{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:344OGCMK2D5JBJSFKOBMOZXBFV","short_pith_number":"pith:344OGCMK","canonical_record":{"source":{"id":"1907.06751","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2019-07-15T20:59:34Z","cross_cats_sorted":["cs.SY","math.OC"],"title_canon_sha256":"2ef2e0c45a9f06c6c320e53f53517daca0a313316e4b38533fe1347dbeac75d0","abstract_canon_sha256":"13145473a944358ab674dbc74723e7484cf223fe51d844d94ce33f94eadd9246"},"schema_version":"1.0"},"canonical_sha256":"df38e3098ad0fa90a6455382c766e12d685817d3ccb6f3162ca3b4230d6aa70e","source":{"kind":"arxiv","id":"1907.06751","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.06751","created_at":"2026-05-17T23:39:23Z"},{"alias_kind":"arxiv_version","alias_value":"1907.06751v3","created_at":"2026-05-17T23:39:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.06751","created_at":"2026-05-17T23:39:23Z"},{"alias_kind":"pith_short_12","alias_value":"344OGCMK2D5J","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"344OGCMK2D5JBJSF","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"344OGCMK","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:344OGCMK2D5JBJSFKOBMOZXBFV","target":"record","payload":{"canonical_record":{"source":{"id":"1907.06751","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2019-07-15T20:59:34Z","cross_cats_sorted":["cs.SY","math.OC"],"title_canon_sha256":"2ef2e0c45a9f06c6c320e53f53517daca0a313316e4b38533fe1347dbeac75d0","abstract_canon_sha256":"13145473a944358ab674dbc74723e7484cf223fe51d844d94ce33f94eadd9246"},"schema_version":"1.0"},"canonical_sha256":"df38e3098ad0fa90a6455382c766e12d685817d3ccb6f3162ca3b4230d6aa70e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:39:23.619073Z","signature_b64":"W41H7zuj/N6a+VjjAqt1DYwGDZLTPj7th/dPgTqM/q1XZSwlNCvTWBw9uZ2f/ENOJDyhx37ytOoo7IlGHWHeCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"df38e3098ad0fa90a6455382c766e12d685817d3ccb6f3162ca3b4230d6aa70e","last_reissued_at":"2026-05-17T23:39:23.618412Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:39:23.618412Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.06751","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:39:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NMBOq9NP/koZWBv/qEWs9hPCZsFsH31lyNrvcbTZ62eCYwy7jonP9U6WRsE+QO2ogr00K8ANtsaLPPWI24SfDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T19:46:12.620679Z"},"content_sha256":"e8ee81a8c325d6c5af427ea32fada1916ebae2fa5f2556b52b593de2413a4d14","schema_version":"1.0","event_id":"sha256:e8ee81a8c325d6c5af427ea32fada1916ebae2fa5f2556b52b593de2413a4d14"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:344OGCMK2D5JBJSFKOBMOZXBFV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Development of a General Momentum Exchange Devices Fault Model for Spacecraft Fault-Tolerant Control System Design","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SY","math.OC"],"primary_cat":"eess.SY","authors_text":"Chengfei Yue, Cher Hiang Goh, Feng Wang, Qiang Shen, Tong Heng Lee, Xibin Cao","submitted_at":"2019-07-15T20:59:34Z","abstract_excerpt":"This paper investigates the mechanism of various faults of momentum exchange devices. These devices are modeled as a cascade electric motor EM - variable speed drive VSD system. Considering the mechanical part of the EM and the VSD system, the potential faults are reviewed and summarized. Thus with a clear understanding of these potential faults, a general fault model in a cascade multiplicative structure is established for momentum exchange devices. Based on this general model, various fault scenarios can be simulated, and the possible output can be appropriately visualized. In this paper, si"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.06751","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:39:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h/6J/1rZxNDB+J46kU/+VYx0TOGaKETr4WSj/uUzPZaeIt+4rkwqLg2/vhNOpu6g7v1RbhjdRqeW06wpQ8JOCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T19:46:12.621027Z"},"content_sha256":"a56fa0c2dbeccbd2155e1548a1b2bebb286c63ed5fe1986fa0b7392e0dc135d8","schema_version":"1.0","event_id":"sha256:a56fa0c2dbeccbd2155e1548a1b2bebb286c63ed5fe1986fa0b7392e0dc135d8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/344OGCMK2D5JBJSFKOBMOZXBFV/bundle.json","state_url":"https://pith.science/pith/344OGCMK2D5JBJSFKOBMOZXBFV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/344OGCMK2D5JBJSFKOBMOZXBFV/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-20T19:46:12Z","links":{"resolver":"https://pith.science/pith/344OGCMK2D5JBJSFKOBMOZXBFV","bundle":"https://pith.science/pith/344OGCMK2D5JBJSFKOBMOZXBFV/bundle.json","state":"https://pith.science/pith/344OGCMK2D5JBJSFKOBMOZXBFV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/344OGCMK2D5JBJSFKOBMOZXBFV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:344OGCMK2D5JBJSFKOBMOZXBFV","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"13145473a944358ab674dbc74723e7484cf223fe51d844d94ce33f94eadd9246","cross_cats_sorted":["cs.SY","math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2019-07-15T20:59:34Z","title_canon_sha256":"2ef2e0c45a9f06c6c320e53f53517daca0a313316e4b38533fe1347dbeac75d0"},"schema_version":"1.0","source":{"id":"1907.06751","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.06751","created_at":"2026-05-17T23:39:23Z"},{"alias_kind":"arxiv_version","alias_value":"1907.06751v3","created_at":"2026-05-17T23:39:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.06751","created_at":"2026-05-17T23:39:23Z"},{"alias_kind":"pith_short_12","alias_value":"344OGCMK2D5J","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"344OGCMK2D5JBJSF","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"344OGCMK","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:a56fa0c2dbeccbd2155e1548a1b2bebb286c63ed5fe1986fa0b7392e0dc135d8","target":"graph","created_at":"2026-05-17T23:39:23Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"This paper investigates the mechanism of various faults of momentum exchange devices. These devices are modeled as a cascade electric motor EM - variable speed drive VSD system. Considering the mechanical part of the EM and the VSD system, the potential faults are reviewed and summarized. Thus with a clear understanding of these potential faults, a general fault model in a cascade multiplicative structure is established for momentum exchange devices. Based on this general model, various fault scenarios can be simulated, and the possible output can be appropriately visualized. In this paper, si","authors_text":"Chengfei Yue, Cher Hiang Goh, Feng Wang, Qiang Shen, Tong Heng Lee, Xibin Cao","cross_cats":["cs.SY","math.OC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2019-07-15T20:59:34Z","title":"Development of a General Momentum Exchange Devices Fault Model for Spacecraft Fault-Tolerant Control System Design"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.06751","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:e8ee81a8c325d6c5af427ea32fada1916ebae2fa5f2556b52b593de2413a4d14","target":"record","created_at":"2026-05-17T23:39:23Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"13145473a944358ab674dbc74723e7484cf223fe51d844d94ce33f94eadd9246","cross_cats_sorted":["cs.SY","math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2019-07-15T20:59:34Z","title_canon_sha256":"2ef2e0c45a9f06c6c320e53f53517daca0a313316e4b38533fe1347dbeac75d0"},"schema_version":"1.0","source":{"id":"1907.06751","kind":"arxiv","version":3}},"canonical_sha256":"df38e3098ad0fa90a6455382c766e12d685817d3ccb6f3162ca3b4230d6aa70e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"df38e3098ad0fa90a6455382c766e12d685817d3ccb6f3162ca3b4230d6aa70e","first_computed_at":"2026-05-17T23:39:23.618412Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:23.618412Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"W41H7zuj/N6a+VjjAqt1DYwGDZLTPj7th/dPgTqM/q1XZSwlNCvTWBw9uZ2f/ENOJDyhx37ytOoo7IlGHWHeCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:23.619073Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.06751","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e8ee81a8c325d6c5af427ea32fada1916ebae2fa5f2556b52b593de2413a4d14","sha256:a56fa0c2dbeccbd2155e1548a1b2bebb286c63ed5fe1986fa0b7392e0dc135d8"],"state_sha256":"552d81eb4b6a8b6d227055e0478238f4cfb97a5ba2147e4ab19a4b3df2f15679"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dqzvi4YET3eNhyv+eGJdj3e1ujWFrZU0yVvYs0mPbbh7KpahkTyrXZTJqe+vv3ZyWndqGA5mtUV9op4Jma8yAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T19:46:12.623008Z","bundle_sha256":"8990f8c68e6e65644caf7158e28e8d20d4aae3d7f87510c06868b5d79cc78427"}}