Abstract
According to the working principle of pulse oxygen supplies, we analyze how to realize the control of the oxygen flow by double different valves. a two-dimensional fuzzy control system is proposed to solve the unstable problem, which is brought by the shortcomings of the open-loop control system. We add a new parameter, the rate of the differential pressure signal changes, which contributes to a close –loop control system and increases the stability of the system. The experiments and the data show that the fuzzy control system make the process of breathing much more comfortable and solve the hysteresis and overshoot caused by the open-loop control system. The product reliability has been greatly improved.
Highlights
The normal flight height of the new generation military helicopter is (2000~4000) m, with the limit of (5000 ~ 6000) m
Helicopters are gradually equipped with the oxygen supply system in the United States and some other developed countries
Once the differential pressure sensor detects the pressure changes over 20Pa between the outlet tube and the outside air environment, the controller controls the electronic valves to change their state to be opening
Summary
The normal flight height of the new generation military helicopter is (2000~4000) m, with the limit of (5000 ~ 6000) m. US PHODS has developed a single pulse oxygen supply device and a double pulse oxygen supply device which makes the maximum utilization use of oxygen and achieve a breakthrough in the design of its weight and size; India IAF has developed an oxygen supply system which can be working for more than two hours. This system was initially developed for the "Cheetah" helicopter, and their plan is to develop a gas supply system which can be equipped for rice-17 and Dhruv helicopters. Whether the electronic oxygen regulator can adjust the flow rate with height changes automatically affects the system to achieve timely, precise and large amount of air supplement[4]
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