Journal ArticleDOI
Gain margins and phase margins for control systems with adjustable parameters
K.W.Han,C.-H. Chang +1 more
TLDR
The proposed method is applied to a pitch-rate control system for a re-entry vehicle, and comparisons with the results in current literature are made.Abstract:
This paper presents a method for finding the gain margins and phase margins of control systems with adjustable parameters. The considered systems are first modified by adding an analytical gain-phase margin tester. Then, the characteristic equations are formulated. Finally, the stability equations are used to find the boundaries of constant gain margins and phase margins. The main advantage of the proposed method is to obtain complete information about the effects of adjustable parameters on gain margins and phase margins. As an example, the method is applied to a pitch-rate control system for a re-entry vehicle, and comparisons with the results in current literature are made.read more
Citations
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Journal ArticleDOI
An Algorithm for Stabilization of Fractional-Order Time Delay Systems Using Fractional-Order PID Controllers
TL;DR: An algorithm based on determining a set of global stability regions corresponding to the fractional orders lambda and mu in the range of (0, 2) and choosing the biggest global stability region in this set is presented.
Journal ArticleDOI
Stabilizing and robust fractional order PI controller synthesis for first order plus time delay systems
Ying Luo,YangQuan Chen +1 more
TL;DR: A guideline for choosing two feasible or achievable specifications, and a new FOPI/IOPID controller synthesis are proposed for all the stable FOPTD systems, revealing, for the first time, the potential advantages of one controller over the other in terms of achievable performances.
Journal ArticleDOI
Robust PID tuning strategy for uncertain plants based on the Kharitonov theorem
Ying J. Huang,Yuan-Jay Wang +1 more
TL;DR: The synthesized controller with coefficients selected from the obtained non-conservative Kharitonov region can stabilize the concerned uncertain plants and fulfill system specifications in terms of gain margins and phase margins.
Journal ArticleDOI
Spectrum Analysis of LTI Continuous-Time Systems With Constant Delays: A Literature Overview of Some Recent Results
Libor Pekar,Qingbin Gao +1 more
TL;DR: This review paper aims to provide the reader with a detailed literature survey on the selected recent results on the topic of spectrum analysis of the LTI-TDSs to suggest possible future research directions to be tackled by scientists and engineers in the field.
Journal ArticleDOI
On Low-Velocity Compensation of Brushless DC Servo in the Absence of Friction Model
TL;DR: A novel straightforward reference compensation scheme for the brushless dc servo system independent of the friction model is presented to reject the aftereffect caused by the friction instead of its original mechanics.
References
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Book
Automatic Control Systems
TL;DR: This new edition of Automatic Control Systems features a new, accessible approach for students taking introductory courses on control systems while retaining the depth and rigor of Benjamin Kuos classic, best-selling text.
Book
Nonlinear systems;: The parameter analysis and design
TL;DR: In this article, a book on nonlinear systems analysis and design covering parameter mapping, symmetrical, transient and forced oscillations and stability analysis is presented. But the authors do not cover the analysis of nonlinear system dynamics.
Journal ArticleDOI
Control system analysis and design using a parameter space method
TL;DR: A method of describing a system in parameter space is presented and can be applied to the analysis and design of high-order control systems with multiple variable or adjustable parameters.
Journal ArticleDOI
High order system analysis and design using the root locus method
K.W. Han,G.J. Thaler +1 more
TL;DR: In this paper, the root locus method is used to define a general stability criterion for any order linear systems, based on the distribution of real roots in even and odd parts of characteristic equations, the relative damping character of high order systems can be predicted.