Counter-small-UAS is the center of gravity for Replicator-2 and JIATF-401. DIU ran a Low-Cost Sensing Challenge (won by MatrixSpace, with Guardian RF, Hidden Level, and Teledyne FLIR Defense as top performers), and the first Replicator-2 purchase in January 2026 went to Fortem's DroneHunter F700 interceptors. If your tech touches detecting or defeating small drones, there is real, fast money here — and it's judged on demonstrated physics, not slideware.
Detection is an electromagnetics problem. Radar and RF sensing coverage, antenna gain, sidelobes, and multipath all get designed and validated in Ansys HFSS. The goal is a defensible detection envelope: at what range, against what target size, with what false-alarm behavior.
If your defeat method flies — an interceptor drone or a net-carrying platform — its endurance and agility are CFD and FEA problems. Fluent resolves the aero and rotor performance; Mechanical checks the airframe under maneuver loads. Together they turn 'it should catch it' into a closing-speed and range calculation.
Counter-UAS is one of the hottest DIU lanes and it's simulation-heavy. Ask about an Ansys evaluation covering HFSS, Fluent, and LS-DYNA to build your C-sUAS case end to end.
See if you qualify for an Ansys eval The MVP playbook →The terminal event — kinetic impact, net capture, or fragmentation — happens in milliseconds and is nearly impossible to instrument fully in the field. LS-DYNA's explicit dynamics simulates the impact, capture, or blast so you can predict effectiveness and iterate the mechanism virtually.
Replicator-2 is explicit about affordability and volume — the whole point is fielding lots of counter-UAS capability cheaply. That reframes the simulation job: it's not just 'does one unit work?' but 'does it still work when the design is cost-optimized and produced at scale?' Simulation supports the value-engineering trades (cheaper materials via Granta, simpler cooling, fewer parts) without silently breaking performance. It also lets you rehearse multi-threat and swarm scenarios that are impractical to stage on a live range.
The strongest C-sUAS teams present all three domains as one system model: detect at range X, close in time Y, defeat with probability Z. That's a far more credible pitch than a single bench demo. For the broader picture, read simulation for dual-use hardware, and to fund it, start with the DIU CSO process.
Official sources: DIU — C-sUAS Low-Cost Sensing winner · Army.mil — First Replicator-2 purchase. Figures change; confirm on the official page before relying on them.
