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Monday Tuesday Wednesday Thursday Friday. Technical Program for Monday August 29, Filtering I Regular Session. Cea Garrido, Mauricio Esteban. This paper develops a robust extended Kalman filter for nonlinear uncertain systems with a deterministic description of noise and uncertainty.

The system state dynamics are formulated in reverse time and the uncertainties are modeled algebrs terms of sum quadratic constraints. The robust filtering problem is formulated as a set-valued state estimation problem which is recast into an optimal control problem. Sml solution of the resulting Hamilton-Jacobi-Bellman equation is obtained by using a quadratic agebre. This leads to an approximate information state for the filtering problem which is computed recursively through a difference Riccati equation derived by linearizing the observation equation and using a quadratic approximation to the system dynamics.

The reduction of the robust estimator to the standard Kalman filter in the uncertainty-free linear case is also discussed. The paper deals with state estimation of nonlinear stochastic dynamic systems.

Traditional filters providing local estimates of the states, such as the extended Kalman filter, unscented Kalman filter or the cubature Kalman filter, are based on approximations which lead to biased estimates of the alhebre and measurement statistics.

contrôles d’algèbre 2 smpc s2 fsr

The aim of the paper is to propose a new local filter that utilises a randomised unscented transformation which is a special case of stochastic integration rules providing an unbiased estimate of an integral. The new filter provides estimates of higher quality than the traditional filters and renders a randomised version of the unscented Kalman filter.

The proposed filter is illustrated in a numerical example. Numerical Differentiation on Irregular Gridspp. In this article, we propose a msp numerical differentiation method from irregularly sampled data, in a noisy environment. The method extends to irregular grids our previous work and it relies on the same spirit as the algebraic numerical differentiators due to M. We provide a least squares interpretation of the developed estimators as well as a discrete implementation scheme.

Several numerical simulations are presented to asses the performance of the proposed differentiators. In this paper, a risk-sensitive filter for a class of jump Markov nonlinear systems is proposed. By using a set of weighted cubature points to approximate the intractable risk-sensitive recursions, the proposed filter could exhibit improved numerical stability with respect to the derivation of the square-root covariance, for which the unscented transform technique might halt the operations due to the presence of non-positive definite covariance.

The performance of the proposed filter is illustrated through a simulation study of tracking a land vehicle with maneuvers. It is well know that, for linear gaussian processes, the Kalman Filter provides an elegant solution to the recursive state estimation problem. However, when the process is nonlinear, then one needs to use various approximations to the filtering problem. In this paper we describe a new approach to nonlinear filtering based onMinimumDistortion Filtering.

At the core of this algorithmis skp deterministic on-line griding technique based on Vector Quantization. We explore dmp practical issues associated with the algorithmwhich are necessary to ensure that it runs effectively. We also present several examples which illustrate the utility of this class of algorithm in the context of nonlinear state estimation.

We address sampled data non-linear filtering problems where there is an underlying continuous-time system. In the case of linear systems, it is well known that there is an exact discrete model that describes the second order properties at the sampling instants. However, in the nonlinear case, one must use an approximate model. In practice, msp Euler expansions are typically used. However, an Euler model is known to give a poor approximation especially with moderate sample period. Here we propose a resolution of this difficulty via the use of an up-sampling strategy.


We show that, as the up-sampling rate increases, then in the linear case the up-sampled filter converges to the true filter. We illustrate by an example. Hawthorn, Victoria,AUS. A challenge for engineers is how to design systems that work effectively in algehre complicated world. Five key characteristics of modern computing environments that need to be taken into account when building systems are: This is sometimes summarised as systems being dynamic.

A desirable attribute for software within a dynamic system is adaptivity.

As the world changes, our software ideally should evolve to reflect the wmp. As new facts enter the world, the software should not break. An obvious area where adaptivity is essential is security.

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How do the system know how to adapt in response to new events and situations? There has to be some purposefulness that the system can refer to. An additional attribute that I strongly advocate is that the software should be understandable in its design and purpose.

We need ways of thinking about and describing software which simplifies complexity, at least in regarding to describing behaviour. The subject of this paper is solving the adaptive dynamic controller design problem for multi-agent systems with structural and parametric uncertainty for the zmp when derivatives of input and output parameters wlgebre be measured. The algebrf of the designed control systems subject to non-measurable bounded disturbances is presented. Only the measurable variables of the local subsystems are used to generate the control actions, therefore control is completely decentralized.

Some of the fundamental capabilities required by autonomous vehicles and systems for their intelligent decision making are: The paper formulates a discrete agent framework that abstracts and controls a hybrid system that is a composition of hybrid automata modelled continuous individual processes. Theoretical foundations are laid down qlgebre a class of general model composition agents MCAs with an advanced subclass of rational physical agents RPAs.

We define MCAs as the most basic structures for the description of complex autonomous robotic systems. The RPA’s have logic based decision making that is obtained by an extension of the hybrid systems concepts using a set of abstractions. The theory presented helps the creation of robots with reliable performance and safe operation in their environment. The paper emphasizes the abstraction aspects of the overall hybrid system that emerges from parallel composition of sets of RPAs and MCAs.

The algebee in creating software for modern complex and distributed computing environments are algebde, uncertainty, unpredictability, and openness. It is a problem how to design systems that work effectively in the modern environment, where computing is pervasive, people interact with technology existing in a variety of networks, and under a range of policies and constraints imposed by the institutions and social structures that we live in.

The key concepts we use for designing open, adaptive, distributed, and self-managing systems are agents and sociotechnical systems. An agent is suitable as a central modelling abstraction for representing distributed interconnected nodes of the modern world.

A sociotechnical system encompasses a combination of people and computers, hardware and software, many of which can be viewed as agents. This article addresses the bottom-up development of spm systems as adaptive multi-agent systems. We claim that the methods for designing adaptive multi-agent systems should be borrowed from social zlgebre rather than from exact sciences.

In particular, we propose a solution for developing flexible multi-agent systems in such a way that an environment does algebde have to be analysed in all its complexity. This paper examines decision methods applied to a distributed system that must operate collaboratively to achieve a common objective and tolerate partial system failure, necessitating structural reorganization. The problem addressed is controlled and cooperative action of multiple physical agents in a space environment, tasked with forming an interferometer, maximizing the interferometer lifetime by staged placement of resources and maintaining optimality in the presence of individual agent failures.


Whilst a seemingly niche application, the methods developed and analyzed are equally valid lagebre any multiplephysical agent system such algebrw UAVs or AUVs.

Centralized optimization methods will be applied to form decisions in addition to a distributed contract-net like decision method, wherein an auction system is adopted to form group decisions. These methods are investigated for the practicality of applying such methods to an engineering system. Networked Control Systems Regular Session. A networked control system NCS is a control system in which plants, sensors, controllers, and actuators are connected through communication networks.

In this paper, as one of the design problems for NCSs, we consider optimal sampled-data control of linear systems with uncertain input delay and uncertain sampling period. First, an input delay system is transformed into a discrete-time system with parameter uncertainty.

Furthermore, the obtained system is expressed as a mixed logical dynamical model by using our previously proposed modeling method. Next, a given continuous-time cost function is transformed into a discrete-time cost function with parameter uncertainty, and the optimal control problem is approximately expressed as a mixed integer programming problem.

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This article addresses the Linear Quadratic Gaussian LQG optimal control problem for networked control systems when data is transmitted through a TCP-like network and both measurement and control packets are subject to random transmission delays and packet dropouts. The stabilizability conditions of the system are then derived. Simulation results are presented to demonstrate the effectiveness of the proposed approach.

This paper deals with the dissipative problem for uncertain time-delay networked control systems with both multiple measurement and control packet dropouts. The uncertainty is assumed to satisfy a dissipative inequality, smmp the multiple measurement and control packet dropouts are described by two independent Bernoulli distributed sequences.

The sufficient condition on the existence of the controller is formulated in the form of linear matrix inequalities. Then the controller gain is achieved by using s22 extended algdbre complementarity linearization method.

An example is given to illustrate the effectiveness of the proposed design method. We investigate a networked control architecture for LTI plant models with a scalar input. Communication from controller to actuator is over an unreliable network which introduces packet dropouts. To achieve robustness against s, we adopt a packetized predictive control paradigm wherein each control packet transmitted contains tentative future plant input values. The novelty of our approach is that we seek that the control packets transmitted be sparse.

We s show how to choose parameters of the cost function to ensure that the resultant closed loop system be practically stable, provided the maximum number of consecutive packet dropouts is bounded. A numerical example illustrates that sparsity reduces bit-rates, thereby making our proposal suited to control over unreliable and bit-rate limited networks.

The use of a communication network in the transmission of control system signals measurements and actuation is becoming more widespread. If the communication or the sensors and actuators themselves can be modified by a malicious agent then the control of the physical plant can be covertly amp.

A parameterised decoupling structure is introduced which allows the covert agent a wide range of control actions on the physical plant while remaining undetectable from the point allgebre view of the original networked controller. The designer of the covert agent need only have a model of the physical plant; knowledge of the networked controller is not required. A MIMO process control example based on the control of irrigation canals is used to illustrate the concepts. The stability analysis and stabilization of networked control systems subject to data loss and time-varying transmission algbere are explored.