{"project":{"acronym":"","projectId":91547,"title":"Modular Portable Life Support System (PLSS) to Increase EVA Mobility and Reduce Consumables","primaryTaxonomyNodes":[{"taxonomyNodeId":10690,"taxonomyRootId":8816,"parentNodeId":10688,"level":3,"code":"TX06.2.2","title":"Portable Life Support System","definition":"The Portable Life Support Systems (PLSS) performs functions required to keep a crewmember alive during an EVA. These functions include maintaining thermal control of the astronaut, providing a pressurized oxygen (O2) environment, and removing products of metabolic output such as carbon dioxide (CO2) and water (H2O). Control of all life support functions requires a system of critical avionics to transfer and monitor data, supply and store power, provide voice and data communication, and alert IVA and EVA crew of potential system faults.","exampleTechnologies":"Closed-loop heat rejection system with zero consumables Spacesuit Water Membrane Evaporator (SWME)-radiator hybrid; heat pump radiator hybrid; closed-loop heat rejection system with zero consumables; PLSS radiator; PLSS fan; PLSS pressure sensor; closed-loop on-back regenerable CO2 and humidity control; closed-loop consumable CO2 removal, low mass; alternate CO2 sorbent; atmospheric constituent sensor; Alternate Contaminant Control Cartridge (CCC) Sorbent; CO2 and H2O membrane; battery package; integrated radio/audio system; autonomous checkout","hasChildren":false,"hasInteriorContent":true}],"startTrl":2,"currentTrl":3,"endTrl":3,"benefits":"This will inform suit/PLSS design of both current (Z-series) and next-generation suits.","description":"This proposal seeks to analyze the requirements for a modular portable life support system (PLSS) for a highly mobile, lightweight suit, and quantify mobility and bioenergetics as a function of subsystem placement for both gas-pressurized suits and advanced suit concepts. This will inform suit/PLSS design of both current (Z-series) and next-generation suits.","startYear":2014,"startMonth":8,"endYear":2016,"endMonth":8,"statusDescription":"Completed","principalInvestigators":[{"contactId":212426,"canUserEdit":false,"firstName":"Jeffrey","lastName":"Hoffman","fullName":"Jeffrey A Hoffman","fullNameInverted":"Hoffman, Jeffrey A","middleInitial":"A","primaryEmail":"jhoffma1@mit.edu","publicEmail":false,"nacontact":false}],"programDirectors":[{"contactId":84634,"canUserEdit":false,"firstName":"Claudia","lastName":"Meyer","fullName":"Claudia M Meyer","fullNameInverted":"Meyer, Claudia M","middleInitial":"M","primaryEmail":"claudia.m.meyer@nasa.gov","publicEmail":true,"nacontact":false}],"programExecutives":[{"contactId":84634,"canUserEdit":false,"firstName":"Claudia","lastName":"Meyer","fullName":"Claudia M Meyer","fullNameInverted":"Meyer, Claudia M","middleInitial":"M","primaryEmail":"claudia.m.meyer@nasa.gov","publicEmail":true,"nacontact":false}],"programManagers":[{"contactId":183514,"canUserEdit":false,"firstName":"Hung","lastName":"Nguyen","fullName":"Hung D Nguyen","fullNameInverted":"Nguyen, Hung D","middleInitial":"D","primaryEmail":"hung.d.nguyen@nasa.gov","publicEmail":true,"nacontact":false}],"projectManagers":[{"contactId":405434,"canUserEdit":false,"firstName":"Robert","lastName":"Trevino","fullName":"Robert C Trevino","fullNameInverted":"Trevino, Robert C","middleInitial":"C","primaryEmail":"robert.c.trevino@nasa.gov","publicEmail":true,"nacontact":false}],"coInvestigators":[{"contactId":357226,"canUserEdit":false,"firstName":"Nikhil","lastName":"Vadhavkar","fullName":"Nikhil Vadhavkar","fullNameInverted":"Vadhavkar, Nikhil","primaryEmail":"nikhil.vadhavkar@nasa.gov","publicEmail":true,"nacontact":false}],"website":"https://www.nasa.gov/directorates/spacetech/home/index.html","libraryItems":[],"transitions":[{"transitionId":75759,"projectId":91547,"transitionDate":"2016-08-01","path":"Closed Out","details":"The main goal of the last few years has been to fully understand the Finite Difference Time Domain Solver, Meep. This understanding involved a lot of background research into non-linear optics and how some of the constants such as the second order non-linear Kerr constant effect the propagation of light in semiconductor materials. Meep has limited documentation and what is out there is not typically geared toward the type of simulations the project needed. This caused a fair amount of trial and error, with each bug or nuance requiring hours and days of research. In order to keep future project workers from running into the same problems, it was decided that a tutorial of Meep should be made. This included all of the background research, purposes, quirks, simulations, and tutorials in both Scheme language (the language that Meep help pages use) and C++ (which I had to learn for this purpose). The tutorial ended up becoming my Master’s project because of the level of work put into it. While I am unable to continue on, someone new can now come onto the project and be brought up to speed very quickly using the tutorial and continue on finding quantitative data to support the end goal of the project. Any further elaboration can be read in the quarterly summaries.","infoText":"Closed out","infoTextExtra":"","dateText":"August 2016"}],"responsibleMd":{"acronym":"STMD","canUserEdit":false,"city":"","external":false,"linkCount":0,"organizationId":4875,"organizationName":"Space Technology Mission Directorate","organizationType":"NASA_Mission_Directorate","naorganization":false,"organizationTypePretty":"NASA Mission Directorate"},"program":{"acronym":"STRG","active":true,"description":"
\tThe Space Technology Research Grants Program will accelerate the development of "push" technologies to support the future space science and exploration needs of NASA, other government agencies and the commercial space sector. Innovative efforts with high risk and high payoff will be encouraged. The program is composed of two competitively awarded components.
","programId":69,"responsibleMd":{"acronym":"STMD","canUserEdit":false,"city":"","external":false,"linkCount":0,"organizationId":4875,"organizationName":"Space Technology Mission Directorate","organizationType":"NASA_Mission_Directorate","naorganization":false,"organizationTypePretty":"NASA Mission Directorate"},"responsibleMdId":4875,"stockImageFileId":36658,"title":"Space Technology Research Grants"},"leadOrganization":{"acronym":"MIT","canUserEdit":false,"city":"Cambridge","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"external":true,"linkCount":0,"organizationId":4877,"organizationName":"Massachusetts Institute of Technology","organizationType":"Academia","stateTerritory":{"abbreviation":"MA","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Massachusetts","stateTerritoryId":30},"stateTerritoryId":30,"murepUnitId":166683,"naorganization":false,"organizationTypePretty":"Academia"},"supportingOrganizations":[{"acronym":"JSC","canUserEdit":false,"city":"Houston","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"external":false,"linkCount":0,"organizationId":4853,"organizationName":"Johnson Space Center","organizationType":"NASA_Center","stateTerritory":{"abbreviation":"TX","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Texas","stateTerritoryId":29},"stateTerritoryId":29,"naorganization":false,"organizationTypePretty":"NASA Center"}],"statesWithWork":[{"abbreviation":"MA","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Massachusetts","stateTerritoryId":30}],"lastUpdated":"2024-2-6","releaseStatusString":"Released","viewCount":501,"endDateString":"Aug 2016","startDateString":"Aug 2014"}}