Space Shuttle Orbiter Oxygen Partial Pressure Sensing and Control System Improvements

1992 ◽  
Author(s):  
Robert F. Frampton ◽  
Dennis M. Hoy ◽  
Kevin J. Kelly ◽  
James J. Walleshauser
Keyword(s):  
Control System ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Space Shuttle ◽  
Pressure Sensing ◽  
And Control

scholarly journals Pressure sensing and control of an aircraft passenger seat

2021 ◽  
Author(s):  
Gabriel H. Campos
Keyword(s):  
Control System ◽  
Pressure Distribution ◽  
High Surface ◽  
Distribution Data ◽  
Pressure Sensing ◽  
Surface Change ◽  
Passenger Seat ◽  
Seat Comfort ◽  
And Control ◽  
High Surface Pressure

The premise of this work is to address aircraft seat comfort. This thesis presents the development of an automatic morphing backrest used to reduce pressure experienced by the passenger from the seat. Uncomfortable, high surface pressure zones on the backrest can be alleviated by decentralizing the occupant’s weight. The improved pressure distribution is intended to decrease discomfort during flight while taking different comfort/discomfort models into consideration. Pressure distribution data from the embedded sensor mat is used to compute the seat’s cushion deflection and corresponding backrest contour caused by the passenger’s weight. The surfaces of interest - the passenger’s back and the seat, are modelled and discretized. The discretized surface contact pressure is integrated into the hyperelastic contact model to determine the loading profile. From this, the current pressure distribution and the cushion’s surface change are computed and used in the control system to create the corresponding actuation of the surface.

scholarly journals Pressure sensing and control of an aircraft passenger seat

2021 ◽  
Author(s):  
Gabriel H. Campos
Keyword(s):  
Control System ◽  
Pressure Distribution ◽  
High Surface ◽  
Distribution Data ◽  
Pressure Sensing ◽  
Surface Change ◽  
Passenger Seat ◽  
Seat Comfort ◽  
And Control ◽  
High Surface Pressure

The premise of this work is to address aircraft seat comfort. This thesis presents the development of an automatic morphing backrest used to reduce pressure experienced by the passenger from the seat. Uncomfortable, high surface pressure zones on the backrest can be alleviated by decentralizing the occupant’s weight. The improved pressure distribution is intended to decrease discomfort during flight while taking different comfort/discomfort models into consideration. Pressure distribution data from the embedded sensor mat is used to compute the seat’s cushion deflection and corresponding backrest contour caused by the passenger’s weight. The surfaces of interest - the passenger’s back and the seat, are modelled and discretized. The discretized surface contact pressure is integrated into the hyperelastic contact model to determine the loading profile. From this, the current pressure distribution and the cushion’s surface change are computed and used in the control system to create the corresponding actuation of the surface.

Thermal Budget Reduction for Back-end Compatibility and Control of Resistance Switching Mechanism (Unipolar to Bipolar) in Pr1-xCaxMnO3 (PCMO) RRAM

2013 ◽  
Vol 1507 ◽  
Author(s):  
Neeraj Panwar ◽  
Gurudatt Rao ◽  
N. Ravi Chandra Raju ◽  
Rajashree Nori ◽  
Pankaj Kumbhare ◽  
...  
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Memory Performance ◽  
Deposition Process ◽  
Budget Process ◽  
Thermal Budget ◽  
Bipolar Switching ◽  
Budget Reduction ◽  
Low Thermal Budget ◽  
And Control

ABSTRACTA low thermal budget process for back-end compatible PCMO based RRAM cell is essential for 3D stacked memory. In this paper, we investigate two strategies to engineer low thermal budget processing for bipolar switching - (i) deposition engineering i.e. based on deposition temperature and oxygen partial pressure, (ii) post deposition anneal i.e. based on inert anneal of room temperature deposited PCMO film.. We demonstrate that both deposition and anneal shows a transition temperature above which bipolar switching is realized. Oxygen partial pressure is a key deposition process parameter. As oxygen partial pressure is reduced memory window increases, however beyond an optimal O2 partial pressure, unipolar switching is observed. Inert anneal is more effective in thermal budget reduction as N2/550°C/2min anneal has same memory performance as 650°C/2hour deposition process.

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