WorldCat Identities

Athans, M.

Overview
Works: 27 works in 30 publications in 1 language and 31 library holdings
Classifications: QA402, 003
Publication Timeline
Key
Publications about  M Athans Publications about M Athans
Publications by  M Athans Publications by M Athans
Most widely held works by M Athans
On the Complexity of Decentralized Decision Making and Detection Problems ( Book )
2 editions published between 1984 and 1985 in English and held by 2 WorldCat member libraries worldwide
The authors study the computational complexity of the discrete versions of some simple but basic decentralized decision problems. These problems are variations of the classical 'team decision problem' and include the problem of decentralized detection, whereby a central processor is to select one of two hypotheses, based on 1-bit messages from two non-communicating sensors. Results point to the inherent difficulty of decentralized decision making and suggest that optimality may be an elusive goal. (Author)
On the complexity of distributed decision problems by John N Tsitsiklis ( Book )
2 editions published between 1983 and 1984 in English and held by 2 WorldCat member libraries worldwide
We study the computational complexity of finite versions of the simplest and fundamental problems of distributed decision making and we show that, apart from a few exceptions, such problems are hard (NP-complete, or worse). Some of the problems studied are the well-known team decision problem, the distributed hypothesis testing problem, as well as the problem of designing a communications protocol that guarantees the attainment of a prespecified goal with as little communications as possible. These results indicate the inherent difficulty of distributed decision making, even for very simple problems, with trivial centralized counterparts and suggest that optimally may be an elusive goal of distributed systems. (Author)
Systems, networks, and computation: multivariable methods by Michael Athans ( Book )
1 edition published in 1974 in English and held by 2 WorldCat member libraries worldwide
Introduction to dynamical systems. Resistive networks and memoryless systems. Iterative methods for the solution of simultaneous equations and optimization problems. Discrete-time dynamical systems. An example of a discrete-time linear system: a quartely econometric model of the United States economy. Continuous-time dynamic networks. Continous-time dynamic systems. The relation of the state-variable and input-output description for linear time-invariant dynamical systems. Numerical integration methods. Index
On the optimal error regulation of a string of moving vehicles by W. S Levine ( Book )
2 editions published between 1965 and 1966 in English and held by 2 WorldCat member libraries worldwide
A multiloop generalization of the circle criterior for stability margin analysis by M. G Safonov ( )
1 edition published in 1981 in English and held by 1 WorldCat member library worldwide
Convergence Theories of Distributed Iterative Process: A Survey ( Book )
1 edition published in 1983 in English and held by 1 WorldCat member library worldwide
The authors consider a model of distributed iterative algorithms whereby several processors participate in the computation while collecting, possibly stochastic information from the environment or other processors via communication links. Several applications in distributed optimization, parameter estimation, and communication networks are described. Issues of asymptotic convergence and agreement are explored under very weak assumptions on the ordering of computations and the timing of information reception. Progress towards constructing a broadly applicable theory is surveyed. (Author)
Undesirable Performance Characteristics of Existing Model-Reference Adaptive Control Algorithms ( Book )
1 edition published in 1981 in English and held by 1 WorldCat member library worldwide
The full paper will describe recent theoretical results, backed up by digital computer simulation studies, that relate to the performance of several adaptive control algorithms that are based on model reference techniques. Special emphasis was placed upon the transient performance of these algorithms and the implications upon the bandwidth of the closed-loop adaptive system. The conclusions are as follows: (1) During the transient phase of the adaptation procedure, the control signal is characterized by excessive high frequency content. Novel analytical based upon stability theory can be used to predict this high frequency oscillatory behavior, which depends both upon the amplitude and frequency of the reference input. (2) During the transient adaptation phase the excessive control loop bandwidth is detrimental to system performance, because it can excite unmodeled high-frequency dynamics and lead to instability. (3) Similar effects can occur in the presence of stochastic inputs (plant noise and measurement noise). The analytical techniques that have been developed are constructive, so that modifications to the existing algorithms are suggested to overcome the practical shortcomings of the existing algorithms. Full details will be given in the conference paper. (Author)
The importance of Kalman filtering methods for economic systems by M Athans ( )
1 edition published in 1974 in English and held by 1 WorldCat member library worldwide
Fuel-optimal singular control of a nonlinear second order system by Michael Athans ( Book )
1 edition published in 1964 in English and held by 1 WorldCat member library worldwide
Studies were made on the problem of fuel-optimal control of nonlinear second order systems; one of the objectives was to determine to what extent the techniques can be extended and whether there are properties of the optimal control for nonlinear systems which differ from the corresponding ones for linear systems. As demonstrated, the nonlinear optimal system considered has singular solutions which did not arise in the case of linear systems. (Author)
A unified approach to the vehicle-merging problem by Michael Athans ( Book )
1 edition published in 1969 in English and held by 1 WorldCat member library worldwide
Distributed optimization algorithms with communications by John N Tsitsiklis ( Book )
1 edition published in 1983 in English and held by 1 WorldCat member library worldwide
This document discusses the convergence properties of asynchronous distributed iterative optimization algorithms, tolerating communication delays. The authors focus on a gradient-type algorithm for minimizing an additive cost function and present sufficient conditions for convergence. They view such an algorithm as a model of adjustment of the decisions of decision makers in an organization and we suggest that our results can be interpreted as guidelines for designing the information flows in an organization. (Author)
The Stochastic Control of the F-8C Aircraft Using the Multiple Model Adaptive Control (MMAC) Method by Massachusetts Institute of Technology ( Book )
1 edition published in 1975 in English and held by 1 WorldCat member library worldwide
The purpose of this paper is to summarize results obtained for the adaptive control of the F-8C aircraft using the so-called Multiple Model Adaptive Control method. The discussion includes the selection of the performance criteria for both the lateral and the longitudinal dynamics, the design of the Kalman filters for different flight conditions, the 'identification' aspects of the design using hypothesis testing ideas, and the performance of the closed loop adaptive system
Real time estimation and prediction of ship motions using Kalman filtering techniques by Michael S Triantafyllou ( Book )
1 edition published in 1982 in English and held by 1 WorldCat member library worldwide
Hypothesis Testing and State Estimation for Discrete Systems with Finite-Valued Switching Parameters by Chaw-Bing Chang ( )
1 edition published in 1977 in English and held by 1 WorldCat member library worldwide
This paper considers the problem of state estimation for discrete systems with parameters which may be switching within a finite set of values. In the general case it is shown that the optimal estimator requires a bank of elemental estimators with its number growing exponentially with time. For the Markov parameter case, it is found that the optimal estimator requires only N squared elemental estimators where N is the number of possible parameter values
Adaptive stochastic control for linear systems ( Book )
1 edition published in 1970 in Undetermined and held by 1 WorldCat member library worldwide
Distributed Asynchronous Deterministic and Stochastic Gradient Optimization Algorithms. Revision ( Book )
1 edition published in 1984 in English and held by 1 WorldCat member library worldwide
This document presents a model for asynchronous distributed computation and then proceed to analyze the convergence of natural asynchronous distributed versions of a large class of deterministic and stochastic gradient-like algorithms. It is shown that such algorithms retain the desirable convergence properties of their centralized counterparts, provided that the time between consecutive communications between processors and communication delays are not too large. Additional keywords: Message processing, Mathematical models, Coefficients. (Author)
On reliable control system designs by J. Douglas Birdwell ( Book )
1 edition published in 1978 in English and held by 1 WorldCat member library worldwide
This paper contains an overview of a theoretical framework for the design of reliable multivariable control systems, with special emphasis on actuator failures and necessary actuator redundancy levels. Using a linear model of the system, with Markovian failure probabilities and quadratic performance index, and optimal stochastic control problem is posed and solved. The solution requires the iteration of a set of highly coupled Riccati-like matrix difference equations; if these converge one has a reliable design; if they diverge, the design is unreliable, and the system design cannot be stabilized. In addition, it is shown that the existence of a stabilizing constant feedback gain and the reliability of its implementation is equivalent to the convergence properties of a set of coupled Riccati-like matrix difference equations. In summary, these results can be used for off-line studies relating the open loop dynamics, required performance, actuator mean time to failure, and functional or identical actuator redundancy, with and without feedback gain reconfiguration strategies. (Author)
Comments on Bounded Error Adaptive Control by D Orlicki ( Book )
1 edition published in 1984 in English and held by 1 WorldCat member library worldwide
The purpose of this note is to discuss the model matching performance of the adaptive control algorithm suggested by Peterson and Narenda. (Author)
Adaptive control with variable dead-zone nonlinearities ( Book )
1 edition published in 1984 in English and held by 1 WorldCat member library worldwide
It has been found that fixed error dead-zones is defined in the existing literature result in serious degradation of performance, dur to the conservativeness which characterizes the determination of their width. In this paper, variable width dead-zones are derived for the adaptive control of plants with unmolded dynamics. The derivation makes use of information available about the unmolded dynamics both a priori as well as during the adaptation process, so as to stabilize the adaptive loop and at the same time overcome the conservativeness and performance limitations of fixed-dead zone adaptive or fixed gain controllers. (Author)
Optimal vehicle control for the merging problem by Michael Athans ( Book )
1 edition published in 1967 in English and held by 1 WorldCat member library worldwide
 
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English (22)