Controller design by using non-linear control methods for satellite chaotic system

This paper addresses the theoretical aspects of non-linear adaptive control of robots when motor dynamics is included. It is shown that the resulting third-order dynamic models can be transformed into an attractive form, under moderate assumptions, to which the most recent controller design methods are applicable. The third-order model retains important properties (properties 1, 2 and 3 in the paper) which are present in the second-order rigid-body models of robots. Control methods are proposed to tackle two main issues: parameter adaptation for unknown dynamic parameters and robustness in the sense of modelling errors. It is shown that the control methods for rigid-body robots can easily be extended for higher order systems that possess properties 1, 2 and 3.

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Development of Non Contact Torque Sensor Applied to Wind Generator

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.651.976 ◽

2013 ◽

Vol 651 ◽

pp. 976-980

Author(s):

Dong Ying Ju ◽

Kazuaki Tabata

Keyword(s):

Wind Energy ◽

Linear Control ◽

Wind Generation ◽

Control Methods ◽

Torque Sensor ◽

Variable Speed ◽

Torque Measurement ◽

Wind Generator ◽

Non Linear ◽

Energy Application

In order to solve the variable speed control as non-linear in wind energy application, it is important to obtain wind energy efficiently. And it is also effective in suppressing output fluctuation. Therefore, it will become a main torque system in the wind generation. The main object of this paper is to present a developed non-contact torque sensor for applying of non-linear control in the wind generator. In this paper, it examines whether efficient torque measurement of output shaft in the wind generation would be maintainable by non-linear control methods.

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Performance Analysis of Controller Design for DC-DC Buck Converter Using Linear and Non Linear Technique

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.719-720.417 ◽

2015 ◽

Vol 719-720 ◽

pp. 417-425 ◽

Cited By ~ 1

Author(s):

Husan Ali ◽

Xian Cheng Zheng ◽

Shahbaz Khan ◽

Waseem Abbas ◽

Dawar Awan

Keyword(s):

Output Voltage ◽

Control Method ◽

Controller Design ◽

Sliding Mode ◽

Input Voltage ◽

Buck Converter ◽

Linear Control ◽

Control Technique ◽

Control Techniques ◽

Non Linear

The switched mode dc-dc converters are some of the most widely used power electronics circuits because of high conversion efficiency and flexible output voltage. Many methods have been developed for the control of dc-dc converters. This paper deals with design of controller for dc-dc buck converter using various control techniques. The first two control techniques are based on classical or linear control methods i.e. PI and PID control, while the other two control technique are based on non linear control method i.e. Sliding Mode Control (SMC) and Sliding Mode Proportional Integral Derivative Control (SMC-PID). The output voltage and the inductor current of the applied control techniques are analyzed and compared in transient and steady state region. Also the robustness of the buck converter system is tested for load changes and input voltage variations. Matlab/Simulink is used for the simulations. The detailed simulation results are presented, which compare the performance of the designed controllers for various cases. The results show that the non linear control for DC/DC Buck converter proves to be more robust than linear control especially when dynamic tests are applied.

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Innovative Development of Non-Contact Torque Sensor Applied to Wind Generator

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.541-542.1032 ◽

2014 ◽

Vol 541-542 ◽

pp. 1032-1035

Author(s):

Dong Ying Ju ◽

Kazuaki Tabata

Keyword(s):

Wind Energy ◽

Linear Control ◽

Wind Generation ◽

Control Methods ◽

Torque Sensor ◽

Variable Speed ◽

Torque Measurement ◽

Wind Generator ◽

Non Linear ◽

Energy Application

In order to solve the variable speed control as non-linear in wind energy application, it is important to obtain wind energy efficiently. And it is also effective in suppressing output fluctuation. Therefore, it will become a main torque system in the wind generation. The main object of this paper is to present a developed non-contact torque sensor for applying of non-linear control in the wind generator. In this paper, it examines whether efficient torque measurement of output shaft in the wind generation would be maintainable by non-linear control methods.

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Non-linear control of a series direct current motor via flatness and decomposition in the bond graph domain

Proceedings of the Institution of Mechanical Engineers Part I Journal of Systems and Control Engineering ◽

10.1243/095965105x9542 ◽

2005 ◽

Vol 219 (3) ◽

pp. 215-229 ◽

Cited By ~ 4

Author(s):

S Junco ◽

A Donaire ◽

A Achir ◽

C Sueur ◽

G Dauphin-Tanguy

Keyword(s):

Control System ◽

Direct Current ◽

Controller Design ◽

Bond Graph ◽

Linear Control ◽

System Decomposition ◽

Direct Current Motor ◽

Non Linear ◽

Control System Synthesis ◽

Main Components

A bond graph (BG) based methodology for non-linear control system synthesis is presented through its application to a speed-tracking problem stated on a series direct current motor. After a global flatness analysis of the motor BG model, a two-loop cascade control structure is decided and developed on the basis of a physical system decomposition in electrical, mechanical, and coupling submodels. Each loop of the cascade tracks a reference for a flat output that is local to a subsystem of the decomposition. Bond graph techniques are given for the three main components of the design methodology: system decomposition, flatness analysis, and tracking controller design. Theoretical and practical properties of the resulting control system are discussed, and its performance is demonstrated through simulation experiments. The methodology is applicable to the broader class of non-linear BG models where input-output system inversion is well defined.

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