| 摘要 |
A helicopter deicing control system (10) is provided for selectively distributing D.C. electrical power to a plurality of deicing segments (80, 90) on main and tail rotor blades with only two slip-ring assemblies (60 and 61, 62 and 63) for each rotor drive shaft. A power distribution controller (20) receives electrical power from the helicopter's onboard, fixed electrical power system and provides an output signal including power and control D.C. electrical signals of opposite polarities. A distributor (70) receives the output signal from controller (20) and increments a rotary switch (74) upon receipt of a D.C. electrical control signal, and distributes power to the main rotor deicing segment (90) connected to the rotary switch (74) contact then engaged upon the receipt of a D.C. electrical power signal so as to sequentially deliver D.C. electrical power to the desired main rotor deicing segment. Controller (30) includes provisions for individually preselecting the operating time for each deicing segment (80, 90), testing the operation and providing a continuous visual indication of the operational status of deicing control system (10).
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