Keyword: Mechanics

Mechanical & Fluid Systems

Briefs: Mechanical & Fluid Systems
Locomotion of Amorphous Surface Robots

The proposed techniques rely on three principal concepts: (1) controlling the polarity of electromagnets, (2) circulating fluid through a compartmentalized bladder, and (3) expanding and deflating polymers. These designs would allow amorphous robots to move across a surface without conventional wheels or...

Briefs: Mechanical & Fluid Systems
Fluid Disconnect Cooling Technique

The purpose of this innovation is to simulate the space temperature environment onto a fluid disconnect. This environment is to be maintained for a long period of time (48 hours) at a controlled temperature [6 ±2 °F(≈–14.4 ±1.1 °C)] to determine if temperature is causing leakage through the...

Briefs: Mechanical & Fluid Systems

Equipment for space exploration is almost impossible to test on Earth. Testing is expensive and cannot replicate the conditions of launch, cruise, landing, and travel across a planetary surface....

Briefs: Software

The use of composites is rapidly growing across many industries, fostering the need for new design, analysis, and optimization technologies. Every industry feels increasing pressure to launch breakthrough...

Briefs: Mechanical & Fluid Systems
Development of an Analytical Parameterized Linear Lateral Dynamic Model for an Aerobot Airship

Saturn’s moon Titan is of high interest for in situ study due to its many intriguing features. This moon has a dense atmosphere; rough, icy terrain; and low surface winds that make it the ideal place to send a controlled aerial robotic platform, such...

Briefs: Mechanical & Fluid Systems
Algorithm Enhancements to Powered Descent Guidance Software

The Powered Descent Guidance (PDG) software provides a computationally efficient guidance algorithm for powered descent that ensures satisfaction of the governing dynamics, along with adherence to physical control and state constraints, such as avoid the surface, limit thrust magnitude...

Briefs: Software

Aerodynamic control surfaces, with excessive free-play, can cause limit cycle oscillations (LCO), a sustained vibration of constant amplitude. The LCO is caused by a...

Briefs: Mechanical & Fluid Systems
Design Environment for Multi-Fidelity and Multi-Disciplinary Components

Many of the most challenging aspects of propulsion system development are related to the prediction of interacting effects among fluid loads, thermal loads, and structural deflection. A typical design practice might ignore the interaction between the physical phenomena where...

Briefs: Software
Shipping Foam Designer Software

An easy-to-use design tool was developed in response to a large number of documented cases of critical (flight and ground) hardware failing after experiencing drops during commercial shipment. By entering the mass of the hardware to be protected, and the drop height, the software helps the user select the type and...

Briefs: Mechanical & Fluid Systems
Evolutionary Mission Trajectory Generator

The Evolutionary Mission Trajectory Generator (EMTG) is a global trajectory optimization tool for designing interplanetary missions that perform multiple flybys and either low-thrust or high-thrust propulsive maneuvers on the way to destinations in the solar system. Some targets, such as Mars and Venus,...

Briefs: Mechanical & Fluid Systems
Visual International Space Station Configuration Viewing Tool

Communicating the current International Space Station (ISS) configuration and also potential ISS configurations is a necessity during ISS trade studies and Ops Con development. Often, multiple configuration options will need to be communicated. Doing so without a means of displaying...

Briefs: Software

Predicting turbulent flowfield and pressure drop in complex internal flows, such as valves, pumps, and turbines, is of great interest in many areas of...

Briefs: Mechanical & Fluid Systems
Swan Seal

This seal features dual sealing capabilities: a face seal and an axial seal. The name swan seal is derived from its cross section, which resembles a swan. Most injector designs require fuel to be delivered from an inlet fitting, through a feed arm, to the injector tip. Temperature variation from the inlet to the tip, from the cool fuel...

Briefs: Mechanical & Fluid Systems

The extreme conditions on Venus (460 °C and 92 atm) prevent the use of any of the existing science instruments outside of the lander. To transfer a sample into the lander, a...

Briefs: Mechanical & Fluid Systems
A Field-Reconfigurable Manipulator for Rovers

Robotic technologies will be deeply involved in any future human mission to the Moon. Prior to human arrival, robots will survey and explore the lunar surface, establish infrastructure, and assemble and test habitat modules. Once humans have arrived, the robots must be able to assist human...

Briefs: Mechanical & Fluid Systems
Lightweight, Flexible, Freezable Heat Pump/Radiator for EVA Suits

For space exploration missions that may require extended stays and extensive extra-vehicular activity (EVA) operations, the temperature control system must be lightweight, rugged, non-venting, and repairable in space.

Briefs: Mechanical & Fluid Systems

Typical lighter-than-air vehicles utilizing a superpressure design such as balloons, aerostats, or blimps, have one or more fittings attached to the gas containment skin that can serve as load attachment...

Briefs: Mechanical & Fluid Systems
Compact Regenerative Blower

The regenerative blower provides air flow through structures or systems that have relatively high flow resistance. Specifically, the regenerative blower was designed to provide a flow of ventilation gas through a spacesuit and its portable life support system (PLSS). Since the ventilation gas is primarily oxygen, fire...

Briefs: Mechanical & Fluid Systems

Most NASA missions require the use of a launch lock for securing moving components during the launch or securing the payload before release. A launch lock is used to prevent unwanted motion and secure the...

Briefs: Mechanical & Fluid Systems

Mobility for small, man-portable reconnaissance robots in the past has been limited with regard to obstacles like curbs, stairs, and vertical walls. A previous innovation overcame these obstacles by introducing...

Briefs: Mechanical & Fluid Systems

A piezoelectrically actuated percussive bit augments rotary drills to form a rotary-hammering drill/sampler. The Percussive Augmenter of Rotary Drills (PARoD) bit...

Briefs: Mechanical & Fluid Systems
Non-Collinear Valve Actuator

Typical large aerospace valves use pneumatic actuators with large return springs to define a normal state. These springs are exclusively in line with the pneumatic actuator, and therefore are forced to have the same stroke and forces. These typical systems use either a large helical spring or a stack of Bellville...

Briefs: Mechanical & Fluid Systems

The device and method are used to quantify end-to-end latency of head- or helmet-mounted display with head tracking systems in a laboratory or in situ. All commercial or custom head-mounted...

Briefs: Mechanical & Fluid Systems
Workspace-Safe Operation of a Force- or Impedance-Controlled Robot

Precise motion control of a robot by controlling its various robotic manipulators may be organized by the required level of task specification. The levels include object-level control, which describes the ability to control the behavior of an object held in a single or a...

Briefs: Mechanical & Fluid Systems
Cryogenic Mixing Pump with No Moving Parts

Refueling spacecraft in space offers tremendous benefits for increased payload capacity and reduced launch cost, but the problem of thermal stratification in long-term storage tanks presents a key challenge. To meet this challenge, a reliable, compact, lightweight, and efficient cryogenic mixing pump...

Briefs: Mechanical & Fluid Systems
Seal Design Feature for Redundancy Verification

NASA has requirements for redundant seals to protect human-occupied cabin atmospheres, as well as fluid and gas systems in space vehicles exposed to the harsh environments. Comparable requirements have been passed down to the International Space Station (ISS) Program, and are now levied on the...

Briefs: Mechanical & Fluid Systems
Dexterous Humanoid Robot

A humanoid robot has been created that includes a torso, a pair of arms, a neck, and a head. The torso extends along a primary axis and presents a pair of shoulders. The pair of arms movably extends from the shoulders. Each of the arms is fully jointed. The neck movably extends from the torso along the primary axis, and...

Briefs: Mechanical & Fluid Systems
Tethered Vehicle Control and Tracking System

This innovation can control the flight of a tethered vehicle, in an airborne wind energy (AWE) generation system, through the use of a pan-tilt platform and a visible spectrum digital camera, combined with tracking and control software running on a standard PC.

Briefs: Mechanical & Fluid Systems

Sampling, sample handling, and sample transfer to lander platforms of in situ exploration missions involve great technical challenges. These challenges are even harder to address when the...