ResearchResearch paperReinforcement Learning · Training & Scaling · Efficiency & Inference1 source · Oct 14, 2026

Topology-Preserving Multi-Usage Pipe Centerline Refinement under Permanent Tubular Occupancy

Discrete multi-group pipe routers place channels on a grid or coarse graph.

Key points

  • For permanently occupied fluid tubes---as in additively manufactured hydraulic manifolds---those corners are undesirable: they degrade geometric fairness and, in practice, flow quality.
  • This technical report studies the downstream geometric stage that starts from a fixed routing topology and a feasible coarse layout, and refines tubular centerlines under permanent clearance.
  • Unlike classical robotic path smoothing, which usually fair one temporary open trajectory, our setting is a branched manifold with declared terminal usages, finite tube radii, and static cross-group occupancy.
  • We formalize the refinement problem, highlight the multi-usage junction conflict that a single shared branch point cannot resolve, and outline a hybrid trunk-share / junction-split parameterization with soft geometric costs and hard clearance acceptance.

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