1 / 8

Contact Information: MSFC Avionics Department Flight Software Group (ED14) 256-544-5115

Learn about the V&V initiative for COTS RTOS used in critical space applications, ensuring reliability and safety standards. Explore test plans, procedures, and certifications required. Stay updated with RTOS developments.

tkyle
Download Presentation

Contact Information: MSFC Avionics Department Flight Software Group (ED14) 256-544-5115

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. V&V of COTS RTOS for Space Flight ProjectsThe 1st Annual NASA Office of Safety and Mission Assurance (OSMA) Software Assurance Symposium (SAS)Michael RahmatipourMSFC Contact Information: MSFC Avionics Department Flight Software Group (ED14) 256-544-5115 Michael.H.Rahmatipour@msfc.nasa.gov

  2. Goal of V&V of COTS RTOS Center Initiative • The main goal is to perform V&V of the RTOSs used in critical flight applications in the following steps: • Evaluate the amount of software testing performed by vendors of CTOS RTOS. • Develop a set of generic test requirements for embedded flight real-time operating systems. • Develop a test plan and approach to perform V&V on a candidate operating systems against the above generic requirements. • Develop test software and test procedures to implement the verification plan.

  3. Purpose of the V&V of COTS RTOS Center Initiative • Multiple, space-related programs currently use commercial off-the-shelf (COTS) real-time operating systems (RTOSs) as part of the NASA goal to reduce software development time and cost. • Recent, high-profile NASA mission failures have underscored the need for highly reliable software. • An internal NASA audit showed a need for verification and validation (V&V)/certification tests of the COTS RTOSs used. • These operating systems should be tested to the same confidence level as flight critical software applications.

  4. Current Embedded OS Usage EE Times conducted a series of surveys over the years on the operating systems used by its readers.

  5. V&V of COTS RTOS Center Initiative Products and Status • Completed deliverables • White paper on current practices for vendor V&V of commercial operating systems. • Software Requirements Specification for a Reusable Realtime Operating System for Embedded Systems. • Software Requirements Specification for the VxWorks RTOS for Embedded Systems. • Plan and Approach for V&V of the VxWorks Realtime Operating System. • Plan for Verification of the VxWorks Realtime Operating System.

  6. V&V of COTS RTOS Center Initiative Products and Status • Products in development • VxWorks RTOSTest procedures and test reports • MSFC is developing the test software and procedures to verify the Software Requirements Specification for the VxWorks RTOS for Embedded Systems • There are 157 requirements that are organized in 28 cases. • Final Software Requirements Specification for the VxWorks RTOS for Embedded Systems

  7. V&V of COTS RTOS Center Initiative Test Case Status

  8. V&V of COTS RTOS Center Initiative Summary • There are many good packages available as real-time kernels. • The level of effort required by end users to verify/validate or certify a RTOS is highly dependent on the processor board, contents of the software executable, development and source code documentation (including requirements), and tools available for verification. • Any V&V/certification effort will be valid for the tested configuration only. Any update to the processor board, peripherals, RTOS, etc. will necessitate a re-verification. • An important consideration in choosing a COTS RTOS for a safety critical application is the degree of support the vendor will provide for a verification effort.

More Related