| Summary: | This paper discusses a network-based refueling control system with multiple control terminals that achieves the control input and display of near-aircraft position, refueling station, and centralized console. The system can achieve the closed-loop control of the refueling input flow, automatic control of the fixed refueling amount, and collection of environmental parameters, such as pipeline pressure, according to the refueling aircraft model. Moreover, the system can dynamically display parameter information of the refueling process in real time on three terminals. To meet the requirements of system functions and the real-time performance of tasks, this study selected the LPC2378 controller with the ARM core. The controller uses the µC/OS-II embedded real-time operating system as the software operating platform. To achieve the special requirements of the explosion-proof system, the explosion-proof 485 bus was employed to communicate with the display control unit (DCU) of the intrinsically safe contact aircraft stand and refueling station. The communication adopts the dual-redundant Ethernet communication and full-duplex 485 communication. To avoid the influence of external equipment on the control circuit, the power isolation method was adopted to ensure the stability of the system. After comprehensive debugging of hardware and software, we deem that the system has good performance and can be applied in engineering.
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