Engineering topics
Publications and source records attributed to Tai, A..
In this paper, we present a performability study that analyzes the guarded operation duration for onboard software upgrading.
Explore the source record for details and available documents.
This paper summarizes work in progress in three different areas: 1) a framework for the design of higly reliable and higly available space avionics systems; 2) distributed reliable computing architecture; and 3) Guarded Software Upgrading (GSU) techniques for software upgrading during long-term missions such as the Pluto/Kuiper missions.
Fault-tolerant systems are traditionally divided into fault containment regions and custom logic is added to ensure the effects of a fault within a containment region would not propagate to the other regions.
In order to accomplish dependable onboard evolution, we develop a methodology which is called guarded software upgrading (GSU).
In this paper, we report our experiences and findings on the design of fault-tolerant bus architecture comprised of two COT buses, the IEEE 1394 and the I***Sup 2***C.
Using COTS products, standards and intellectual properties (IPs) for all the system and component interfaces is a crucial step toward significant reduction of both system cost and development cost, as the COTS interfaces enable other COTS products and IPs to be readily accommodated by the target system architecture.
The evolvable avionics systems such as the X2000 at NASA/JPL are able to have software upgrades during a long-life mission for dependability, performance and functionality improvement.
The high-performance, scalability and miniaturization requirements together with the power, mass and cost constraints mandate the use of commercial-off-the-shelf (COTS) components and standards in the X2000 avionics system architecture for deep-space missions.
With respect to the long-life missions associated with NASA's X2000 Advanced Deep-Space System Development Program, reliability implies a system's continuous operation for many years in an unsurveyed radiation-intense environment.
The long-life deep-space missions associated with NASA's X2000 Advanced Flight Systems Program creates many unprecedented challenges for us.