KINFIDA (knowledge-based intelligent filter design assistant), a hybrid knowledge-based system with a model-based reasoning architecture for digital filter design, is described. It extends the concept of an isolated d...
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KINFIDA (knowledge-based intelligent filter design assistant), a hybrid knowledge-based system with a model-based reasoning architecture for digital filter design, is described. It extends the concept of an isolated digital signal processing CAD tool and provides a closed-loop design environment where the system expertise can grow incrementally with minimal effect on the controls and the reasoning process. It utilizes IEEE signal processing libraries and is implemented in Nexpert Object, a commercial object-rule-based development system. The user interface is implemented using the X11 toolkit package. Using an interactive human interface, KINFIDA suggests likely filter approaches, estimates undetermined parameters, provides performance estimates, and suggests candidate VLSI technologies satisfying a desired filtering operation.< >
A reliable specification and execution tool (RSET) that supports a rigorous object-oriented constraint-based specification method called box structures for object-oriented development (Box Structures/OOD) is described...
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A reliable specification and execution tool (RSET) that supports a rigorous object-oriented constraint-based specification method called box structures for object-oriented development (Box Structures/OOD) is described. RSET also supports the simulation of systems from their specifications. The object-oriented paradigm employs concepts such as object classification, relationships between objects, and constraints on objects, that are natural to human discourse. In all cases, there is exactly a one-to-one correspondence between objects in the specification and the specifier's view of the objects in the system being specified. There is a straightforward mapping from the specification to an Ada implementation. The specifications are formal and support automatic consistency and completeness checking. The specifications are executable, allowing systems to be simulated at the specification level. Box Structures/OOD is uniformly applicable to the specification, design, and implementation of large complex software systems (e.g. real-time, distributed, parallel).< >
Structured analysis and rigorous modeling are necessary for the design of complex automation projects. This paper is an introduction to the features and benefits of some major structured analysis techniques currently ...
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Structured analysis and rigorous modeling are necessary for the design of complex automation projects. This paper is an introduction to the features and benefits of some major structured analysis techniques currently being used in industrial settings. These are scenario building, object-oriented analysis, concurrent engineering and prototyping, probabilistic risk assessment, issue-based information system (IBIS), and state transition analysis.
The authors provide a quantitative performance comparison of selected digital transmission schemes proposed for providing reliable communication on two-wire twisted-pair digital subscriber loops in support of ISDN (in...
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The authors provide a quantitative performance comparison of selected digital transmission schemes proposed for providing reliable communication on two-wire twisted-pair digital subscriber loops in support of ISDN (integrated services digital network) services. More specifically, they consider the bit error probability (BEP) performance of both hybrid adaptive echo cancellation (HAEC) and time compression multiplexing (TCM) schemes employing either AMI or 2B1Q line codes. The modeling assumptions are carefully described and used to develop a quantitative relative-performance evaluation methodology. Numerical results illustrate the nature of the performance trade-offs as a function of channel and system design parameters. These results are useful in characterizing the parameter choices when there is a clear preference for one system over another.< >
The electronic implementation of neuromorphic systems requires technologies well matched to the functions of storage and the computation of sums of products. Additional requirements are low-power, high fan-out capabil...
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The electronic implementation of neuromorphic systems requires technologies well matched to the functions of storage and the computation of sums of products. Additional requirements are low-power, high fan-out capability and high-density interconnect. Massive parallelism and redundancy mitigate the accuracy limitations of analog circuits and force consideration of analog and analog-digital components for network realization. Adaptive neuromorphic networks have the potential for self-organization and learning in speech and image understanding systems requiring minimal human intervention.< >
Proceedings, consisting of three volumes, incorporates a total of 175 papers. These are grouped according to the following topics: simulation in design, knowledge-based systems, simulation in manufacturing, robotics i...
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Proceedings, consisting of three volumes, incorporates a total of 175 papers. These are grouped according to the following topics: simulation in design, knowledge-based systems, simulation in manufacturing, robotics in education, robot planning and control, robot modeling, multisensor integration in robotics, computer-aided manufacturing, computer sensors and imaging, optimization in manufacturing, CAD/CAM integration, CAE applications, computational geometry and design, flexible manufacturing, real-time scheduling, CAM applications, CAD applications, CAD/CAM, applied computer methods in mechanics, energy systems, teaching CAD, course enhancements through software, combustion modeling, finite element methods, fluid dynamics, interactive graphics, and structural vibrations.
This paper presents the design of a simple digital servomotor control algorithm used to simulate human motion in the testing of rehabilitation/exercise equipment performance. design performance specifications were det...
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This paper presents the design of a simple digital servomotor control algorithm used to simulate human motion in the testing of rehabilitation/exercise equipment performance. design performance specifications were determined to simulate typical human motion torque and dynamics. The motor was modelled mathematically, and the parameters of the model were obtained from a step input response. The minimal prototype method was used to obtain a digital control algorithm, which was implemented in the FORTH language on a PDP 11/23 computer.
The authors address the design, tuning and experimental qualitative performance properties of three different digital feedback controllers for (1) discrete lead-lag controllers that modulate pulse width only (with con...
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The authors address the design, tuning and experimental qualitative performance properties of three different digital feedback controllers for (1) discrete lead-lag controllers that modulate pulse width only (with constant amplitude and frequency) for force regulation;(2) controllers which simultaneously modulate pulse width and interpulse interval for force regulation;and (3) controllers which use pulse width modulation to regulate joint stiffness, using feedback of force and position. Experimental results using intramuscular electrodes in different cat muscles and in the human upper extremity are calculated for qualitative performance factors including rise time and setting time, oscillations and steady-state error in response to step and ramp commands as well as robustness of the various controllers (i. e. , insensitivity to disturbances, muscle modeling errors and changes in muscle properties due to fatigue and potentiation).
The 68 papers comprising the Proceedings deal with digital avionics, electronic warfare, navigation, engineering management, signal and sensor processing, digital flight control, integrated electronics, modeling the h...
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The 68 papers comprising the Proceedings deal with digital avionics, electronic warfare, navigation, engineering management, signal and sensor processing, digital flight control, integrated electronics, modeling the human visual system, air vehicle related electronics, aerospace systems electrical interfaces, aerospace electrical power developments, and design for reliability and cost effectiveness. Following is a list of titles and authors. DAIS: The First Step. By John C. Ruth. Software - From Satan to Saviour. By W. Lynn Trainor. System Architecture for Aircraft Avionic and Electrical Systems. By John G. Gregory. Black Box Approach - Here to Go. By J. A. Hastings. Constant Index Lens Antenna. By Edwin M. Turner. Management Concepts for a Multifunction Aperture. By E. A. Nelson and D. D. Niebruegge. digital Elint Parameter Analyzer. By J. C. Eby, Jr. Simulation's Role in OCM Vulnerability Evaluation. By Frederick H. Lund. Solid State Null Tracking Doppler Sensor. By L. Weinberg and J. W. Creutz. Calibrating the Drift Rates of Strapdown Electrostatic Gyroscopes. By Angus Andrews. Strapdown Inertial Navigation Practical Considerations. By H. Halamandaris. LN-33 Inertial Navigation System. By Richard S. Throckmorton. Austere Navigation Data Processor and Display. By Derryl A. Williams.
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