The long, slender, and flexible wings of the ALTAIR unmanned air vehicle poses a unique problem in the control system design. It is essential to account for the elastic deformation of the aircraft structure due to aer...
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ISBN:
(纸本)9781624100949
The long, slender, and flexible wings of the ALTAIR unmanned air vehicle poses a unique problem in the control system design. It is essential to account for the elastic deformation of the aircraft structure due to aerodynamic loading to accurately model the dynamic response of the aircraft in flight. An aeroservoelastic analysis is performed to predict the aircraft system stability and performance before the first flight. This paper describes the aeroservoelastic analysis procedure, results, and modifications to the control system design to ensure a safe and desirable operation of the aircraft within its flight envelope.
In the paper we describe our Integrated Fault Management System (FMS) that is currently under development. The system integrates sensor Failure Detection, Identification & Reconfiguration (FDIR), control effector ...
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Hands on robotics projects provide a wide array of educational benefits. Santa Clara University's robotics program develops a wide range of robotic systems with a level of capability and robustness that supports l...
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control dominated embedded systems, have to be designed for fast reaction to asynchronous external events occurring in the environment. Such systems must be able to perform signal emission, signal polling, preemption ...
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ISBN:
(纸本)0769518680
control dominated embedded systems, have to be designed for fast reaction to asynchronous external events occurring in the environment. Such systems must be able to perform signal emission, signal polling, preemption and priority resolution efficiently. Current microprocessors and microcontrollers, however, have no direct support for such tasks and employ indirect mechanisms such as polling (via a port) and interrupts. In this paper we propose a new processor core having architectural support for reactivity at the instruction level. The new processor core (called REFLIX) is an extension of an existing open source processor (FLIX) core with additional instructions to support reactivity. Initial benchmarking results (for some control dominated programs) show that. REFLIX performs, on an average, 5.92 times faster compared to FLIX and has 77% code size reduction when compared to some conventional processors.
Shaping command input or preshaping is used for reducing system oscillation in motion control. Desired systems inputs are altered so that the system finishes the requested move without residual oscillation. This techn...
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Shaping command input or preshaping is used for reducing system oscillation in motion control. Desired systems inputs are altered so that the system finishes the requested move without residual oscillation. This technique, developed by N.C. Singer and W.P. Seering, is used for example in the aerospace field, in particular in flexible structure control. This paper presents the study of ZV shaper for explicit fractional derivative systems (generalized derivative systems). A robustness study of ZV shaper is then presented and applied to improve second generation CRONE control response time. Results in simulation and on a DC motor bench are given.
This paper describes the development of a fully autonomous Micro Aerial Vehicle (MAV) at the Technical University of Braunschweig, Germany. After a short introduction to this subject the first part of the paper deals ...
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This paper combines an adaptive supply-voltage scheme with self-timed CMOS digital design, to achieve low power performance. The supply-voltage automatically tracks the input data rate of the data path so that the sup...
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ISBN:
(纸本)0769518680
This paper combines an adaptive supply-voltage scheme with self-timed CMOS digital design, to achieve low power performance. The supply-voltage automatically tracks the input data rate of the data path so that the supply-voltage can be kept as small as possible while maintaining the speed requirement. This adaptive supply-voltage scheme employs the handshake signals directly to detect the speed of data path without using FIFO buffer. This leads to a very simple logic control whose power loss is negligible. Cadence SPICE simulation shows the effectiveness of this scheme for low power applications based on 0.18 mum CMOS process.
We propose a practical and efficient method for adding security to network-attached disks (NADs). In contrast to previous work, our design requires no changes to the data layout on disk, minimal changes to existing NA...
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Military C2 (Command andcontrol) systems can be viewed as Complex Adaptive System (CAS), inspired by ideas from complexity theory, we introduce the multi-agent technique to cope with complexity and improve the "...
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ISBN:
(纸本)9812383433
Military C2 (Command andcontrol) systems can be viewed as Complex Adaptive System (CAS), inspired by ideas from complexity theory, we introduce the multi-agent technique to cope with complexity and improve the "intelligence" and adaptiveness of C2 systems. In this paper we describe the architecture and the development process (analysis, design and implementation) of multi-agent C2 systems (MAC2S). We also present a testbed based on High Level Architecture (HLA) simulation, which supports the testing and evaluation of MAC2S.
The proceedings contain 28 papers. The special focus in this conference is on Applications of Artificial Immune systems. The topics include: Use of an artificial immune system for job shop scheduling;an artificial imm...
ISBN:
(纸本)3540407669
The proceedings contain 28 papers. The special focus in this conference is on Applications of Artificial Immune systems. The topics include: Use of an artificial immune system for job shop scheduling;an artificial immune system for multimodality image alignment;bioinformatics data analysis using an artificial immune network;an investigation of the negative selection algorithm for fault detection in refrigeration systems;immunologic control framework for automated material handling;an immune learning classifier network for autonomous navigation;an artificial immune system approach to mutation testing;memory and selectivity in evolving scale-free immune networks;biomolecular immunocomputing;signal processing by an immune type tree transform;index design by immunocomputing;immune-based framework for exploratory bio-information retrieval from the semantic web;an artificial immune system approach to semantic document classification;a danger theory inspired approach to web mining;meta-stable memory in an artificial immune network;improved pattern recognition with artificial clonal selection;inspirations from the danger theory;artificial immune systems and the grand challenge for non-classical computation;implications for immune network models and clonal selection;revisiting the foundations of artificial immune systems and complementary dual detectors for effective classification.
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