Journal ArticleDOI
Non-linear design for cost of feedback reduction in systems with large parameter uncertainty †
Isaac Horowitz,Patrick Rosenbaum +1 more
TLDR
In this paper, a non-linear first-order reset element (FORE) is used to reduce the feedback loop transmission bandwidth of linear, minimum-phase plants with large parameter uncertainty.Abstract:
Feedback systems containing linear, minimum-phase plants with large parameter uncertainty may be designed to achieve specified performance tolerances over the entire range of parameter uncertainty. The principal ‘cost of feedback’ is in the feedback loop bandwidth, which is generally much larger than that of the system as a whole. This makes the system very sensitive to sensor noise and high-frequency parasitics. It is shown how a non-linear ‘first-order reset element’ (FORE) may be used to drastically decrease the feedback loop transmission bandwidth. One is logically led to FORE by simple, linear feedback frequency response concepts. The paper assumes that the primary design problem is to satisfy quantitative response tolerances to command inputs. However, disturbances at the plant are not neglected, but the specification on such disturbances is in the damping of the step response. An important feature of the non-linear design is that the system response to command inputs is almost exactly that of a lin...read more
Citations
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Journal ArticleDOI
Stabilization of magnetic suspension system by a reset element (Adjustment of vibration attenuation characteristic)
TL;DR: In this article, a first-order reset element (FORE) controller is modified to adjust the vibration attenuation characteristic of a magnetic suspension system, which is the simplest control method of stabilizing magnetic suspension systems.
Posted Content
Adaptive Feedforward Control For Reset Feedback Control Systems - Application in Precision Motion Control.
TL;DR: A novel adaptive feedforward controller design for reset control systems based on converging and diverging regions of adaptation to achieve good tracking is presented.
Posted Content
Frequency-Domain Modelling of Reset Control Systems using an Impulsive Description
TL;DR: A novel approach for modelling RC is considered, which uses state-dependent impulse inputs and is shown to permit an accurate computation of closed-loop RC behaviour starting from an open-loop model, thus linking both aspects, enhancing system understanding.
Proceedings Article
Stabilization of Magnetic Suspension System by using First-Order-Reset Element without Derivative Feedback
TL;DR: A magnetic suspension system is stabilized by the modified FORE, which is a first-order low-pass filter with reset functions modified as to the reset conditions.
Book ChapterDOI
Comparative Analysis of Gain-Scheduled Wheel Slip Reset Controllers with Different Reset Strategies in Automotive Brake Systems
TL;DR: The robustness of the system to changes in the friction conditions is also improved by reset control and reset bands, which helps to enhance the overall effectiveness of the braking maneuver.
References
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Book
Multiple-Input Describing Functions and Nonlinear System Design
TL;DR: The theory of automatic control has been advanced in important ways during recent years, particularly with respect to stability and optimal control, but these theories do not, however, lay to rest all questions of importance to the control engineer.
Book
Synthesis of feedback systems
TL;DR: Synthesis of feedback systems, Synthesis of Feedback Systems, this article, synthesis of feedback system, feedback system synthesis, feedback synthesis, synthesizing feedback systems, مرکز فناوری اطلاعات و اسلاز رسانی
Journal ArticleDOI
Synthesis of feedback systems with large plant ignorance for prescribed time-domain tolerances†
Isaac Horowitz,Marcel Sidi +1 more
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.
Journal ArticleDOI
Synthesis of a non-linear feedback system with significant plant-ignorance for prescribed system tolerances†
K. R. Krishnan,Isaac Horowitz +1 more
TL;DR: In this article, the authors investigated the use of the nonlinear device known as the Clegg integrator in the design of a nonlinear feedback system, which minimizes the effect of white sensor noise on the input to the plant.
Related Papers (5)
Fundamental properties of reset control systems
Synthesis of a non-linear feedback system with significant plant-ignorance for prescribed system tolerances†
K. R. Krishnan,Isaac Horowitz +1 more