Supplier: IHS ESDU
Description: The purpose of this Item is to promote 'good practice' when choosing and fitting a function with a linear Least Squares error profile to represent a set of data. There are a host of spreadsheets, mathematical calculation software and dedicated plotting packages that enable the automatic fitting of a
Supplier: ASTM International
Description: Generalized Linear Least-Squares Adjustment, Revisited Volume 3, Issue 7 (July 2006) TSURFER, a generalized linear least-squares (GLLS) code, is a new module of the SCALE system. After a short introduction outlining the history and applications of the GLLS methodology in reactor physics, a new
Standards and Technical Documents - API PUBL 4376 -- DEVELOPMENT OF IMPROVED DISPERSION ESTIMATES IN TRACER EXPERIMENTSSupplier: American Petroleum Institute (API)
Description: INTRODUCTION Background Since the passage of the Clean Air Act, the Environmental Protection Agency (EPA) has used numerous air quality models that relate source emissions and meteorological data to the expected air quality. The EPA has relied upon the predictive capability of air quality models to
Standards and Technical Documents - Ultrasonic Measurement of Stress in Titanium Alloys - 47th IIS 2001
Description: This paper presents results from the application of a two-point-defocus ultrasonic technique that was developed to measure Rayleigh surface wave (RSW) and surface skimming longitudinal wave (SSLW)velocities much more rapidly than the traditional V(z) curve analysis technique. It also presents in
Supplier: Decagon Devices, Inc.
Description: Portable, Durable, 3 Interchangeable Sensors The KD2 Pro uses 3 interchangeable sensors to measure thermal diffusivity, specific heat (heat capacity), thermal conductivity and thermal resistivity. After taking a measurement, the KD2 Pro automatically converts data into thermal properties values.
- Thermal Analyzer Type: Thermal Conductivity Analyzer
- Temperature Range: -58 to 302 F
- Response Time: 1 minutes
- Local Interface: Digital Front Panel
Supplier: Macro Sensors
Description: Macro Sensors' PR 750 Series of 3/4 inch (19 mm) diameter AC-Operated LVDTs are general purpose contactless linear position sensors for both OEM applications and end user requirements. They are available in full scale measuring ranges from ±0.050 inch (±1.25 mm) to ±10 inches (±250 mm) and offer a
- Linearity: 0.2500 ±% Full Scale
- Operating Temperature: -65 to 220 F
- LVDT Type: Current Balance AC-AC
- Output: Voltage
Linear Solenoids - Solenoid; T; 795; 3 W; 6 VDC; 11.52 Ohms; 0.025in. Square Pin Terminals -- 70162401Supplier: Allied Electronics, Inc.
Description: Solenoid, Coil Resistance 11.52 Ohms, Power Rating 3 W, 0.025in. Square Pin Terminals Coil Termination Dormeyer® Linear Open Frame Series The open frame solenoid is the simplest solenoid device consisting of an open iron frame, an overmolded or taped coil, and a movable plunger in the center of
- Maximum Stroke: 1.27 mm
- Action: Pull
- DC Power Input Options: 6VDC
- Power Rating (DC watts or AC VA): 3 DC watts or AC VA
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Multiscale methods for gore curvature calculations from FSI modeling of spacecraft parachutes
We show how the methods work for the fully-open and two reefed stages of the Orion spacecraft main and drogue parachutes .
FSI modeling of the reefed stages and disreefing of the Orion spacecraft parachutes
Abstract Orion spacecraft main and drogue parachutes are used in multiple stages, starting with a “reefed” stage where a cable along the parachute skirt constrains the diameter to be less than the diameter in the subsequent stage.
One tumble was noted prior to the ejection of the escape system, but following separation the spacecraft continued to tumble until the drogue parachute deployed.
Although the drogue parachutes failed to deploy properly, one camera was able to be recovered from the Atlantic to provide visual proof of the clean separation.
Journal of Spacecraft and Rockets > Feasibility of Recovering a One-Million-Pound Booster (Deceleration System)
The all-parachute recovery system considered for analysis purposes is essentially identical to the SRB recovery system in that it uses a single drogue parachute and a cluster of three main parachutes for all applications.
Many on the navigation team had experienced the initial disappointment of the drogue parachute deployment failure on Genesis, which obscured the outstanding effort and result achieved by the navigation strategies implemented on that mission.
Escaping the Bonds of Earth
the pad ± had not pulled the Mercury capsule clear of the Redstone and, as the shocked flight controllers watched, the drogue parachute popped out of its nose, followed by the main canopy and lastly, accompanied by a green cloud of marker …
Aerodynamic Decelerator Systems Technology Conferences > Testing Small CPAS Parachutes Using HIVAS (AIAA 2013-1309)
In addition, an Air Force Subscale Aerial Target (AFSAT) Drogue parachute was tested as a control because it has known performance.6 All three parachutes were manufactured by Airborne Systems North America.
Aerodynamic Decelerator Systems Technology Conferences > A Boilerplate Capsule Test Technique for the Orion Parachute Test Program (AIAA 2013-1290)
CPAS includes a pair of mortar-deployed drogue parachutes intended to decelerate and stabilize the capsule prior to deployment of the main parachute system.
Aerodynamic Decelerator Systems Technology Conferences > Aerodynamic Reconstruction Applied to Parachute Test Vehicle Flight Data Analysis (AIAA 2013-1259)
The longer periods of flight under the Drogue parachutes are reconstructed using a multibody Flight Analysis and Simulation Tool (FAST).