Michael McCourt

Michael McCourt
University of Washington Tacoma | UW Tacoma · School of Engineering and Technology

About

38
Publications
2,711
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506
Citations
Introduction

Publications

Publications (38)
Conference Paper
Full-text available
Recent advances in technology have increased the capability of mobile platforms while decreasing the cost. It has become more feasible to deploy a team of agents to cooperatively accomplish an objective. While multi-agent systems provide advantages, including lower cost and robustness to failure, there is a need for additional study of principles f...
Conference Paper
The capabilities of autonomy have grown to encompass new application spaces that until recently were considered exclusive to humans. In the past, automation has focused on applications where it was preferable to completely replace the human. Today, though, we have the opportunity to leverage the complementary strengths of both human and autonomy te...
Conference Paper
This paper focuses on the notions of QSR dissipativity and passivity in hybrid systems. The work presented in this paper can mainly be divided into two parts- (i) feedback and parallel interconnections and, (ii) networks. First, it is shown that the negative feedback interconnection of two QSR dissipative hybrid systems is QSR dissipative. Also, pa...
Conference Paper
While traditional sensors provide accurate measurements of quantifiable information, humans provide better qualitative information and holistic assessments. Sensor fusion approaches that team humans and machines can take advantage of the benefits provided by each while mitigating the shortcomings. These two sensor sources can be fused together usin...
Article
A novel approach for human-generated "soft information" modeling and Bayesian fusion using touch interface devices is presented. The human-generated soft information can be encoded using a combination of single, multiple, and overlapping strokes that represent arbitrary measurement likelihood functions which can be approximated using non-parametric...
Conference Paper
Dissipativity is a valuable tool for analysis and synthesis of dynamical systems, however, the search for an appropriate storage function to show the property is often not straightforward. This paper uses sum of squares (SOS) optimization methods to determine whether a nonlinear or switched system is dissipative. This is especially useful for switc...
Conference Paper
The Model-Based Networked Control System (MB-NCS) framework can be used to improve performance in applications where communication rates are limited. This framework has been studied for linear systems with state feedback, but little has been done for the nonlinear case or for the output feedback case. This paper approaches the problem of networking...
Article
Full-text available
The notions of passivity and positive realness are fundamental concepts in classical control theory, but the use of the terms has varied. For LTI systems, these two concepts capture the same essential property of dynamical systems, that is, a system with this property does not generate its own energy but only stores and dissipates energy supplied b...
Article
Full-text available
In this paper, we consider the following problem: what passivity properties for a nonlinear system can be inferred when its linearization around an equilibrium point is known to be passive. We consider both continuous-time and discrete-time systems with feedthrough terms. Our main results show that when the linearized model is simultaneously strict...
Article
Passivity and dissipativity are important in the study of Cyber Physical Systems (CPS) where systems with time and event-driven dynamics are connected. This paper provides conditions which guarantee stability of interconnected switched systems which may be used to model CPS. Results are presented for maintaining stability when switched systems are...
Article
In cyberphysical systems, where compositionality of design is an important requirement, passivity and dissipativity based design methods have shown a lot of promise. Although these concepts are classical, their application to cyberphysical systems poses new and interesting challenges. The aim of this paper is to summarize some of the on-going work...
Conference Paper
Full-text available
This paper considers a notion of QSR dissipativity for discrete-time switched systems that uses multiple supply rates. The focus on switched systems is motivated by cyber physical systems (CPS) where physical dynamics interact with discrete-event or logical dynamics. The notion of QSR dissipa-tivity used in this paper is based on previous work on Q...
Article
Passivity theory is a well-established tool for analysis and synthesis of dynamical systems. Recently, this work has been extended to switched and hybrid systems where passivity and stability results of single systems as well as interconnected systems are derived. However, the results may no longer hold when quantization is present as is the case w...
Conference Paper
In Cyber-Physical Systems large numbers of heterogeneous cyber and physical subsystems are networked, are interacting tightly, may change dynamically and may expand or contract. Designing and preserving properties of a CPS over its lifespan is very challenging. Passivity and dissipativity are energy like concepts that offer great promise in guarant...
Conference Paper
In this paper the problem of controlling nonlinear switched systems over a network with time-varying delay is addressed. The solution presented is an extension of results from the control of continuously-varying passive systems over a network using the wave variable transformation. Background material is presented on passivity and the wave variable...
Conference Paper
This paper presents a framework for control design of interconnected nonlinear switched systems using passivity and passivity indices. Background material is presented on the concept of passivity indices for continuously-varying systems. The passivity indices are then generalized to apply to switched systems to measure the level of passivity in a s...
Article
Full-text available
This report covers open-loop conditions that guarantee closed-loop stability of a feedback interconnection of two systems. The traditional solutions for this problem are passivity theory and the small gain theorem. These approaches can be shown to be part of a larger design framework. Two such larger frameworks are the conic systems framework and t...

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