Multi-centralized control system design based on equivalent transfer functions using gain and phase-margin specifications for unstable TITO process

This paper describes the design of centralized controller for two variable processes. The two variable process structures are somehow different from the single variable processes. This difference is occurred because of interrelations between the variables present in the process. Hence, when a controller is planned for such systems, the relations amid the variables must be taken into consideration. This process is done in decentralized control system design. But decentralized control system works well when the interrelations between the variables are simple. If the interaction is strong, then the centralized control system is preferred since it uses a controller for each pair of input and output variables. The controller used in main diagonal works for improving the servo performance and off diagonal controller reduces the interrelation effect. So the performance is improved by minimizing the interrelation effects. The design process is easy to understand by field engineers working in industries. The simulation results are included in this paper to specify the efficacy of the proposed scheme.

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Robust Control System Design for Multivariable Plants With Lightly Damped Modes

Volume 4: ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications and the 19th Reliability, Stress Analysis, and Failure Prevention Conference ◽

10.1115/detc2007-35508 ◽

2007 ◽

Cited By ~ 4

Author(s):

D. Nelson-Gruel ◽

P. Lanusse ◽

A. Oustaloup ◽

V. Pommier

Keyword(s):

Control System ◽

System Design ◽

Transfer Matrix ◽

Transfer Functions ◽

Controller Design ◽

Open Loop ◽

Bench Mark ◽

Control System Design ◽

Stabilizing Controller ◽

Robust Control System

A robust controller design is proposed for the active suspension system bench-mark problem. The CRONE control system design used is extended to unstable multivariable plants with lightly damped modes and RHP zeros. Decoupling and stabilizing controller K, is achieved for the open-loop transfer matrix. Fractional order transfer functions are used to define all the components of the diagonal open-loop transfer matrix, β. In defining the fractional open-loop transfer function β0i some elements of the plants, G0 and its inverse must be considered to achieve the stable controller. Optimisation provides the best fractional open-loop βopt. Finally, frequency domain system identification is used to find controller K=G0−1 βopt.

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Hardware in the Loop of Two Rotors Platform

Jurnal Teknologi ◽

10.11113/jt.v71.3711 ◽

2014 ◽

Vol 71 (2) ◽

Author(s):

Nur Amalina Musa ◽

Shuhaimi Mansor ◽

Airi Ali

Keyword(s):

Control System ◽

System Design ◽

Transfer Functions ◽

Low Cost ◽

Measurement Unit ◽

Control System Design ◽

Bank Angle ◽

Hardware Interface ◽

Unstable Platform ◽

System Inertia

This study is aimed to control unstable platform by introducing control system design through low-cost test rig for two rotor system with a feedback control. The rig is used to control the bank angle by adjusting the thrust from each rotor and useful as a teaching aid in control system design. In this paper, the transfer functions of the dynamic system for the two rotor platform was derived and introduce into the controller system. Inertia Measurement Unit (IMU) was installed to provide feedback to the control system. MATLAB Simulink is used to simulate the response of the system before going to the real application while LabVIEW is used to interface the hardware interface and programmed the control system.

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