Search results for: P. Sannuti

Items from 1 to 20 out of 34 results

chapter

Stabilization of sandwich non-linear systems with low-and-high gain feedback design

A A Stoorvogel, Xu Wang, A Saberi, P Sannuti

Proceedings of the 2010 American Contrl Conference > 4217 - 4222

2010 American Control Conference (ACC 2010)

In this paper, we consider the problems of semi-global and global internal stabilization of a class of sandwich systems consisting of two linear systems with a saturation element in between. We develop here low-and-high gain and scheduled low-and-high gain state feedback design methodologies to solve the posed stabilization problems.

article

Stabilization of a Class of Sandwich Systems Via State Feedback

Xu Wang, A A Stoorvogel, A Saberi, H F Grip, more

IEEE Transactions on Automatic Control > 2010 > 55 > 9 > 2156 - 2160

We consider the problem of state-feedback stabilization for a class of sandwich systems, consisting of two linear systems connected in cascade via a saturation. In particular, we present design methodologies for constructing semiglobally and globally stabilizing controllers for such systems when the input is itself subject to saturation. The design is carried out under a set of assumptions that are...

chapter

Analysis, design, and performance limitations of H~~ optimal filtering in the presence of an additional input with known frequency

A. Saberi, A.A. Stoorvogel, P. Sannuti

2006 American Control Conference > 2233 - 2238

2006 American Control Conference

A generalized gamma-level H_infin sub-optimal input decoupling (SOID) filtering problem is formulated. It is a generalization of gamma-level H_infin SOID filtering problem when, besides an input without known statistical properties but with a finite RMS norm, an additional input is present. The additional input is a linear combination of sinusoidal signals each of which has an unknown amplitude and...

article

Channel electron mobility in 4H–SiC lateral junction field effect transistors

P. Sannuti, X. Li, F. Yan, K. Sheng, more

Solid State Electronics > 2005 > 49 > 12 > 1900-1904

Interface defects have limited 4H–SiC MOS-based FET channel mobility to less than 40–50cm ² /Vs after more than 10years of improvement. Junction-based FET, on the other hand, presents an excellent opportunity. This paper will report the realization of a record high channel mobility of 398cm ² /Vs for 4H–SiC lateral junction FET. The fabrication and characterization as well as computer...

chapter

Decentralized control with input saturation

A. Saberi, A.A. Stoorvogel, P. Sannuti

Proceedings of the 2004 American Control Conference > 3 > 2575 - 2579 vol.3

Proceedings of the 2004 American Control Conference

In decentralized control it is known that the system can be stabilized only if the so-called fixed modes are all stable. If we have input constraints then (semi-) global stability requires all poles to be in the closed left half plane. This paper establishes that these two requirements are necessary and sufficient for stabilizability of a decentralized system with input saturation.

chapter

Connections between H/sub 2/ optimal filters and unknown input observers performance limitations of H/sub 2/ optimal filtering

A. Saberi, A.A. Stoorvogel, P. Sannuti

Proceedings of the 2004 American Control Conference > 4 > 3460 - 3465 vol.4

Proceedings of the 2004 American Control Conference

This paper establishes a connection between the unknown input observer problem (also known as the exact input-decoupling filtering problem) and the Kalman filtering problem. Such a connection leads to a better understanding of filtering. As a consequence of this, tools for the analysis as well as synthesis of filters can be developed. Moreover, such tools can be utilized to establish performance limitations...

chapter

Analysis, design, and performance limitations of H/sub 2/ optimal filtering in the presence of an additional input with known frequency

A. Saberi, A.A. Stoorvogel, P. Sannuti

Proceedings of the 2004 American Control Conference > 4 > 3454 - 3459 vol.4

Proceedings of the 2004 American Control Conference

The standard H/sub 2/ optimal filtering problem considers the estimation of a certain output based on the measured output when the input is a zero mean white noise stochastic process of known intensity. In this paper, the inputs are considered to be of two types. The first type of input, as in standard H/sub 2/ optimal filtering, is a zero mean wide sense stationary white noise, while the second type...

article

Direct Method of Constructing H ₂-Suboptimal Controllers: Continuous-Time Systems

Z. Lin, A. Saberi, P. Sannuti, Y. A. Shamash

Journal of Optimization Theory and Applications > 1998 > 99 > 3 > 585-616

An H ₂-suboptimal control problem is defined and analyzed. Then, an algorithm called H ₂-suboptimal state feedback gain sequence algorithm (Algorithm A1) is developed. Rather than utilizing a perturbation method, which is numerically stiff and computationally prohibitive, Algorithm A1 utilizes a direct eigenvalue assignment method to come up with a sequence of H ₂-suboptimal state feedback gains....

article

Direct Method of Constructing H ₂-Suboptimal Controllers: Discrete-Time Systems

Z. Lin, A. Saberi, P. Sannuti, Y. A. Shamash

Journal of Optimization Theory and Applications > 1998 > 99 > 3 > 617-653

For discrete-time systems, an H ₂-suboptimal control problem is defined and analyzed. Then, an algorithm called H ₂-suboptimal state feedback gain sequence (Algorithm A1) is developed. Rather than utilizing a perturbation method, which is numerically stiff and computationally prohibitive, Algorithm A1 utilizes a direct eigenvalue assignment method to come up with a sequence of H ₂-suboptimal state...

chapter

New Structural Invariants of Linear Multivariable Systems

A. Saberi, H.K. Ozcetin, P. Sannuti

1991 American Control Conference > 1199 - 1203

1991 American Control Conference

Several sets (e.g., lists of integers, polynomials, etc) which remain invariant under a group of transformations including static output feedback control of a linear dynamic system are indentified. A nested feedback loop decomposition of any given system is given which not only identifies the new invariants but also given an algorithmic procedure of computing them. As is known, structural invariants...

article

New structural invariants of linear multivariable systems

A. Saberi, H. K. Ozcetin, P. Sannuti

American Control Conference > 1991 > 28 > 1199 - 1203

American Control Conference

Several sets (e.g., lists of integers, polynomials, etc) Which remain invariant under a group of transformations including static output feedback control of a linear dynamic system are identified. A nested feedback loop decomposition of any given system is given which not only identifies the new invariants but also gives an algorithmic procedure of computing them. As is known, structural invariants...

article

A new stable compensator design for exact and approximate loop transfer recovery

B. M. Chen, A. Saberi, P. Sannuti

American Control Conference > 1990 > 27 > 812 - 817

American Control Conference

In this paper, a new compensator structure for loop transfer recovery (LTR) is proposed. The proposed compensator is (a) open-loop stable, (b) guarantees closed-loop stability and above all (c) requires much smaller values of gain than the conventional observer based controller for the same degree of loop-transfer recovery. The fact that the new compensator requires much smaller values of gain than...

article

A New Stable Compensator Design for Exact and Approximate Loop Transfer Recovery

B. M. Chen, A. Saberi, P. Sannuti

01990 American Control Conference > 1990 > 812 - 817

1990 American Control Conference

article

Global stabilization with almost disturbance decoupling of a class of nonlinear uncertain systems using output feedback

A. Saberi, P. Sannuti

American Control Conference > 1989 > 26 > 729 - 730

American Control Conference

In this paper we study global stabilization of a class of nonlinear uncertain systems while decoupling the output from external disturbances to any specified degree of accuracy. The nominal systems are assumed to be smooth, have a certain strong relative degree and are of minimum phase. Model uncertainties are dealt with either by restricting them to be structured or/and by treating a family of plants...

article

Global Stabilization with Almost Disturbance Decoupling of a Class of Nonlinear Uncertain Systems using Output Feedback

A. Saberi, P. Sannuti

01989 American Control Conference > 1989 > 729 - 730

1989 American Control Conference

article

Observer-Based Control of Uncertain Systems with Nonlinear Uncertainties

A. Saberi, P. Sannuti

01989 American Control Conference > 1989 > 177 - 182

1989 American Control Conference

Global asymptotic stabilization of nominally linear uncertain systems is considered where uncertain elements in the plant are modelled as cone bounded nonlinearities. At first, a linear time-invariant state feedback law ensuring global aymptotic closed-loop stability is obtained. The algorithm which calculates such a feedback law is simple and straightforward. It does not involve repeated solutions...

article

Observer-based control of uncertain systems with nonlinear uncertainties

A. Saberi, P. Sannuti

American Control Conference > 1989 > 26 > 177 - 182

American Control Conference

Global asymptotic stabilization of nominally linear uncertain systems is considered where uncertain elements in the plant are modelled as cone bounded nonlinearities. At first, a linear time-invariant state feedback law ensuring global asymptotic closed-loop stability is obtained. The algorithm which calculates such a feedback law is simple and straightforward. It does not involve repeated solutions...

article

Observer design for loop transfer recovery and for uncertain dynamical systems

A. Saberi, P. Sannuti

American Control Conference > 1988 > 25 > 803 - 808

American Control Conference

A general theory of observer design to achieve LTR is given. The method developed decomposes a given multivariable system into several single input single output subsystems each of which can be designed separately. The design method is in the frame work of 'asymptotic pole placement', or more completely, it is in the frame work of time-scale structure and eigenvalue assignment. Thus it does not suffer...

article

Observer Design for Loop Transfer Recovery and for Uncertain Dynamical Systems

A. Saberi, P. Sannuti

01988 American Control Conference > 1988 > 803 - 808

1988 American Control Conference

A general theory of observer design to achieve LTR is given. The method developed decomposes a given multivariable system into several single input single output subsystems each of which can be designed separately. The design method is in the frame work of `asymptotic pole placement', or more completely, it is in the frame work of time-scale structure and eigenvalue assignment. Thus it does not suffer...

article

High-gain observer design for loop transfer recovery

A. Saberi, P. Sannuti

00026th IEEE Conference on Decision and Control > 1987 > 26 > 953 - 955

26th IEEE Conference on Decision and Control

A systematic procedure of designing a high-gain observer which achieves asymptotic loop transfer recovery is given. The method allows assignment of different time-scales to an observer while permitting a chosen eigenstructure in each time-scale.

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INFONA - science communication portal

Search results for: P. Sannuti

Stabilization of sandwich non-linear systems with low-and-high gain feedback design

Stabilization of a Class of Sandwich Systems Via State Feedback

Analysis, design, and performance limitations of H~~ optimal filtering in the presence of an additional input with known frequency

Channel electron mobility in 4H–SiC lateral junction field effect transistors

Decentralized control with input saturation

Connections between H/sub 2/ optimal filters and unknown input observers performance limitations of H/sub 2/ optimal filtering

Analysis, design, and performance limitations of H/sub 2/ optimal filtering in the presence of an additional input with known frequency

Direct Method of Constructing H ₂-Suboptimal Controllers: Continuous-Time Systems

Direct Method of Constructing H ₂-Suboptimal Controllers: Discrete-Time Systems

New Structural Invariants of Linear Multivariable Systems

New structural invariants of linear multivariable systems

A new stable compensator design for exact and approximate loop transfer recovery

A New Stable Compensator Design for Exact and Approximate Loop Transfer Recovery

Global stabilization with almost disturbance decoupling of a class of nonlinear uncertain systems using output feedback

Global Stabilization with Almost Disturbance Decoupling of a Class of Nonlinear Uncertain Systems using Output Feedback

Observer-Based Control of Uncertain Systems with Nonlinear Uncertainties

Observer-based control of uncertain systems with nonlinear uncertainties

Observer design for loop transfer recovery and for uncertain dynamical systems

Observer Design for Loop Transfer Recovery and for Uncertain Dynamical Systems

High-gain observer design for loop transfer recovery

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