VISIMO
Autonomous spacecraft R&D

NASA GRAMS: Advancing Autonomous Spacecraft Systems

GRAMS is a modular cognitive architecture for autonomous spacecraft failure detection, mitigation, and response, developed by VISIMO through a successful NASA SBIR Phase I effort.

Case study

The relevant public case-study content is organized here for readability and technical review.

Executive summary

NASA's Graceful Architecture for Mitigation of System Failures project addresses long-duration mission risk by combining machine learning, digital twin simulation, and autonomous decision support. Phase I validated the feasibility of detecting and responding to spacecraft failures in real time.

Challenge

Deep-space missions cannot rely on immediate Earth-based intervention. Communications delays, hardware failures, radiation exposure, micrometeoroid impacts, and cascading faults can make real-time autonomous response essential.

  • Communication delays can make Earth-based troubleshooting impractical.
  • Traditional failure trees do not cover novel or unexpected anomalies.
  • Redundant hardware increases mission weight and cost.

Problem requirements

Autonomous spacecraft systems need to detect anomalies, model likely failure paths, recommend corrective action, and adapt across mission profiles without depending on constant ground control.

Solution

GRAMS uses a modular cognitive architecture that combines anomaly detection, alert routing, failure simulation, digital twin modeling, and recommended corrective action.

  • Risk Identification Algorithm to detect and classify anomalies.
  • Alert Generator to prioritize alerts and reduce cognitive burden.
  • Failure Simulator to create synthetic training and evaluation scenarios.
  • Digital Twin to model spacecraft behavior under failure conditions.
  • Action Recommender to suggest corrective mitigation steps.

Implementation

The system was tested in simulated ISS-relevant environments with scenarios such as pressure leaks, sensor malfunctions, and pump failures. VISIMO deployed GRAMS on Hewlett Packard Enterprise's Spaceborne Computer-2 Test and Development System to validate compatibility with space-grade computing constraints.

Results

The Phase I effort exceeded anomaly-detection benchmarks, validated digital twin modeling against complex failure scenarios, and positioned GRAMS for further validation in an ISS testing pathway.

Applications

Where the work can be applied or adapted.

NASA missions

Support autonomous anomaly detection and mitigation for deep-space crewed missions, lunar missions, Mars missions, and robotic probes.

Commercial space

Improve resilience and operational continuity for low Earth orbit platforms, space stations, and satellite operations.

Terrestrial high-risk systems

Adapt the architecture to unmanned aerial systems, nuclear facilities, chemical plants, and other complex systems where failure management matters.

Conclusion

Transition path

GRAMS demonstrates a path toward resilient autonomous operations by pairing failure detection with simulation, recommendation, and modular integration.

Next step

Turn a mission question into a testable prototype.

VISIMO works with federal stakeholders, primes, research institutions, and technical collaborators on focused AI R&D efforts where software, data, and model evaluation can create practical mission value.

Decision support
AI assurance
Adaptive testing
Geospatial risk
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