作者：
S.V. GaikwadD.E. RiveraDepartment of Chemical
Bio and Materials Engineering and Control Systems Engineering Laboratory Computer-Integrated Manufacturing Systems Research Center Arizona State University Tempe AZ USA
control-ID is a computer aided controlengineering (CACE) tool serving as a support environment for computer aided control system design (CACSD) in the chemical process industry. The fundamental basis for this tool is...
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control-ID is a computer aided controlengineering (CACE) tool serving as a support environment for computer aided control system design (CACSD) in the chemical process industry. The fundamental basis for this tool is the theory of control-relevant system identification, which takes advantage of the interplay between identification and control design. control-ID is implemented using MATLAB on a VAXStation 4000 cluster, which is integrated in real-time to an industrial-scale Honeywell TDC 3000 plant information and control system. control action is computed on the TDC 3000 system using low-order difference equations, which yield superior performance over traditional PID control while resembling the behavior of model predictive controlsystems. Results from a simulation study using a gas/oil furnace are reported.< >
This paper presents experimental results on empirical nonlinear models (of the Hammerstein type) for a reactive ion etcher. A nonlinear tracking controller design based on the nonlinear model was implemented. Experime...
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This paper presents experimental results on empirical nonlinear models (of the Hammerstein type) for a reactive ion etcher. A nonlinear tracking controller design based on the nonlinear model was implemented. Experimental data on the performance of the control system is also included.
In this paper a fast spatial adaptive algorithm is presented for the efficient least squares (LS), autoregressive exogenous (ARX), two-dimensional (2-D) modeling. Filter masks of general boundaries are allowed. Effici...
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In this paper a fast spatial adaptive algorithm is presented for the efficient least squares (LS), autoregressive exogenous (ARX), two-dimensional (2-D) modeling. Filter masks of general boundaries are allowed. Efficient space updating recursions are developed by exploiting the spatial shift invariance property of the 2-D data set.< >
In many discrete-event systems (DES) both state and event information are of importance to the systems designer. As a first step towards obtaining hierarchical models of systems, the behavior of DESs with unobservable...
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In many discrete-event systems (DES) both state and event information are of importance to the systems designer. As a first step towards obtaining hierarchical models of systems, the behavior of DESs with unobservable transitions and state output maps is considered. Observers for deterministic DES are generalized to nondeterministic DES and characterized using the join semi-lattice of compatible partitions of a transition system. This characterization points to efficient algorithms for computing both strong and weak state-event observers as solutions to the relational coarsest partition problem. The strong and weak observation equivalences of Milner are shown to be special cases of our observers under the trivial (constant) state output map.< >
In this paper a novel algorithm is presented for the efficient two-dimensional (2-D) symmetric noncausal finite impulse response (FIR) filtering and autoregressive (AR) modeling. Symmetric filter masks of general boun...
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In this paper a novel algorithm is presented for the efficient two-dimensional (2-D) symmetric noncausal finite impulse response (FIR) filtering and autoregressive (AR) modeling. Symmetric filter masks of general boundaries are allowed. The proposed algorithm offers the greatest maneuverability in the 2-D index space in a computational efficient way. This flexibility can be taken into advantage if the shape of the 2-D mask is not a priori known and has to be dynamically configured.< >
The problem of modeling dynamic systems using fuzzy relational systems is investigated. A dynamic system is modeled using a static fuzzy relational system where the dynamics is brought into the model by tapped delay l...
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The problem of modeling dynamic systems using fuzzy relational systems is investigated. A dynamic system is modeled using a static fuzzy relational system where the dynamics is brought into the model by tapped delay lines. Both the internal and the external feedback topology are relayed. It is shown that in the limit the internal feedback topology can generate a null linguistic representation of the state in the absence of normal fuzzy sets at the inputs of the static model. For handling this several schemes are considered, namely it is advocated the use of pretuned fuzzy model I/O interfaces as regenerative devices. A case study is presented.< >
This paper explores an inherent feedback limitation of using decentralized LTI control on a two-input, two-output LTI plant. The result is motivated by, and illustrated on, a reactive ion etcher.
This paper explores an inherent feedback limitation of using decentralized LTI control on a two-input, two-output LTI plant. The result is motivated by, and illustrated on, a reactive ion etcher.< >
In mobile radio networks, receiver capture is known to enhance the performance of the slotted ALOHA random access protocol substantially. The efficiency of narrowband slotted ALOHA radio networks can be further enhanc...
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In mobile radio networks, receiver capture is known to enhance the performance of the slotted ALOHA random access protocol substantially. The efficiency of narrowband slotted ALOHA radio networks can be further enhanced by using sector antennas. The paper investigates the effect of partially overlapping, realistic antenna patterns which gives highly correlated received power levels at different receiver branches. The author proposes a method for computing the joint throughput from two base station antennas. The a posteriori information provided by the event of one message capturing one antenna is used to find conditional probabilities of capturing the other antennas. Any overlap in the antenna patterns decreases the throughput, but transmissions from the overlap area face a larger probability of capture than signals from directions in which only one antenna has significant gain.
Al planning systems must be able to update their internal model of the domain in order to determine the effects of a possible action. The most widely used update method is the STRIPS operator. STRIPS operators are ext...
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A two-stage multiuser detector for the code division multiple access environment employing a combination of a decorrelator and a nonlinear multiuser interference canceler is considered. The weights of the canceler are...
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