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Integrated System for Autonomous and Adaptive Caretaking (ISAAC)

Completed TRL 6 (started at 3, targeting 6)

Description

Human exploration infrastructure in deep space, such as the planned “Gateway", will be uncrewed for extended periods. During these periods NASA needs autonomous systems that can perform Fault Detection, Isolation, and Recovery (FDIR) as well as perform routine maintenance and logistics operations through high latency communication to ground controllers. The Integrated System for Autonomous and Adaptive Caretaking (ISAAC) project directly addresses this key technical need for the Human Exploration and Operations Mission Directorate (HEOMD) as described below:

“When uncrewed, the Gateway will perform payload ops via a series of robust autonomous capabilities that will reduce risk, maximize closure of knowledge gaps, and prepare for missions beyond the Earth-Moon system. These ops may include performing systems diagnostics & repair, logistics & consumables stowage, exploration capability testing, aggregation of robotically returned destination surface samples, science measurements and ops, communications relay, lunar vicinity mission support, etc." (HEOMD-004 “Exploration Requirements", baseline release, 2018)

To help satisfy NASA's need, the primary goals for the ISAAC project are:

  1. Develop/enhance key technologies for the autonomous operation of complex, space-based infrastructure (e.g., Gateway) that provide the capability to support operations where human intervention is limited.
  2. Provide new capabilities for spacecraft that incorporate both autonomy and robotics to enable a new paradigm for in-space operations and adaptive vehicle caretaking.


ISAAC will develop reusable technology (software reference implementation and validation testing) for integrated autonomous systems in the following areas:

  1. Integrated data: Current state of the art in human spaceflight systems is that data from sensors associated with different spacecraft subsystems (Structures, GN&C, and ECLSS, etc.) remain siloed. ISAAC will unify spacecraft data and models with autonomous robotics, linking data streams from spacecraft subsystems, sensor networks, and robots, as well as linking 3D geometry and sensor data map layers, and detecting changes and anomalies. ISAAC will test autonomous state assessment with a mobile inspection robot, ideally on ISS.
  2. Integrated control interface: Current state of the art manages spacecraft with largely independent interface tools for different subsystems. Interfaces have different heritage, design assumptions and operator interface styles. Subsystem interactions are hard to analyze due to poor connectivity between separate tools. ISAAC will develop an integrated control interface that combines interface tools for spacecraft subsystems and autonomous robots; improves system-level situation awareness, situation understanding, and operator productivity; enables linking and embedding between tools to improve subsystem interaction analysis; and supports the entire activity life cycle from planning through execution and analysis. ISAAC will test logistics management with mobile inspection and mobile manipulation capabilities, and test operator productivity in a logistics management scenario, both ideally on ISS.
  3. Coordinated execution: Current state of the art for executing spacecraft activities that require coordination between subsystems is either manual commanding (operator tracks dependencies between subsystems) or simple sequencing that can be brittle to even minor contingencies during execution. ISAAC will develop coordinated execution technology that models dependencies, uses automated planning to translate a high-level task definition to a plan that can work given the current system state (e.g. include actions to open hatches so that a robot can move where needed), and leverages ISAAC's integrated data technology to watch for execution contingencies and trigger replanning as needed. This technology will reduce the time to effect changes on the system during critical faults and emergencies. ISAAC will test leak detection, isolation, and repair with mobile inspection and mobile manipulation capabilities, ideally on ISS.


Benefits

ISAAC will deliver technologies to enable remote and autonomous caretaking of Gateway during long periods of time when crew are not onboard to perform maintenance, logistics management, and utilization tasks, as well as when Gateway is out of communication with ground controllers. These benefits are also “Mars-forward” in that the same capabilities will be needed for sending human crews farther into deep space.
A specific example is ISAAC's multi-sensor survey technology, demonstrated using the Astrobee ISS free-flyers. Robotic survey of a spacecraft interior can provide improved situation awareness to ground operators during uncrewed mission phases, enabling monitoring for regular maintenance, as well as detection of anomalies that need to be addressed before crew return. Beyond Astrobee's baseline RGB and depth sensors, ISAAC has experimented with incorporating acoustic spatial images from a microphone array, which could be used to localize a leak, and (in ground testing only) thermal imagery, which could be used to detect a fire or overcurrent anomaly. ISS ops personnel are also evaluating using ISAAC's robotic survey technology to periodically cover the ISS interior, producing a panoramic tour imagery product that would complement the long-standing approach of collecting crew safety videos, but would make it far more convenient for users to navigate to their area of interest.


Details

Technology areaRobotic Systems
ProgramGame Changing Development (GCD)
Lead organizationAmes Research Center, Moffett Field, CA
Start date2018-11-01
End date2024-09-30

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