Stability Analysis On the Nichols Chart and Its Application in QFT
نویسندگان
چکیده
A new stability criterion on Nichols chart is presented. It provides an alternative graphical method for stability analysis on Nichols chart. Furthermore this result can be used to test the stability of the new nominal closed-loop system arising in QFT controller design method for non-minimum phase and unstable plants, which is diicult to test with the existing stability criterion.
منابع مشابه
IEEE Control Systems Magazine
IEEE Control Systems Magazine 119 Quantitative Feedback Design of Linear and Nonlinear Control Systems, by Oded Yaniv, Kluwer Academic, 1999, 369 pp., $140.00, ISBN 0-7923-8529-2; Quantitative Feedback Theory: Fundamentals and Applications, by Constantine H. Houpis and Steven J. Rasmussen, 1999, Marcel Dekker, 408 pp., $150.00, ISBN 0-8247-7872-3. Reviewed by Gerald Hearns. After years without ...
متن کاملQuantitative Feedback Theory and Its Application in UAV’s Flight Control
Quantitative feedback theory (hereafter referred as QFT), developed by Isaac Horowitz (Horowitz, 1963; Horowitz and Sidi, 1972), is a frequency domain technique utilizing the Nichols chart in order to achieve a desired robust design over a specified region of plant uncertainty. Desired time-domain responses are transformed into frequency domain tolerances, which lead to bounds (or constraints) ...
متن کاملRobust controller and pre-filter design using QFT and interval constraint techniques
Robust control system design for uncertain systems (aka “plants”) is of great practical interest, and their automation is a key concern in the control community [1]. In the last few decades, several robust control methodologies in time as well as frequency domains have been proposed (cf. [1]). Quantitative Feedback Theory (QFT) [2] is a one such frequency-domain controller design technique base...
متن کاملA New Approach for QFT-type Robust Controller Design in Uncertain Multivariable Systems
This paper presents a robust controller design methodology for a class of linear uncertain multivariable systems with hard time-domain constraints on their outputs and control signals in response to step disturbance inputs. In this approach, the m×m MIMO system is replaced by m2 SISO systems and then, using the QFT technique, desirable controllers are synthesized. The final controller will be d...
متن کاملStability and Robust Performance Analysis of Fractional Order Controller over Conventional Controller Design
In this paper, a new comparative approach has been proposed for reliable controller design. Scientists and engineers are often confronted with the analysis, design, and synthesis of real-life problems. The first step in such studies is the development of a 'mathematical model' which can be considered as a substitute for the real problem. The mathematical model is used here as a plant. Fractiona...
متن کامل