Mechanical & Fluid Systems

Briefs: Mechanical & Fluid Systems
Carbon Nanotube Purification

Development of carbon nanotubes (CNTs), including single-wall and multi-wall nanotubes and nanofibers, into useful devices requires fabrication of CNTs that are relatively free from process residues such as amorphous...

White Papers: Aerospace
Metal Stamping Design Guidelines

Metal Stamping provides an economical way to produce quantities of parts that can possess many qualities, including strength, durability, wear resistance, good conductive properties, and stability. In this paper,...

Briefs: Mechanical & Fluid Systems
Deployable Perimeter Truss with Blade Reel Deployment Mechanism

Solar sail technology depends heavily on the total surface area of the sail. In other words, minimizing mass and volume of its support structure is the main objective, particularly...

Briefs: Mechanical & Fluid Systems
NEO Hunter Seeker Micro-Spacecraft and Mission Concept

The area of research known as “Planetary Defense” is largely concerned with identifying and tracking asteroids that could impact Earth. The vast majority of asteroids that pose such a risk...

Briefs: Mechanical & Fluid Systems
Multipath, Multistage, Erosion-Resistive Valve for Downhole Flow Control

Multipath, multistage, erosion-resistant flow control valves have been developed that can sustain the extremely high pressure of deep oil wells. Fitting in the restricted...

Briefs: Mechanical & Fluid Systems
Passive Close-Off Feature for Sample Acquisition and Retention

The current coring bit and percussive drilling style works very well for strong rocks; however, when coring into weak, crumbling rock, the core tends to break apart and simply fall out...

Briefs: Mechanical & Fluid Systems
Piezoelectric-Actuated Cryogenic Thermodynamic Vent Valve

Cryogenic fluid control valves require actuation that controls the geometric position of the orifice in a thermally stable manner. Traditional actuator devices may have various materials...

Briefs: Mechanical & Fluid Systems
Decelerator System Simulation (DSS)

The Crew Exploration Vehicle Parachute Assembly System (CPAS) project conducts computer simulations to verify that requirements on flight performance, parachute loads, and terminal rate of descent are met. The...

Briefs: Mechanical & Fluid Systems
Miniature, Multi-Functional, Self-Braking Vehicle

A novel, miniature, low-mass vehicle has been created that is driven by piezoelectric stacks and a resonance structure. Preliminary tests on similar mechanisms that are used to transmit electrical...

Briefs: Mechanical & Fluid Systems
Pulse-Echo Probe Mounting Fixture for Blind Alignment on Pipes

The probe and its mounting fixture are critical parts of the health monitoring of steam pipes. A high-temperature, piezoelectric transducer generates and receives ultrasonic waves, and...

Briefs: Mechanical & Fluid Systems
Passive Mechanism for Maintaining Tension at a Spool to Within a Given Window

During any winding or unwinding action, a tether may experience unexpected changes in tension. For example, the load being wound could become stuck and stop moving,...

Briefs: Mechanical & Fluid Systems
Aluminum Gas Tungsten Arc Orbital Tube Welding

JPL has been hand-welding aluminum tubing for decades in support of flight programs and ground support equipment, including thermal plates and shrouds. This hand-welding process is time-consuming,...

Briefs: Mechanical & Fluid Systems
Effective Packing of Large Panels via Scrolling and Origami Folding

There is a need for large mirrors that can be launched to various bodies in the solar system in a packed form and unfolded to provide the required dimensions. The solution to the...

Briefs: Mechanical & Fluid Systems
Six-Degree-of-Freedom Control With Only Eight Thrusters

Typical spacecraft thruster configurations are often unable to provide full six-degree-of-freedom control and may have unwanted interaction between their attitude control and trajectory...

Briefs: Mechanical & Fluid Systems
Precise Direct Control of Pressure or Vacuum Using a Digitally Controlled Actuator

A closed/semi-open pressure or vacuum system uses an electric screw mechanical actuator that can be digitally controlled and monitored, and which receives feedback...

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