH UNKNOWN PARAMETERS

2012 ◽  
Vol 26 (16) ◽  
pp. 1250121
Author(s):  
XINGYUAN WANG ◽  
LULU WANG ◽  
DA LIN
Keyword(s):  
Adaptive Control ◽  
Chaotic Systems ◽  
Lorenz System ◽  
Control Method ◽  
Projective Synchronization ◽  
Unknown Parameters ◽  
Chen System ◽  
Control Approach ◽  
Response System ◽  
Hyperchaotic Lorenz System

In this paper, a generalized (lag, anticipated and complete) projective synchronization for a general class of chaotic systems is defined. A systematic, powerful and concrete scheme is developed to investigate the generalized (lag, anticipated and complete) projective synchronization between the drive system and response system based on the adaptive control method and feedback control approach. The hyperchaotic Chen system and hyperchaotic Lorenz system are chosen to illustrate the proposed scheme. Numerical simulations are provided to show the effectiveness of the proposed schemes. In addition, the scheme can also be extended to research generalized (lag, anticipated and complete) projective synchronization between nonidentical discrete-time chaotic systems.

Assist Control Method Based on Operating Property for Task from Automated Transfer to Manual Positioning of Flexible Parts

2009 ◽  
Vol 3 (6) ◽  
pp. 700-708 ◽  
Author(s):  
Atsushi Ohzawa ◽  
◽  
Yoshifumi Morita ◽  
Yosuke Suzuki ◽  
Susumu Hara ◽  
...  
Keyword(s):  
Vibration Suppression ◽  
Control Method ◽  
Notch Filter ◽  
Frequency Component ◽  
Industrial Robots ◽  
Mode Switching ◽  
Input Shaping ◽  
Control Input ◽  
Flexible Parts ◽  
Force Signal

Industrial production lines combine both autonomous machinery such as industrial robots and operator-machine cooperative power-assist systems. There are a lot of flexible and large parts among assembly parts, because of the weight saving. In efficient switching among machine- and operator-oriented operation, vibration suppression is an important issue. This paper presents operator-based assist control for task from automated transfer to manual positioning of flexible parts. This involves a mode-switching compensator whose control input is continuous and an input-shaping compensator that suppresses flexible-parts vibration. The input-shaping compensator using a notch filter eliminates the vibration frequency component from the operating force signal. Filter gain is adjusted online based on operating properties. The effectiveness of our proposal is verified from (i) maneuverability based on time-response evaluation and task-achievement time, and (ii) operational feel subjectively evaluated based on questionnaires.

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