Technical ASR DRFP Questions and Answers.pdf
PDF 80 KB Posted
- Attached to
- Advanced Spacesuit Regulator Federal contract opportunity
- Solicitation number
- 80JSC025ASREGTL
About this file
This document is a Questions and Answers (Q&A) file for the Advanced Spacesuit Regulator (ASR) solicitation, numbered 80JSC025ASREG. The document contains six technical questions and NASA's corresponding responses related to specific technical requirements for the spacesuit regulator. Key technical details include clarifications about outlet sense methodologies, pressure transducer drift specifications, position sensor requirements, motor controller limits, and sensor technology. NASA provides flexible responses, indicating openness to alternative approaches while maintaining core technical requirements. The responses address specifics such as acceptable outlet sense methods, sensor drift tolerances, position sensing technologies, motor voltage and power constraints, and the expectation of discrete output conditions for the regulator's performance.
View the file
Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| ATTACHMENT L-7 - Technical Library Request Form.pdf |
On GovTribe
Work with this file on GovTribe
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
Question # Page # Subject/Section RFP Language Question/Comment NASA Response
CTSD-ADV-2241, p.
3.1 (piston-based outlet sense)
Is the first stage required to use a piston for outlet sense or can alternate methodolgies (bellows, diaphragm, etc.)
be considered?
Alternate methods may be considered
CTSD-ADV-2241, p.
3.3.3.1.2, 3.3.3.1.3
The pressure transducer drift shall not exceed .05% in the calibration period.
0.05% drift sensor drift over 6 years is unrealistic, recommend increasing %drift per year
The RFP language will be revised from 'shall' to 'should' to indicate that NASA is open to considering sensing solutions that may exhibit higher drift over their calibrated lifespan.
CTSD-ADV-2241, p.
3.3.4
The ASR shall include a position sensor capable of reporting spring compression/location to an accuracy of ±1% of stroke.
Does NASA have a desired position sensing technology or sensor output for the existing controller?
Historically, NASA has used linear potentiometers, but we are not trying to push a specific technology at this time.
The intent of the sensor is to offer a way to verify second stage regulator setting, not provide feedback control.
4 CTSD-ADV-2241
Is discrete output condition relative to motor stepper count expected? That is, is it expected that the regulator move to a setpoint and provide regulated pressure within the tolerance without feedback/adjustment? Or can the regulator be responsive (via feedback control of the actuator) to inlet pressure and temperature conditions to ensure that the tight regulation band can be maintained?
Discrete output condition relative to motor stepper count is expected. When the regulator is commanded to a set point, the controller (separate from this contract) commands the motor to a step count based on a lookup table.
5 CTSD-ADV-2241
Do you have a recommended/current supplier of pressure sensors intended for this application?
NASA can share the vendor and part number information for the sensors we've used so far, but NASA IS NOT requiring their use. NASA encourages your company to illustrate how this corresponds with our requirements.
6 CTSD-ADV-2241
are there any related motor controller limits (assuming there is an existing/planned 2-phase controller). Mainly, can it provide something other than 5 V or not? What's the max current it can support?
The motor can be up to 28V, but power consumption cannot exceed 5.8W
Advanced Spacesuit Regulator (ASR), Solicitation Number: 80JSC025ASREG - DRFP QUESTIONS & ANSWERS
File details come from the government source that posted it. Updated .