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Featured researches published by Robert Wichowski.


43rd International Conference on Environmental Systems | 2013

Rapid Cycle Amine (RCA 2.0) System Development

Cinda Chullen; Colin Campbell; William Papale; Kevin G. Hawes; Robert Wichowski

The Rapid Cycle Amine (RCA) system is a low-power assembly capable of simultaneously removing carbon dioxide (CO2) and humidity from an influent air steam and subsequent regeneration when exposed to a vacuum source. Two solid amine sorbent beds are alternated between an uptake mode and a regeneration mode. During the uptake mode, the sorbent is exposed to an air steam (ventilation loop) to adsorb CO2 and water (H2O) vapor, whereas during the regeneration mode, the sorbent rejects the adsorbed CO2 and H2O vapor to a vacuum source. The two beds operate such that while one bed is in the uptake mode, the other is in the regeneration mode, thus continuously providing an on-service sorbent bed by which CO2 and humidity may be removed. A novel valve assembly provides a simple means of diverting the process air flow through the uptake bed while simultaneously directing the vacuum source to the regeneration bed. Additionally, the valve assembly is designed to allow for switching between uptake and regeneration modes with only one moving part while minimizing gas volume losses to the vacuum source by means of an internal pressure equalization step during actuation. The process can be controlled by a compact, low-power controller design with several modes of operation available to the user. Together with NASA Johnson Space Center, Hamilton Sundstrand Space Systems International, Inc. has been developing RCA 2.0 based on performance and design feedback on several sorbent bed test articles and valve design concepts. A final design of RCA 2.0 was selected in November 2011 and fabricated and assembled between March and August 2012, with delivery to NASA Johnson Space Center in September 2012. This paper provides an overview of the RCA system design and results of pre-delivery testing.


42nd International Conference on Environmental Systems | 2012

Development of the Self-Powered Extravehicular Mobility Unit Extravehicular Activity Data Recorder

Craig Bernard; Terry R. Hill; Sean Murray; Robert Wichowski; David Rosenbush

The Self-Powered Extravehicular Mobility Unit (EMU) Extravehicular Activity (EVA) Data Recorder (SPEEDR) is a field-programmable gate array (FPGA)-based device designed to collect high-rate EMU Primary Life Support Subsystem (PLSS) data for download at a later time. During EVA, the existing EMU PLSS data downlink capability is one data packet every 2 minutes and is subject to bad packets or loss of signal. Higher-rate PLSS data is generated by the Enhanced Caution and Warning System but is not normally captured or distributed. Access to higher-rate data will increase the capability of EMU anomaly resolution team to pinpoint issues remotely, saving crew time by reducing required call-down Q&A and on-orbit diagnostic activities. With no Space Shuttle flights post Fiscal Year 2011 (FY11), and potentially limited down-mass capability, the ISS crew and ground support personnel will have to be capable of on-orbit operations to maintain, diagnose, repair, and return to service EMU hardware, possibly through 2028. Collecting high-rate EMU PLSS data during both intravehicular activity (IVA) and EVA operations will provide trending analysis for life extension and/or predictive performance. The SPEEDR concept has generated interest as a tool/technology that could be used for other International Space Station subsystems or future exploration-class space suits where hardware reliability/availability is critical and low/variable bandwidth may require store then forward methodology. Preliminary work in FY11 produced a functional prototype consisting of an FPGA evaluation board, custom memory/interface circuit board, and custom software. The SPEEDR concept includes a stand-alone battery that is recharged by a computer Universal Serial Bus (USB) port while data are being downloaded.


Archive | 2004

PROJECTILE RESISTANT ARMOR

W. Clark Dean; Kevin G. Hawes; Robert Wichowski; Thinh Pho


Archive | 2009

COMPACT FPGA-BASED DIGITAL MOTOR CONTROLLER

Robert Wichowski


Space | 2006

Toward Human-Robot Interface Standards II: An Examination of Common Elements in Human-Robot Interactions Across the Space Enterprise

Jeffrey Ferketic; Loel Goldblatt; Edward Hodgson; Sean Murray; Robert Wichowski; Wendell H. Chun; Arthur Bradley; Terrence Fong; John Evans; Randy Stiles; Michael A. Goodrich; Aaron Steinfield; Dan king; Catherine Erkorkmaz


international conference on evolvable systems | 2006

Toward Human-Robot Interface Standards: Use of Standardization and Intelligent Subsystems for Advancing Human-Robotic Competency in Space Exploration

Jeffrey Ferketic; Loel Goldblatt; Edward Hodgson; Sean Murray; Robert Wichowski; Arthur Bradley; Terrence Fong; Wendell H. Chun; Randy Stiles; John Evans; Michael A. Goodrich; Aaron Steinfeld


Archive | 2014

Variable link sensorless brushless direct current motor controller for space and hardened applications

Harold J. Hansen; Robert Wichowski; Kevin G. Hawes; Patrick J. Sears


Archive | 2017

Sensor and control systems for electrical machines

Robert Wichowski; Patrick J. Sears; Kevin G. Hawes


Archive | 2017

DIGITAL MOTOR CONTROLLER STABILITY ANALYSIS TOOL

Robert Wichowski; Kevin G. Hawes; Michael A. O'toole


Archive | 2016

SYNCHRONIZATION MODULE FOR MOTOR SPEED CONTROL

Robert Wichowski; Kevin G. Hawes; Patrick J. Sears; Sean Murray

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