Spatiotemporal Robot Reservation System for Collision Avoidance
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Solution Overview
Problem
As the number of autonomous and semi-autonomous robots increases in an environment, the unpredictability of their trajectories due to obstacle avoidance leads to increased entropy and collision likelihood, potentially affecting their ability to perform tasks effectively.
Innovation Solution
The environment is partitioned into spatial regions reserved for specific robots, with time intervals allocated for each region, allowing robots to determine and maintain a default path while calculating alternative paths when obstacles are detected, thereby minimizing collisions and ensuring task performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If robots autonomously calculate and traverse alternative paths to avoid obstacles and hazards, then collision avoidance capability is improved, but environmental entropy increases and collision likelihood increases
Solution Approach 1:
The environment is partitioned into discrete spatial regions that can be reserved and managed individually. This segmentation allows the system to control robot movements in a structured manner, reducing overall environmental entropy while maintaining collision avoidance capabilities through localized path planning within reserved regions.
Solution Approach 2:
Spatiotemporal regions are reserved in advance for robots before they traverse them. By pre-reserving regions and assigning time intervals, the system establishes predictable trajectories ahead of time, preventing the chaos that would result from multiple robots independently calculating alternative paths in real-time.
2Reliability
If robots take alternative paths around obstacles or hazards, then obstacle avoidance is improved, but task performance capability deteriorates
Solution Approach 1:
The system pre-calculates and reserves alternative paths within the spatiotemporal reservation framework before robots need to deviate from their primary trajectories. This allows robots to switch to alternative paths smoothly without task interruption, as the alternative paths are already planned and authorized within the reserved regions.
Solution Approach 2:
The reservation system dynamically adjusts to accommodate both primary and alternative paths. When obstacles are detected, robots can transition to pre-reserved alternative trajectories within their allocated spatiemporal regions, maintaining task progress while avoiding obstacles through flexible, dynamic path selection.
3Adaptability or versatility
If the number of autonomous and semi-autonomous robots in an environment increases, then system capability is improved, but collision likelihood increases
Solution Approach 1:
The environment is divided into multiple reservable spatial regions, allowing multiple robots to operate simultaneously in different segments without conflict. Each robot receives dedicated reservations in specific regions during specific time intervals, enabling scalable deployment while maintaining collision-free operation through spatial and temporal separation.
Solution Approach 2:
The spatiotemporal reservation system acts as an intermediary between multiple robots, coordinating their movements and preventing collisions. By managing reservations centrally or semi-centrally, the system mediates potential conflicts before they occur, allowing increased robot density while maintaining safety through structured coordination.
Data Source
AI summary
Methods, apparatus, systems, and computer-readable media are provided for spatiotemporal reservations for robots. In various implementations, a sequence of spatial regions of an environment, and a sequence of respective time intervals that are reserved for a robot to operate within the sequence of spatial regions, may be reserved for the robot. A default path through the sequence of spatial regions may be identified. During traversal of the default path, it may be determined that the default path will be unpassable by the robot through a given spatial region during a given time interval reserved for the robot to operate within the given spatial region. Thus, an alternative path through the given spatial region that is traversable by the robot during the given time interval may be identified. The robot may then be traversed along the alternative path through the given spatial region within the given time interval.