Next Generation Life Support (NGLS): Variable Oxygen Regulator (VOR)
Project Introduction
The objective of the Variable Oxygen Regulator Element is to develop an oxygen-rated, contaminant-tolerant oxygen regulator to control suit pressure with a significantly increased number of pressure set points as compared to the state-of-the-art.
The Variable Oxygen Regulator (VOR) is an oxygen-rated, contaminant-tolerant oxygen regulator for space suit pressure control, with a significantly increased number of pressure set points and range as compared to the state-of-the-art. The current EMU only has two settings that are mechanically controlled through an intricate mechanical linkage. The VOR is a dual-stage regulator in which the second stage uses a stepper motor to control the amount of compression on a spring that is balanced against gas pressure and then controls the size of the orifice that feeds gas into the suit. Using a motor-driven actuator, it allows for continuous control of suit pressure over the range of 0-8.4 psid, compared to the 2 setpoints (~0.9 & 4.3) of the state-of-the-art. The enhanced performance will facilitate and improve EVA operations and prebreathe protocols, allow regulation of suit pressure to match different vehicle pressures including integration with suit ports, allow for in-suit decompression sickness treatment, minimize or eliminate prebreathe durations prior to an EVA, and provide the flexibility to run variable pressure profiles during an EVA.
Comparison of first (1.0), second (2.0) and third (3.0) generation variable oxygen regulator hardware:
VOR 1.0
- Aluminum Body
- Bench-top prototype
- Rated for nitrogen or air
- COTS components
- Vacuum/ambient
- TRL 4
VOR 2.0
- Monel Body
- Improved packaging, size
- Rated for 100% oxygen
- Contaminant tolerant
- Improved Components
- Relevant Environment
- TRL 5-6
VOR 3.0
- Monel, improved design
- Flight-like unit
- Rated for 100% oxygen
- Contamination tolerant
- Flight qualifiable components
- Controller w/interlocks
- Relevant Environment
- TRL 6
Anticipated Benefits
The Variable Oxygen Regulator will increase capabilities of next generation portable life support systems (PLSS) for new space suits under development by NASA's Human Exploration and Operations Directorate, Advanced Exploration Systems Program, Advanced Space Suit Project. Although designed for future human exploration missions, the new suit is planned to be flight tested on the International Space Station sometime before the end of the decade.
More »Primary U.S. Work Locations and Key Partners
| Organizations Performing Work | Role | Type | Location |
|---|---|---|---|
Johnson Space Center
(JSC)
|
Lead Organization | NASA Center | Houston, TX |
| Co-Funding Partners | Type | Location |
|---|---|---|
| HEOMD Advanced Exploration Systems | U.S. Government |
Primary U.S. Work Locations
-
Connecticut
-
New York
-
Texas
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Organizational Responsibility
Responsible Mission Directorate:
- Space Technology Mission Directorate (STMD)
Lead Center / Facility:
- Johnson Space Center (JSC)
Responsible Program:
- Game Changing Development
Project Management
Program Director:
Program Manager:
Project Manager:
Principal Investigator:
Co-Investigator:
- John Owczarczak
Project Duration
Technology Maturity (TRL)
| Start: | 4 |
| Current: | 5 |
| Estimated End: | 6 |
Technology Areas
Primary:
- TA 6 Human Health, Life Support, and Habitation Systems
- TA 6.2 Extravehicular Activity Systems
- TA 6.2.2 Portable Life Support System
Other / Cross-cutting:
- TA 6 Human Health, Life Support, and Habitation Systems
- TA 6.4 Environmental Monitoring, Safety, and Emergency Response