Reliable flight computer for sounding rocket with dual redundancy: design and implementation based on COTS parts

2017 ◽  
Vol 8 (3) ◽  
pp. 560-571 ◽  
Author(s):  
Ghasem Kahe
Keyword(s):  
Sounding Rocket ◽  
Design And Implementation ◽  
Redundancy Design ◽  
Flight Computer

Design and Implementation of Redundant Sensors in Active Magnetic Bearing

2017 ◽  
Author(s):  
Zhengang Shi ◽  
Jiaji Yang ◽  
Ni Mo ◽  
Xingnan Liu ◽  
Yan Zhou
Keyword(s):  
High Reliability ◽  
Short Circuit ◽  
Stability Control ◽  
Magnetic Bearing ◽  
Active Magnetic Bearing ◽  
Displacement Sensor ◽  
Special Equipment ◽  
Design And Implementation ◽  
Displacement Sensors ◽  
Redundancy Design

With the advantages of frictionless, no need of lubrication, no pollution, low consuming and long life, active magnetic bearing (AMB) is applied in the primary helium circulator of the High Temperature Gas-Cooled Reactor-Pebble bed Module (HTR-PM), which is under construction in Shidao Bay Nuclear Power Plant. Active magnetic bearing is a typical mechatronic system with interconnection of mechanical and electronic components with the function of picking up signals, processing and producing. Displacement sensor is an important component to pick up signals for stability control, and also the most susceptible part to fail due to variation of air temperature and vibration of high rotation speed. However, rotating system can’t run normally if a single sensor fails in AMB without redundancy design. For security considerations, higher reliability is required in some special equipment, especially in primary helium circulator of HTR-PM. Design and implementation of redundant sensors is an effective method. This paper reviewed the present research of fault diagnosis and redundant control of displacement sensors, simulation of coil’s short-circuit and open-circuit fault was made with MATLAB/SIMULINK. Parameters were optimized for fault diagnostic circuit by Multisim. Based on the high reliability demand, redundancy design was applied both on structure and control system in AMB. Schematic drawing and PCB board were finished by Altium Design, and experiments were carried out. The result showed that if the coils of sensor failed, AMB system could still work normally by switching to the redundant sensors automatically.

Observed and Theoretical Spectra in the 10–100Å Interval

1988 ◽  
Vol 102 ◽  
pp. 259-261
Author(s):  
W.A. Brown ◽  
M.E. Bruner ◽  
L.W. Acton
Keyword(s):  
Sounding Rocket ◽  
Full Spectrum ◽  
X Ray

AbstractThe soft x-ray spectra recorded in two sounding rocket flights in 1982 and 1985 are compared with with predicted spectra. The poster presents the processed densitometer trace of the full spectrum together with the new spectrum from the 1985 experiment. This note compares the intensities of the lines with predictions.

AAC Considerations for Individuals With Angelman Syndrome

2015 ◽  
Vol 24 (3) ◽  
pp. 106-113 ◽  
Author(s):  
Stephen N. Calculator
Keyword(s):  
Angelman Syndrome ◽  
Augmentative And Alternative Communication ◽  
High Tech ◽  
Alternative Communication ◽  
Design And Implementation

Purpose To provide an overview of communication characteristics exhibited by individuals with Angelman Syndrome (AS) and special considerations associated with the design and implementation of augmentative and alternative communication (AAC) programs. Method Results of recent studies exploring individuals' uses of AAC are reviewed, with particular emphasis on factors related to individuals' acceptance and successful uses of AAC systems. Results Not applicable Conclusion Despite their inconsistent access to practices previously found to foster individuals' acceptance of AAC systems, individuals with AS demonstrate the ability to use AAC systems, including high-tech AAC devices, successfully.

Design And Implementation Of An Integrated Mental Health Intervention In A Policing Context

2017 ◽  
Author(s):  
Alicia Papas ◽  
Anthony D. LaMontagne ◽  
Allison J. Milner ◽  
Amanda Allisey ◽  
Andrew J. Noblet ◽  
...  
Keyword(s):  
Mental Health ◽  
Health Intervention ◽  
Mental Health Intervention ◽  
Design And Implementation ◽  
Integrated Mental Health
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