Briefs: Mechanical & Fluid Systems
Wallops Flight Facility 6U Advanced CubeSat Ejector (ACE)
Six-unit (6U) CubeSats are recognized as the next nanosatellite to be considered for standardization. The CubeSat standard established by California Polytechnic University (Cal Poly), which applies to 1U–3U sizes, has proven to be a valuable asset to the community. It has both provided...
Briefs: Mechanical & Fluid Systems
Improved Attachment Design for Ceramic Turbine Blades Via Hybrid Concepts
This innovation is a hybrid metal-ceramic matrix composite (CMC) turbine blade in which a SiC/SiC CMC airfoil section is bonded to a single-crystal superalloy root section in order to mitigate risks associated with an all-CMC blade inserted in a superalloy disk. This will...
Briefs: Mechanical & Fluid Systems
This work involved designing a liquid nitrogen cold-plate heat exchanger with a high thermal mass using code-standard, high-pressure tubing. High thermal mass requires a substantial amount of...
Briefs: Aerospace
Sea-Level Flight Demonstration Altitude Characterization of a LO2/LCH4-Based Ascent Propulsion Lander
A recently developed 1,500-lbf (6,672-N) thrust-class liquid oxygen/liquid methane (LO2/LCH4) rocket engine was tested at both sea level and simulated altitude conditions. Sea-level tests were conducted using both a static...
Briefs: Mechanical & Fluid Systems
Diminutive Assembly for Nanosatellite deploYables (DANY) Miniature Release Mechanism
CubeSat appendices such as solar panels and antennas often need to be constrained by a release mechanism during launch. These appendices are then deployed once the desired orbit is reached. The usual constraint method used is a combination of an unpredictable/...
Briefs: Mechanical & Fluid Systems
Quantitative Real-Time Flow Visualization Technique
There is a need for experimental techniques that have low cost and rapid turnaround. It is also necessary to obtain quantitative information from such a method. Previous methods are either lacking in quantitative information such as dye or smoke injection, or require considerable set-up and...
Briefs: Mechanical & Fluid Systems
MEMS Micro-Translation Stage with Large Linear Travel Capability
A MEMS (microelectromechanical systems) micro-translation stage (MTS) with large linear travel capability was developed that uses capacitive electrostatic forces created by stators arranged linearly on both sides of a channel, and matching rotors on a moveable shuttle for precise...
Briefs: Mechanical & Fluid Systems
A valve cage consists of a stackable planar structure design with paths that are azimuthally cut out and connected radially. The pattern causes the flow to move...
Briefs: Mechanical & Fluid Systems
Thin-Film Evaporative Cooling for Side-Pumped Lasers
A highly efficient way to cool solid-state crystal lasers was developed. This thin-film evaporative cooling technique offers higher optical efficiencies and monochromatic quality than traditional conductive cooling techniques. Developed for use in side-pumped 2.0- micron laser systems used in...
Briefs: Mechanical & Fluid Systems
MEMS Gyroscope with Dual Interferometric Sense Elements
High-performance inertial sensors, such as ring laser gyroscopes or fiber optic gyroscopes, have sufficient performance to enable “dead reckoning” navigation for adequate periods of time. Smaller microelectromechanical system (MEMS) inertial sensors, such as MEMS gyroscopes and MEMS...
Briefs: Aerospace
ACS Anchor Guide Stud and Caddy
An alignment guide and a mounting interface for two of the repair tools on orbit during the Hubble Space Telescope Servicing Mission 4 (see SM4) were developed. This design can be installed in a timely manner, and was specifically developed for a worksite with minimal access and minimal visual line-of-sight to the...
Briefs: Aerospace
Next-Generation, Lightweight Hard Upper Torso/Hatch Assembly
The current MK-III carbon-graphite/epoxy Hard Upper Torso (HUT)/hatch assembly represented an 8.3 psi (≈57 kPa) technology demonstrator model of a zero pre-breathe suit. In this configuration, the MK-III suit weighed about 120 lb (≈54 kg). Since future lunar/planetary suits will...
Briefs: Aerospace
Elastic Deployable Composite Tubular Roll-Out Boom
The objective of this work was to develop an innovative deployable boom/structure technology that is ultra-lightweight (<30-grams/meter potential), and has extremely compact stowage volume (>100:1 compaction ratio), broad scalability (no size limits envisioned), high deployed frequency,...
Briefs: Mechanical & Fluid Systems
Reduced-Speed Duplex-Ring Seal
Ring seals are used in rotating union applications where a fluid flow or hydraulic pressure signal is transferred from a static reference frame to a rotating component, such as a shaft, for the purpose of providing lubrication and/or a hydraulic signal to a component(s) in a rotating frame of reference. Ring seals...
Briefs: Aerospace
Performing Launch Depressurization Test on Large Test Articles Using Two Vacuum Chambers in Tandem
Two vacuum chambers were used in tandem to perform a launch depressurization test. The test article was mounted in a 10-ft (≈3 m) Vertical Vacuum Chamber (Chamber 248-10). The 25-ft (≈7.6-m) Space Simulator (Chamber 150-25) was rough-pumped and...
Briefs: Mechanical & Fluid Systems
Pyramid Micro-Electrofluidic-Spray Propulsion Thruster with Integrated Attitude and Thrust Vector Control
A micro-electrofluidic-spray propulsion (MEP) system was built on a micro scale, in which arrays of hundreds of nano-thrusters are etched on silicon wafers like ICs, only a centimeter on a side. Many dozens of these thruster chips can be...
Briefs: Robotics, Automation & Control
Sample return missions have the ability to vastly increase scientific understanding of the origin, history, current status, and resource potential of solar system objects including...
Briefs: Motion Control
Conventional piezoelectric materials, such as PZTs, have reasonably high electromechanical coupling over 70%, and excellent performance at room temperature. However, their coupling factor...
Briefs: Energy
This work describes a discontinuous or segmented mirror whose overall flatness is less dependent on the limited tension that can be supplied by the booms. A solar sail is a large, nominally...
Briefs: Motion Control
A sampling device and a deployment method were developed that allow collection of a predefined sample volume from up to a predefined depth, precise sampling site selection, and...
Briefs: Mechanical & Fluid Systems
Nozzle Heat Flux Gauge
This innovation is a tungsten-rhenium gauge that can be placed into an aft exit cone of a rocket motor. It will measure heat flux with time for the full duration of the RSRM (reusable solid rocket motor) nozzle environment with equal response time.
Briefs: Mechanical & Fluid Systems
NASA is developing technologies to enable in situ analysis and sample acquisition from planetary bodies. Missions to these diverse locations require autonomous, highly customizable, reliable tools....
Briefs: Robotics, Automation & Control
Evaluation of Rail Gun Technology for Launch Assist of Air-Breathing Rockets
A prototype horizontal electromagnetic rail launcher has been demonstrated along with a corresponding theory. This system builds out of published work in augmented rail guns, but modifies this technology so that the motor can operate for seconds rather than...
Briefs: Propulsion
Using Harmonics to Control Flutter in Wings with Electrical Motors
As aeronautics engineers develop innovative distributed electric propulsion systems, they face new challenges in ensuring that these innovative aircraft are safe as well as fuel efficient. In particular, these systems involve a large number of electrically driven fan motors...
Briefs: Robotics, Automation & Control
Micropulse Detonation Rocket Engine for Nano-Satellite Propulsion
An efficient propulsion system would use a micropulse detonation rocket engine (–PDRE) for nano-satellite maneuverability in space. Technical objectives are to design, build, and conduct a small detonation tube experiment in order to explore the feasibility of using –PDRE for...
Briefs: Propulsion
Experimental Testbed for 1-MW Turboelectric Distributed Propulsion Aircraft
Researchers at NASA’s Armstrong Flight Research Center are developing a concept aircraft for testing turbo-electric distributed propulsion (TeDP) experiments. TeDP generally involves providing thrust to an aircraft via wing-mounted ducted electric fans, which consist...
Briefs: Motion Control
Complex pressure systems are utilized during testing in the propulsion branch as well as during the propellant loading stage of a mission. Keeping track of the state of such a system becomes more...
Briefs: Sensors/Data Acquisition
In this innovation, a team successfully developed and implemented a combined convective and conductive cooling system that permits rapid cooling....
Briefs: Motion Control
Spaceborne gimbal systems are typically bulky with large footprints. Such a gimbal system may consist of a forked elevation stage rotating on top of the azimuth motor, and occupy a large...
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