PMT-TC: A Programmable Multi-Event Triggering and Timing Coordination System for Rocket-Sled Ejection Tests

Fixed delays and single-state thresholds are difficult to adapt to dependent event sequences, short authorization windows, and multi-parameter constraints in rocket-sled ejection tests. This study presents PMT-TC, a programmable multi-event triggering and timing coordination system. It provides multi-source state validation, mission-table-driven closed-window and Boolean-predicate evaluation, predecessor-gated one-shot output, and time-correlated event recording. Compared with fixed-delay or single-speed triggering, PMT-TC changes event variables and logic between missions while preserving order, data-validity and safety gates, and records for post-test verification. An onboard–ground cooperative architecture links pre-test configuration, autonomous onboard execution, buffered recording, and post-test reconstruction on a common mission-relative time base. Validation comprised vibration and shock tests, navigation and integration tests, development-stage strategy comparisons, and two mission-scale tests. Across the two tested configurations, all six E1–E3 events were issued in order. In mission B, Hall-effect and BDS integer speed fields agreed at six time-aligned samples across three 500 ms windows; E3 was authorized at 6.92762240 s and 211 m/s by an AND predicate combining dual-source equality, speed, and time conditions. These results support programmable mission execution and traceable reconstruction within the tested configurations.