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arxiv: 2503.10475 · v4 · submitted 2025-03-13 · 💻 cs.RO · cs.SY· eess.SY

Stratified Topological Autonomy for Long-Range Coordination (STALC)

Pith reviewed 2026-05-22 23:41 UTC · model grok-4.3

classification 💻 cs.RO cs.SYeess.SY
keywords multi-robot planningtopological graphsmixed-integer programminghierarchical planningreconnaissancerisk minimizationreceding-horizon controlcoordination
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The pith

STALC combines topological graphs with mixed-integer programming to coordinate multi-robot plans across large environments.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper introduces a hierarchical method for multi-robot teams to plan coordinated actions over long ranges and times. It builds topological graphs that link free-space regions with features like risk and traversability, then applies a mixed-integer program to create global plans quickly. Local receding-horizon controllers handle short-term collision avoidance and formation keeping. This structure is tested in a reconnaissance task where robots must avoid detection while navigating together. The approach matters because it allows scaling to complex scenarios where full central planning would be too slow.

Core claim

STALC constructs topological graphs from environment data to capture connectivity between regions and problem-specific features such as traversability or risk. A novel mixed-integer programming formulation on these graphs generates highly-coupled multi-robot plans in seconds. Receding-horizon planners then achieve local collision avoidance and formation control, allowing the team to meet shared objectives like minimizing detection risk in reconnaissance scenarios, as shown in both simulation scaling tests and hardware experiments with real-world data.

What carries the argument

The stratified topological graph combined with a mixed-integer programming formulation for generating globally consistent multi-robot trajectories.

If this is right

  • Plans for complex multi-robot scenarios can be generated in seconds.
  • Graphs can be built from real-world data for hardware deployment.
  • The hierarchy allows planning across different spatial and temporal scales.
  • Local controllers execute global plans while maintaining collision avoidance and formations.
  • Shared objectives such as risk minimization are achieved through the coupled plans.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Similar layering might apply to other tasks requiring coordination without constant communication.
  • The method could extend to environments where risk features change over time if graphs are updated periodically.
  • By separating global and local planning, the approach may lower the computational burden compared to solving one large optimization at every step.

Load-bearing premise

Topological graphs that encode connectivity and features, together with the mixed-integer program, will yield plans that receding-horizon local controllers can execute without breaking the global coordination goals.

What would settle it

A hardware experiment where robots following the generated plans are detected by observers more often than the minimized risk level predicts, or where local controllers deviate in ways that violate the planned connectivity.

Figures

Figures reproduced from arXiv: 2503.10475 by Adam Goertz, Adam Polevoy, Bradley Woosley, Cora A. Duggan, John G. Rogers III, Joseph Moore, Kevin C. Wolfe, Mark Gonzales.

Figure 1
Figure 1. Figure 1: Experimental operational scenario to minimize visibility while travers [PITH_FULL_IMAGE:figures/full_fig_p001_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: STALC: Hierarchical planning architecture for a multi-robot team to autonomously coordinate while traversing an environment. The high-level planner [PITH_FULL_IMAGE:figures/full_fig_p005_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: Piecewise Linear Cost Functions TABLE I MIP PARAMETERS Category Var Description Problem Size nA Number of agents/robots nT Number of time steps in the time horizon nO Number of overwatch opportunities nE Number of directional edges nV Number of nodes/vertices nL Number of locations (nE + nV ) nB Number of start/begin locations nD Number of goal/destination locations Scenario Variables E Set of edges e V Se… view at source ↗
Figure 4
Figure 4. Figure 4: A visibility map: the observer is positioned in a clearing. The observer [PITH_FULL_IMAGE:figures/full_fig_p009_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: Regions of cover and A∗ paths overlaid on satellite imagery of the environment: cover regions are outlined in red and node numbers are located within the regions near the centroid of each region. 4) SplitRegions: For some maps and observer posi￾tions, the cover regions can be large and nonconvex. Conse￾quently, we enforce a maximum size, Ξmax, using the algorithm from [62] to find the minimum-length cut th… view at source ↗
Figure 6
Figure 6. Figure 6: The overwatch map from node 3. Pink and red shading denotes areas [PITH_FULL_IMAGE:figures/full_fig_p011_6.png] view at source ↗
Figure 7
Figure 7. Figure 7: Schematic topological graph with overwatch opportunities indicated [PITH_FULL_IMAGE:figures/full_fig_p011_7.png] view at source ↗
Figure 8
Figure 8. Figure 8: MIP problem solution to an illustrative MCRP, sketched in (a). Ten [PITH_FULL_IMAGE:figures/full_fig_p013_8.png] view at source ↗
Figure 9
Figure 9. Figure 9: Example bounding overwatch solution as all robots move from node 1 [PITH_FULL_IMAGE:figures/full_fig_p014_9.png] view at source ↗
Figure 10
Figure 10. Figure 10: Aerial map of a meadow environment showing a sample scenario. [PITH_FULL_IMAGE:figures/full_fig_p014_10.png] view at source ↗
Figure 13
Figure 13. Figure 13: Comparison of average computation time across state-of-the-art algorithms for multi-robot planning with overwatch opportunities across various [PITH_FULL_IMAGE:figures/full_fig_p015_13.png] view at source ↗
Figure 14
Figure 14. Figure 14: Optimality gap versus the number of robots for the learning-based [PITH_FULL_IMAGE:figures/full_fig_p015_14.png] view at source ↗
Figure 15
Figure 15. Figure 15: Sequential steps in our environment segmentation approach for a simulated meadows environment, as seen in (a). In (b), we generate a visibility [PITH_FULL_IMAGE:figures/full_fig_p016_15.png] view at source ↗
Figure 16
Figure 16. Figure 16: Graph generation for two different observer locations in an forested [PITH_FULL_IMAGE:figures/full_fig_p016_16.png] view at source ↗
Figure 17
Figure 17. Figure 17: Schematic forested graphs showing overwatch opportunities and team routes. Both robots start at node 0 and the goal is for one robot to node 6 and [PITH_FULL_IMAGE:figures/full_fig_p017_17.png] view at source ↗
Figure 18
Figure 18. Figure 18: Robots moving in formation approaching a cover region. [PITH_FULL_IMAGE:figures/full_fig_p017_18.png] view at source ↗
Figure 21
Figure 21. Figure 21: Environment segmentation for three different observer locations in an urban environment, including a case with multiple observers. The visibility [PITH_FULL_IMAGE:figures/full_fig_p018_21.png] view at source ↗
Figure 22
Figure 22. Figure 22: Planned routes on Urban Graph 1 showing the difference in routes [PITH_FULL_IMAGE:figures/full_fig_p018_22.png] view at source ↗
Figure 23
Figure 23. Figure 23: Planned routes on Urban Graph 2 showing the difference in routes [PITH_FULL_IMAGE:figures/full_fig_p018_23.png] view at source ↗
Figure 25
Figure 25. Figure 25: Observer views for Urban Graphs 1 and 2. The traversing robots are circled in red. In (c), the tower the observer is on in Urban Graph 1 is shown [PITH_FULL_IMAGE:figures/full_fig_p020_25.png] view at source ↗
read the original abstract

In this paper, we present Stratified Topological Autonomy for Long-Range Coordination (STALC), a hierarchical planning approach for multi-robot coordination in real-world environments with significant inter-robot spatial and temporal dependencies. At its core, STALC consists of a multi-robot graph-based planner which combines a topological graph with a novel, computationally efficient mixed-integer programming formulation to generate highly-coupled multi-robot plans in seconds. To enable autonomous planning across different spatial and temporal scales, we construct our graphs so that they capture connectivity between free-space regions and other problem-specific features, such as traversability or risk. We then use receding-horizon planners to achieve local collision avoidance and formation control. To evaluate our approach, we consider a multi-robot reconnaissance scenario where robots must autonomously coordinate to navigate through an environment while minimizing the risk of detection by observers. Through simulation-based experiments, we show that our approach is able to scale to address complex multi-robot planning scenarios. Through hardware experiments, we demonstrate our ability to generate graphs from real-world data and successfully plan across the entire hierarchy to achieve shared objectives.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

1 major / 0 minor

Summary. The paper proposes Stratified Topological Autonomy for Long-Range Coordination (STALC), a hierarchical multi-robot planning method that constructs topological graphs capturing free-space connectivity and problem-specific features (e.g., traversability or risk), solves a mixed-integer program over these graphs to produce coupled plans, and delegates local execution to receding-horizon controllers for collision avoidance and formation control. Evaluation is described in a reconnaissance scenario minimizing detection risk, with claims of scalability shown via simulation experiments and hardware feasibility demonstrated by generating graphs from real-world data and executing plans across the hierarchy.

Significance. If substantiated, the approach could supply a computationally tractable bridge between topological abstraction and MIP-based coordination for long-range multi-robot tasks with spatial-temporal coupling, extending standard hierarchical planning techniques to real-world settings.

major comments (1)
  1. [Abstract] Abstract: the central claims that the method 'is able to scale to address complex multi-robot planning scenarios' and 'successfully plan across the entire hierarchy' in hardware are unsupported by any quantitative results, error metrics, baseline comparisons, computation times, success rates, or derivation details on the MIP formulation or graph construction, preventing evaluation of the scalability and executability assertions.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for their review and the opportunity to clarify the presentation of our results. We respond to the major comment below.

read point-by-point responses
  1. Referee: [Abstract] Abstract: the central claims that the method 'is able to scale to address complex multi-robot planning scenarios' and 'successfully plan across the entire hierarchy' in hardware are unsupported by any quantitative results, error metrics, baseline comparisons, computation times, success rates, or derivation details on the MIP formulation or graph construction, preventing evaluation of the scalability and executability assertions.

    Authors: The manuscript body (Sections V and VI) reports simulation results showing scaling with robot count and environment size, along with MIP solve times; graph construction and MIP formulation details appear in Sections III and IV. Hardware experiments are presented as a feasibility demonstration of end-to-end execution from real-world sensor data rather than a quantitative benchmark study. We agree the abstract would be strengthened by explicit reference to these quantitative elements. We will revise the abstract to note reported computation times and scaling observations from simulation while describing the hardware component strictly as a successful hierarchy-wide execution demonstration. revision: yes

Circularity Check

0 steps flagged

No significant circularity identified

full rationale

The paper describes STALC as a hierarchical method using topological graphs capturing connectivity and features like traversability, combined with a mixed-integer programming formulation for multi-robot plans, followed by receding-horizon local controllers. Scalability and validity are asserted via simulation experiments on reconnaissance scenarios and hardware tests generating graphs from real-world data. No equations, fitting procedures, self-citations, uniqueness theorems, or ansatzes are present in the text. The central claims rest on empirical demonstration rather than any closed mathematical derivation that reduces outputs to inputs by construction, rendering the approach self-contained.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Only the abstract is available; no technical sections, equations, or implementation details are present from which free parameters, axioms, or invented entities can be extracted.

pith-pipeline@v0.9.0 · 5748 in / 1162 out tokens · 35259 ms · 2026-05-22T23:41:47.417307+00:00 · methodology

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