Topic
Nichols plot
About: Nichols plot is a research topic. Over the lifetime, 114 publications have been published within this topic receiving 2049 citations.
Papers published on a yearly basis
Papers
TL;DR: The design procedure is quite transparent, providing the designer with the insight to make necessary tradeoffs, at every step in the design process, based on frequency response concepts.
Abstract: There is given a minimum-phase plant transfer function, with prescribed bounds on its parameter values The plant is imbedded in a two-degree-of freedom feedback system, which is to be designed such that the system time response to a deterministic input lies within specified boundaries Subject to the above, the design should be such as to minimize the effect of sensor noise at the input to the plant This report presents a design procedure for this purpose, based on frequency response concepts The time-domain tolerances are translated into equivalent frequency response tolerances The latter lead to bounds on the loop transmission function in the form of continuous curves on the Nichols chart The properties of the loop transmission function which satisfy these bounds with minimum effect of sensor noise, are derived
462 citations
TL;DR: In this article, a robust PID controller for automatic generation control (AGC) of hydro turbine power systems is presented. The method is mainly based on a maximum peak resonance specification that is graphically supported by the Nichols chart, and the open-loop frequency response curve is tangent to a specified ellipse.
198 citations
Book•
1 Jun 1967
TL;DR: In this paper, the authors present an analysis and design of feedback control systems: Objectives and Methods 12. Nyquist Analysis 13 Nyquist Design 14 Root-Locus Design 15. Bode Analysis 16 Bode Design 17 Nichols Chart Analysis 18 Nichols Chart Design 19.
Abstract: 1. Introduction 2. Control Systems Terminology 3. Differential Equations, Difference Equations, and Linear Systems 4. The LaPlace Transform 5. The Z-Transform 6. Stability 7. Transfer Functions 8. Block Diagram Algebra and Transfer Functions of Systems 9. Signal Flow Graphs 10. System Sensitivity Measures and Classification of Feedback Systems 11. Analysis and Design of Feedback Control Systems: Objectives and Methods 12. Nyquist Analysis 13. Nyquist Design 14. Root-Locus Design 15. Bode Analysis 16. Bode Design 17. Nichols Chart Analysis 18. Nichols Chart Design 19. Introduction to Nonlinear Control Systems 20. Introduction to Advanced Systems 21. Topics in Control Systems 22. Analysis and Design
193 citations
TL;DR: In this article, a new systematic tuning method with a new structure to design a robust PID load frequency controller for multimachine power systems is presented, which is mainly based on a maximum peak resonance specification that is graphically supported by the Nichols chart.
157 citations
TL;DR: In this paper, the Sumudu transform has been used to construct new transfer functions that will lead to new Bode, Nichols and Nyquist plots, and the question that arises in the work, is the following: Can we apply the SUMUDU transform to construct a new transfer function that can be used in signal analysis, including the Bode diagram, Nyquist plot and Nichols plot?
Abstract: In the last past year researchers have relied on the ability of Laplace transform to solve partial, ordinary linear equations with great success. Important analysis in signal analysis including the transfer function, Bode diagram, Nyquist plot and Nichols plot are obtained based on the Laplace transform. The output of the analysis depends only on the results obtained from Laplace transform. However, one weakness of Laplace transform is that the Laplace transform of even function is odd while the Laplace transform of an old function is even which is lack of conservation of properties. On the other hand there exist a similar integral transform known as Sumudu transform has the ability to conserve the properties of the function from real space to complex space. The question that arises in the work, is the following: Can we apply the Sumudu transform to construct new transfer functions that will lead to new Bode, Nichols and Nyquist plots? this question is answered in this work.
116 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 5 |
| 2020 | 4 |
| 2019 | 1 |
| 2018 | 3 |
| 2017 | 3 |
| 2016 | 3 |