{"artifact_id":"L1-124","layer":"L1","title":"Vibration-Based Damage Detection (modal analysis NDT)","domain":"Industrial Inspection","sub_domain":"Modal / operational deflection shape damage ID","physics_fingerprint":{"L_DAG":3.5,"title":"Vibration-Based Damage Detection (modal analysis NDT)","domain":"Industrial Inspection","carrier":"acoustic","primitives":["L.excite.broadband","D.accelerometer_array","L.modal_extract","int.temporal"],"sub_domain":"Modal / operational deflection shape damage ID","noise_model":"gaussian","problem_class":"nonlinear_inverse","solution_space":"damage_location_severity","difficulty_delta":5,"integration_axis":"temporal","sensing_mechanism":"modal_vibration_analysis"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered damage location severity is guaranteed within the declared Omega bounds. Uniqueness is local rather than global (non-convex landscape); convergence depends on initialisation and priors. Stability is moderately conditioned (kappa_eff ~= 12); environmental_variability dominates the stability cliff; operational_load_variation and the remaining mismatch parameters contribute higher-order bias terms. Additive gaussian thermal/electronic noise sets the irreducible data-fidelity floor, while mild Tikhonov or analytic inversion is sufficient at the nominal Omega point.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"SNR_dB":25,"N_modes":10,"N_sensors":32,"f_range_Hz":[0.1,200],"T_acquire_s":60,"mode_truncation":0.0,"environmental_variability":0.0,"operational_load_variation":0.0},"input_format":"measurement_only","problem_class":"vibration_damage","forward_operator":"vibration_damage_forward","epsilon_fn_center":"20.0"},"omega_bounds":{"SNR_dB":[0.0,40.0],"N_modes":[3,50],"N_sensors":[4,500],"T_acquire_s":[5,3600],"sensor_noise":[0.0,0.2],"mode_truncation":[0.0,0.5],"environmental_variability":[0.0,0.2],"operational_load_variation":[0.0,0.3]},"epsilon_bounds":{"psnr_db":[5.0,40.0]},"allowed_problem_classes":["vibration_damage"],"allowed_omega_dimensions":["N_sensors","N_modes","f_range_Hz","SNR_dB","T_acquire_s","environmental_variability","operational_load_variation","mode_truncation","environmental_variability","operational_load_variation","sensor_noise","mode_truncation"],"allowed_forward_operators":["vibration_damage_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":240,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x7c2f432e98c71305c202164d4f77c98396401aa481b79fbfc4a16a9716430b14","chain_tx_hash":"0xda465af1a2a3a051daef3e32cca2720f01adf98be5d445fcd5ac952325f916ea","chain_block":41554212}