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Timing control system design of stellarator based on virtual instrument
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AI
DOI：10.1016/j.fusengdes.2026.115625.png)
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Abstract
En 中文
CN-H1 is a three-cycle quasi-spiral symmetric star simulator. The timing control system needs to manage the starting, running and closing sequence of the coil power supply, heating system, diagnosis system and other subsystems in a unified way, and the clock error is required to be controlled within +/- 2 microseconds to ensure the coordinated operation of each subsystem. This paper designs and implements a distributed timing control system centered on virtual instruments in response to the strict requirements for high-precision and multichannel timing control during the plasma discharge of stellarators. The system takes LabVIEW FPGA as the core execution module and realizes hardware-level parallel logic by using its graphical programming. Aiming at the complex timing logic of the stellarator, a hybrid programming model of state machine - event was designed to decompose the complex discharge process into configurable time segments, so as to achieve the purpose of real-time switching and dynamic adjustment of waveform segments during the experiment. The test results show that the nanosecond-level absolute delay of the system signal is completely transparent to millisecond-level applications. Meanwhile, the waveform synchronization error of any two channels of the system is better than 55ns. The system can stably generate complex timing waveforms with millisecond-level cycles, and the timing accuracy and synchronization performance significantly exceed those of conventional solutions. This design has the advantages of multi-channel output, simple operation and strong real-time performance. It fully meets the timing control requirements during the discharge of CN-H1 and has important engineering application value.
Keywords:
Timing control
Virtual instrumentation
CN-H1
Timing synchronization
Waveform generator
Journal
F
IF:
2
Papers:
232
Citations:
1.3W