Talk:NASA Docking System

LIDS is dead, long live iLIDS
"The NASA Docking System (NDS) is NASA’s implementation for the emerging International Docking System Standard (IDSS) using low impact docking technology. The NASA Docking System Project (NDSP) is the International Space Station (ISS) Program’s project to produce the NDS, Common Docking Adapter (CDA) and Docking Hub. The NDS design evolved from the Low Impact Docking System (LIDS). The acronym international Low Impact Docking System (iLIDS) is also used to describe this system as well as the Government Furnished Equipment (GFE) project designing the NDS for the NDSP. NDS and iLIDS may be used interchangeability."

http://dockingstandard.nasa.gov/Documents/JSC-63686_iLIDS_PTRS_Rev_C.pdf

--Craigboy (talk) 10:03, 27 February 2011 (UTC)


 * I've been slowly converting the article to iLIDS, I'll probably be done and post it late Sunday night (U.S.)--Craigboy (talk) 23:24, 12 March 2011 (UTC)


 * I don't have any problem with converting it to the newer standard (iLIDS), but since Wikipedia is not merely about current events and current designs but is rather an encyclopedia, I think it important that the historical LIDS design, with citations and description of how it was when it existed and who "used" it (in designs and vehicle concepts) it during that time period, be left in the Wikipedia article. I have not (yet) looked at the article changes to see if we have begun to lose important history from the LIDS era.  What do you think about the concept I've tried to briefly articulate here?  N2e (talk) 13:16, 13 March 2011 (UTC)


 * I just saved and went to the talk page to update, I apologize for not seeing your comment in time. The reason why I converted the page instead of creating a new one is because much of the information is the same and I *think* the only difference with iLIDS is a different sized diameter. Also I tried to keep as much information as possible from the older article.--Craigboy (talk) 19:57, 13 March 2011 (UTC)

http://www.nasa.gov/pdf/732505main_TechUp_2012_pages.pdf

Hubble Space Telescope's Soft-Capture Mechanism and iLIDS
Q."During a previous Hubble repair mission (STS-125), a passive version of the LIDS was installed. Is the NDS system compatible with that hardware?"

A: "No, the Soft Capture System diameter is different for Hubble; the IDSS changed the diameter."

http://dockingstandard.nasa.gov/Meetings/TIM_%28Nov-17-2010%29/Docking_TIM_Questions_Hatfield.pdf

Needs to be added but I don't know how to do it without breaking the flow of the article.--Craigboy (talk) 20:15, 13 March 2011 (UTC)

NDS redesign (SIMAC)
Now looks identical to APAS but with different electrical connectors. It is compatible with IDSS

There is something apparently called 'International Docking System Block II'. I assume it's referring to NDS but I'm unsure exactly to wait "Block II" means. "NASA Docking System Block 1 making progress and completed PDR". 

"Beginning FY14 study with ISS Program to evaluate Block I to Block II: • Voltage and avionics • Deep space environment • Mass reduction opportunities • Overall system design efficiency"

http://www.nasa.gov/sites/default/files/files/05-Stich_Building_Human_Spaceflight_Exploration_Capabilities.pdf

--Craigboy (talk) 09:35, 21 July 2014 (UTC)


 * Revision C of the NDS Interface Definition Document increased the passage width to 800 mm and made the petals compulsory. There may be other changes that need including in the article.  Also electrical interfaces are now defined. Andrew Swallow (talk) 21:55, 19 July 2014 (UTC)


 * That's incorrect, it's revision C of the IDSS IDD (released Nov 2013). The most resent revision of the NDS IDD that I've seen is revision H (released Nov 2013). Unfortunately revision H of the NDS IDD can currently only be obtained through a FOIA request and sharing any information within the document is against U.S. export control laws. It has lot's of info and pictures. We may be able to get a redacted version without export restrictions but I don't know how we would go about doing that.--Craigboy (talk) 09:35, 21 July 2014 (UTC)

Some info found in Feasibility of the SIMAC for the NASA Docking System. In April 2012, NASA International Space Station (ISS) Program management initiated a Change Directive to Boeing that authorized and funded a study to determine if a less complex docking system could be implemented for use as the NASA Docking System that both met the international community’s desire for a narrow soft capture system ring width, as well as providing the ISS a simpler active docking system compared to the then-current iLIDS design.

While the focus of NASA’s Change Directive was clearly on an alternate for the soft capture system portion of the entire docking system, the overall goal was to create a complete, integrated system that worked well together. NASA’s guidance and direction for the study included a number of requirements and goals, listed below:


 * The Soft Capture System (SCS) shall be compatible with a passive or active Androgynous Peripheral Attachment System (APAS) style SCS
 * Hard mate assembly/hard capture system shall be per the International Docking System Standard IDSS Interface Definition Document (IDSS IDD)
 * Use of Technology Readiness Level 6 or higher technologies is required
 * Design, development, qualification and certification of a final design is required to be completed by June 2015
 * The design shall contain no proprietary features
 * Loads are as documented in IDSS Interface IDD Revision A
 * The design shall be as simple and robust as possible
 * The design shall allow build-to-print capability by third parties (must use publically available process and data)

The SIMAC design was originally conceived in 2003 for the Orbital Space Plane (OSP) Program. --Craigboy (talk) 22:28, 27 September 2014 (UTC)

"One of the features of the NASA Docking System that makes it unique is the ability to capture an oncoming vehicle at much lower force levels than previous docking mechanisms. Previous docking mechanism designs, including the APDS and Probe and Cone-type mechanisms require greater initial velocities to achieve soft capture. This has the effect of imparting large dynamic loads into the structure. These loads size the interface structure and appendages such as solar arrays or radiators. A docking mechanism that does not require large forces to achieve soft capture can reduce the structural weight of the entire spacecraft. Since future missions beyond Low Earth Orbit will be severely mass constrained, advances in mating system technology can provide benefits across the entire spacecraft system." --Craigboy (talk) 22:07, 30 October 2015 (UTC)

IDBM
Editor's note:IDBM ≠ NDS but there are many similarities, for example they are both meant to comply with IDSS.

http://www.esa.int/Our_Activities/Human_Spaceflight/One_docking_ring_to_rule_them_all

http://spaceref.biz/company/qinetiq-space-wins-esa-contract-for-international-berthing-docking-mechanism.html

--Craigboy (talk) 09:37, 21 July 2014 (UTC)


 * ESA system is International Berthing Docking Mechanism (or International Berthing and Docking Mechanism) - IBDM not IDBM. It doesn't have it's own article on Wikipedia - at least: not yet. That's the system that Dream Chaser will be using. I recall some info that ESA was suppose to make it compatible with IDSS, but I don't know how did it end up. SkywalkerPL (talk) 17:33, 29 August 2014 (UTC)
 * "The IBDM is designed according to the International Docking System Standard (IDSS) and is hence compatible with the future ISS International Docking Adapter (IDA) on the US side of the ISS."--Craigboy (talk) 22:18, 7 December 2014 (UTC)
 * http://spacenews.com/europe-to-invest-in-sierra-nevadas-dream-chaser-cargo-vehicle/--Craigboy (talk) 21:40, 1 February 2016 (UTC)

Another rename?
"the International Docking System (IDS), formerly known as the NASA Docking System (NDS)"

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20160000702.pdf

Two sources are listed, one doesn't mention the rename and access to the other is limited by export control laws.--Craigboy (talk) 02:15, 15 January 2016 (UTC)

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External links modified (January 2018)
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A couple of suggestions:
"The NDS docking mechanism is androgynous, the first system to use low impact technology and the first system to allow both docking and berthing" APAS 95 was capable of docking a berthing. The first iss module Zarya used it and was berthed to a PMA attached to unity. Future shuttle missions docked to the station. Also one could say that all APAS variants also utilised "low impact technology".

Also referred to in this article is the androgynous nature of the NDS. Block 1 implementation of the IDSS by nasa features active and passive variants, however its not clear weather the active version of the NDS can act as a passive variant. This is due to the apparent lack of mechanical latch strikers. More info can be found here: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20150014481.pdf

Block 2 implementation will be used on Orion and the gateway and should be androgynous. more info can be found in the Human Landing System (HLS) Ascent Element (AE) Lunar Crew Module (LCM) Technology Opportunities document as well as in DSG-SPEC-MECH-017.

KahootChampion (talk) 11:26, 7 June 2020 (UTC)