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Method for Visualization of Analog Signals

The method can be used to identify changes or faults in a system. Ames Research Center, Moffett Field, California In this innovation, a method makes use of a new technique for describing analog information based on the roots of polynomial functions of infinite degree. Monotonic analog signals are transformed into characters that are fused into a two-dimensional composite visualization of the generating signal information. Examples of such signals include those arising from sensors, electronic equipment, or mechanical devices. Traditionally, such information is displayed by indicators, warning lights, or dials that discard the original content and temporal evolution of the source. Hence, they are not invertible back to the original signal for further examination.

Posted in: Electronics & Computers, Software, Briefs

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Time-Multiplexed Pipelined FFT Implementation

Goddard Space Flight Center, Greenbelt, Maryland A fast Fourier transform (FFT) was developed as part of the Soil-Moisture Active/Passive (SMAP) project. The FFT was created on 16-bit data arriving at a rate of 48 MHz to run on a resource-constrained, space-grade field programmable gate array (FPGA).

Posted in: Electronics & Computers, Software, Briefs

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Method for Authorizing Critical Effector Commands in a Space-Based Integrated Modular Avionics System

Lyndon B. Johnson Space Center, Houston, Texas An Integrated Modular Avionics (IMA) architecture provides a common platform for software partitions with shared processing and input/output (I/O) resources. A key feature of the IMA architecture is I/O partitioning. An IMA system will prevent one software partition from changing an I/O resource that is owned by another software partition. This prevents one software partition from controlling the outputs of another due to hardware fault or software error. The IMA system must have protection mechanisms in place to enforce the I/O partitioning.

Posted in: Electronics & Computers, Software, Briefs

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Fully Configurable Interrupt Controller

The controller is used in a method for authorizing critical effector commands in a space-based integrated modular avionics system. Lyndon B. Johnson Space Center, Houston, Texas An interrupt is a signal in an interrupt controller (IC) that pulses to indicate an event or error. The IC is responsible for processing multiple internal interrupts and making these interrupts available to a host computer via a data bus or external output pins. Since there exist numerous interrupts, a method must be developed for routing the interrupts to the external output pins.

Posted in: Electronics & Computers, Software, Briefs

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Using a Multicast File Transfer Protocol to Update the Firmware of Multiple Embedded Devices Simultaneously

This method minimizes the amount of time and network bandwidth required to update the firmware in all smart sensor devices. John F. Kennedy Space Center, Florida Smart sensors for measuring temperature and pressure have been developed as part of the Advanced Ground Systems Maintenance (AGSM) project. The sensors have flash memory for storing firmware, calibration data, and configuration information. In anticipation of the sensors being installed at multiple locations (possibly numbering in the hundreds) around the Kennedy Space Center, a method was devised to update the firmware of many sensors quickly and easily.

Posted in: Electronics & Computers, Software, Briefs

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Model of Radiation Effects on Electronics (MREE)

Marshall Space Flight Center, Alabama An updated software model has been developed for predicting the single-event effect (SEE) rates in circuit designs as they are being designed. This tool will be used for estimating the frequency of the various SEEs, such as logic upsets and circuit latch-up. It may also be used to estimate the total radiation dose effects to microelectronic devices operated in the natural space radiation environment or in ionizing radiation test environments.

Posted in: Electronics & Computers, Software, Briefs

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Development of an Analytical Parameterized Linear Lateral Dynamic Model for an Aerobot Airship

The method relies on the use of aircraft stability derivative methods with the basic geometric and aerodynamic properties of the airship. NASA’s Jet Propulsion Laboratory, Pasadena, California 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 as a conceptual Aerobot Airship. An important feature of a self-propelled, lighter-than-air aerial vehicle is that it must be autonomously controlled to navigate and avoid obstacles because of a 2.6-hour communication delay between the Earth and Titan. Developing a dynamic model that can be tuned will enable robust and reliable control of the Aerobot Airship.

Posted in: Mechanical Components, Software, Briefs

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