{"abstention_reason":null,"arm":"SUBSTRATE_DIVERSE_P2","candidate_id":"stock_flow_accumulation_control__engineering_design__SUBSTRATE_DIVERSE_P2","cell_id":"stock_flow_accumulation_control__engineering_design","decision":"PROPOSAL","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","proposal":{"actors":["Electromechanical design engineer who owns the actuator thermal architecture","Test engineer who runs instrumented duty-cycle trials","Reliability engineer who evaluates insulation and bearing temperature limits","Electrical safety engineer who approves isolation, sensor, and heater-fixture protections","Design authority who approves materials, thermal limits, duty envelopes, and production changes"],"affected_objective":"Keep the excess thermal-energy stock in a sealed high-duty electromechanical actuator's windings, stator, and rotor below a design-approved ceiling during repeated load bursts while preserving electrical isolation, mechanical clearance, and sufficient passive cooling reserve.","arm":"SUBSTRATE_DIVERSE_P2","authority_safety":{"authorized_first_step":"The test engineer may build and test a non-production thermal surrogate containing representative stator laminations, winding insulation, approved heater elements, candidate conductive bridges, and a contained phase-change cassette, under existing laboratory electrical, pressure, temperature, and fire-safety limits.","decision_authority":"The design authority retains approval of actuator materials, electrical isolation, thermal ceilings, phase-change material, mechanical interfaces, duty envelope, and any production incorporation; test personnel may only exercise the bounded surrogate protocol and halt or quarantine hardware.","excluded_actions":["Installing the candidate assembly in fielded or safety-critical equipment","Increasing actuator duty limits from surrogate results alone","Using a phase-change material without containment, compatibility, and flammability review","Creating an electrically conductive path that violates creepage, clearance, or insulation requirements","Allowing the enclosure surface, bearings, magnets, lubricant, or insulation to exceed approved limits","Treating a surface-temperature plateau as proof that internal thermal energy has cleared","Ignoring heat displaced into the phase-change cassette, housing, mounts, or neighboring equipment"],"halt_rollback":"De-energize the surrogate and revert to the unmodified reference configuration if insulation monitoring changes, containment leaks or deforms, any approved temperature or pressure limit is reached, the heat balance residual exceeds the preset tolerance, or the candidate creates an unsafe housing hot spot. Quarantine the assembly for design-authority review."},"baseline":"The sealed actuator is qualified using peak current, duty duration, housing temperature, and cooldown time. Heat leaves the windings and rotor through existing interfaces, but no explicit joule-denominated estimate tracks retained hot-core energy across repeated bursts; consequently, a cool housing or reduced current can be interpreted as recovery while delayed heat remains inside the active components.","candidate_id":"stock_flow_accumulation_control__engineering_design__SUBSTRATE_DIVERSE_P2","causal_chain":["Electrical resistance, magnetic loss, bearing friction, and rotor windage convert input energy into heat within the actuator's active components during each load burst.","Because internal generation can exceed conduction and convection during a burst, excess thermal energy persists in windings, stator, and rotor after instantaneous power falls.","Housing temperature responds after internal transport delays and therefore can remain acceptable while the hot-core energy stock grows across closely spaced cycles.","A thermally conductive but electrically isolating bridge increases passive transfer from the stator and winding region into a contained phase-change cassette.","Melting in the cassette absorbs transferred energy as latent heat, temporarily expanding physical thermal capacity without requiring software or an active controller.","Between bursts, a passive path from the cassette to the enclosure increases heat rejection to the environment, restoring latent-heat reserve before the next cycle.","Calorimetric reconciliation of electrical losses, measured boundary heat flux, component temperatures, and cassette melt fraction tests whether hot-core stock declines and whether heat has accumulated in a coupled reservoir.","The design authority accepts, resizes, or rejects the material intervention based on bounded surrogate evidence, including saturation, delayed rebound, isolation, aging, and external hot-spot tests."],"cell_id":"stock_flow_accumulation_control__engineering_design","consequence":"Unrecognized hot-core accumulation can drive winding insulation, magnets, bearings, or lubricant past allowable temperatures during later cycles even when current and housing temperature appear acceptable. Excessive or poorly placed thermal buffering can instead add mass, saturate, leak, impede heat rejection, or displace hazardous heat into the housing or adjacent structures.","diversity_from_prior_proposals":"The sealed P1 controls retained water mass before composite cure through a moisture ledger and process gate. This P2 controls accumulated thermal energy during cyclic actuator operation through passive conductive paths and latent-heat material. The affected failure, physical stock, intervention, and causal path are independent of moisture uptake, drying, layup manufacture, and cure release.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","intervention":"Add a contained annular phase-change cassette beside the actuator stator, coupled through electrically isolating high-conductivity bridges and a passive rejection path to the enclosure. On a representative surrogate, define hot-core stock as joules above a reference equilibrium within the windings, stator, and rotor; estimate inflow from measured electrical and mechanical losses; estimate outflow from calibrated boundary heat-flux sensors; and reconcile the balance against internal temperatures and cassette melt fraction. Size the cassette and bridges so the hot-core stock remains below its approved ceiling over the specified burst window and the cassette regains a prescribed latent-capacity reserve during cooldown.","mechanism_mapping":[{"counterfactual_removal":"Without a reconciled energy balance, current, surface temperature, and cooldown duration cannot distinguish retained internal heat from heat already transferred across the boundary.","mechanism_slug":"stock_flow_balance_reconciliation","role":"Compares the measured change in hot-core energy with integrated loss generation, conductive transfer, and boundary heat rejection in joules."},{"counterfactual_removal":"Without increased passive transfer and rejection, measurement alone leaves the positive net-energy trajectory unchanged.","mechanism_slug":"net_flow_lever_adjustment","role":"High-conductivity bridges increase outflow from active components, while the enclosure path clears energy from the coupled cassette between bursts."},{"counterfactual_removal":"Without additional latent capacity, closely spaced bursts can exceed the active components' temperature-compatible energy ceiling before ordinary cooling responds.","mechanism_slug":"stock_level_buffering","role":"The phase-change cassette accepts transferred energy through a material phase transition, buffering short inflow excursions without an equivalent immediate temperature rise."},{"counterfactual_removal":"Without explicit ceilings and reserve floors, the design cannot determine when the hot core is unsafe or when the cassette lacks capacity for another burst.","mechanism_slug":"accumulation_threshold_alert","role":"Applies approved limits to estimated hot-core joules and a minimum unmelted latent-capacity reserve rather than relying solely on instantaneous power or housing temperature."},{"counterfactual_removal":"Without tracking the cassette, enclosure, mounts, and rebound after shutdown, an apparent hot-core improvement could merely relocate the thermal stock.","mechanism_slug":"hidden_accumulation_probe","role":"Measures cassette melt fraction, housing heat flux, external hot spots, and delayed component-temperature rebound to identify displaced accumulation."},{"counterfactual_removal":"Without transport-lag characterization, short tests may miss delayed rotor-to-stator transfer or may repeat bursts before latent capacity has recovered.","mechanism_slug":"delay_compensated_control","role":"Uses calibrated heating, soak, and cooldown observations to set the evaluation window and required passive recovery interval."}],"nearest_rivals":["A larger external fan, which increases convective flow but may not intercept delayed heat trapped inside a sealed rotor and winding assembly","A current or duty-cycle limit, which constrains an inflow proxy but does not measure carried-over internal energy across cycles","Housing-temperature shutdown, which observes a delayed boundary condition rather than the distributed hot-core energy stock","A larger metal housing, which adds sensible-heat capacity but may impose greater mass and surface-temperature penalties without a defined latent reserve","An actively pumped liquid-cooling loop, which can increase heat removal but introduces pumps, controls, seals, and failure modes absent from the passive material intervention"],"negative_tests":{"intervention_falsifier":"The intervention is falsified for the bounded design if blinded surrogate trials across the prespecified burst sequences show no reproducible reduction in peak or end-of-window hot-core energy relative to an equal-mass reference, if the cassette fails to restore its required reserve during the approved cooldown, if balance residuals exceed tolerance, or if electrical isolation, containment, aging, housing-temperature, or mechanical-clearance requirements are violated.","problem_falsifier":"The problem is falsified if internal calorimetry shows no persistent energy carryover between permitted cycles, housing temperature uniquely determines internal thermal state within the required tolerance, or component limits depend only on instantaneous power rather than time-integrated generation and removal.","risks":["The phase-change material may leak, swell, become flammable, separate, or change transition temperature with cycling.","A conductive bridge may compromise electrical isolation, vibration tolerance, or rotor and bearing clearances.","The cassette may saturate during an unusually long burst sequence and then behave as inert added mass.","Heat rejected from the cassette may create unsafe enclosure, mounting, cable, or neighboring-component temperatures.","Temperature and heat-flux sensors may perturb the thermal paths they are intended to measure.","Electrical-input measurements may misestimate heat generation when mechanical output, magnetic loss, or friction is uncertain.","A surrogate's geometry and contact resistance may not represent a production actuator.","Repeated phase transitions and thermal expansion may fatigue containment or degrade interface pressure.","Added material may reduce power density or create unacceptable lifecycle and service constraints."],"strongest_counterevidence":"If representative tests show that existing housing temperature and duty limits already bound winding, rotor, magnet, bearing, and lubricant temperatures with adequate margin across worst-case cycle histories, and an equal-mass phase-change assembly does not outperform ordinary conductive mass after aging and saturation tests, the proposed stock-control intervention adds no useful protection."},"next_evidence_step":"Construct one non-production paired surrogate test: use identical heater-defined active cores with the reference housing on one fixture and the contained phase-change cassette plus isolating bridges on the other. Preregister the thermal boundary, reference state, burst sequences, joule balance, stock ceiling, cassette reserve floor, cooldown window, reconciliation tolerance, isolation limits, and falsifiers. Measure electrical input, simulated mechanical extraction, internal temperatures, boundary heat flux, housing hot spots, insulation resistance, and cassette melt fraction through repeated heating, soak, cooldown, saturation, and delayed-rebound trials.","observable_state":"At each sample time, the test record reports estimated hot-core joules above reference equilibrium with uncertainty, cumulative joules generated, cumulative joules transferred out of the hot-core boundary, unexplained balance residual, winding/stator/rotor temperature estimates, cassette melt fraction, remaining latent-capacity reserve, housing heat rejection, delayed rebound, and distance from approved stock and component thresholds.","prior_art_status":"UNSEARCHED","problem":"In sealed high-duty electromechanical actuators, repeated short load bursts deposit heat in windings, stator laminations, rotor, magnets, and bearings faster than internal conduction can clear it. Qualification based on peak current, housing temperature, or elapsed cooldown treats flows and delayed surface conditions as substitutes for the retained thermal-energy level. A sequence of individually permitted bursts can therefore accumulate a hazardous hot-core stock while the enclosure still appears cool.","proposal_index":2,"remaining_contrastive_claim":"For a sealed actuator with transport delay between active components and its housing, a passive latent-heat cassette connected by electrically isolating thermal bridges can alter the hot-core energy trajectory across repeated bursts even if all software, logging, and duty-gating wrappers are removed.","revision_record":{"claim_changes":["The initial claim is limited to a bounded comparison of hot-core energy trajectory, reserve recovery, and component temperatures on representative surrogates.","No claim of novelty, prevalence, production readiness, service-life improvement, or transferable effect size is made."],"conceptual_changes":["The proposal instantiates the archetype as accumulated thermal energy rather than retained material mass.","The controlled stock is hot-core energy in active actuator components; the phase-change cassette is an explicitly monitored coupled stock and capacity buffer."],"evidence_changes":["No prior-art search or external evidence is asserted.","Evidence is confined to a preregistered paired-surrogate calorimetry, saturation, recovery, isolation, and aging test."],"operational_changes":["The first step is limited to non-production laboratory surrogates and approved heater-fixture limits.","Any production material, geometry, duty-envelope, or acceptance change remains subject to design-authority qualification."],"parent_version":null,"progress_targets_addressed":["Materially independent problem, intervention, and causal path relative to sealed P1","Persistent stock, unit, boundary, inflows, outflows, coupled reservoir, and delays specified","Physical material mechanism remains effective without computational or governance wrappers","Thresholds, residuals, falsifiers, risks, authority limits, and bounded evidence step specified"]},"schema_version":1,"structural_mapping":[{"archetype_element":"Persistent stock with unit, boundary, owner, source, and cadence","domain_realization":"Excess thermal energy, in joules above a fixed reference equilibrium, inside the winding-stator-rotor hot-core boundary; owned by the electromechanical design engineer and estimated from calibrated calorimetry at the test sampling cadence."},{"archetype_element":"Inflows and conversion","domain_realization":"Electrical resistance, magnetic hysteresis and eddy losses, bearing friction, and windage convert electrical or mechanical input into hot-core thermal energy."},{"archetype_element":"Outflow and clearance","domain_realization":"Conduction through insulating interfaces and candidate bridges transfers energy from the hot core; the cassette-to-enclosure path and external convection and radiation clear it from the coupled assembly."},{"archetype_element":"Net-flow balance and residual","domain_realization":"Observed hot-core energy change is reconciled against integrated loss generation minus measured conductive and boundary heat transfer, with uncertain mechanical extraction and sensor error retained as an explicit residual."},{"archetype_element":"Target band and capacity limit","domain_realization":"A design-approved hot-core energy ceiling protects insulation, magnets, bearings, and lubricant; a minimum unmelted fraction preserves enough cassette capacity for the next specified burst."},{"archetype_element":"Physical intervention levers","domain_realization":"Electrically isolating conductive bridges increase transfer, a contained phase-change material increases latent capacity, and a passive enclosure path increases inter-burst clearance."},{"archetype_element":"Delays and nonlinear thresholds","domain_realization":"Rotor and winding heat reaches the stator and housing after transport delay; latent absorption changes sharply across the melting interval and disappears when the cassette saturates."},{"archetype_element":"Hidden and coupled stocks","domain_realization":"Thermal energy can relocate into the cassette, housing, mounts, lubricant, bearings, cables, or neighboring structure and later rebound into active components."},{"archetype_element":"Monitoring after intervention","domain_realization":"Repeated paired trials measure internal temperature, heat flux, melt fraction, housing hot spots, residual energy, saturation behavior, and recovery over complete burst-and-cooldown windows."},{"archetype_element":"Retuning or retirement","domain_realization":"The design authority may resize, relocate, reject, or remove the cassette and bridges after evidence establishes whether thermal stock and latent reserve remain within approved bands without creating coupled hazards."}],"substrate_contract":{"counterfactual_independence":"Removing the P1 moisture ledger, composite materials, drying operations, cure-entry gate, and all associated measurements does not alter this opportunity: actuator loss heat still accumulates across bursts, and passive phase change plus conductive transfer still changes its trajectory.","forbidden_channel_audit":"Software, algorithms, databases, training, incentives, schedules, and approval gates may record or constrain testing but do not create the claimed effect. If every such wrapper is removed, the conductive bridges still transfer heat, the phase-change material still absorbs latent energy, and the passive enclosure path still rejects it. Removing those physical elements eliminates the essential effect.","primary_allowed_process":"PHYSICAL_MATERIAL"},"title":"Passive Latent-Heat Buffer for Hidden Thermal-Energy Accumulation in Sealed Actuators","version":0},"schema_version":1}