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http://dx.doi.org/10.5762/KAIS.2019.20.7.52

A Study on the Improvement of the Control Circuit Design of Controllable Pitch Propeller  

Kim, Dong-Young (Naval Sea Systems Team 1, Defence Agency for Technology and Quality)
Kang, Gu-Heon (Naval Sea Systems Team 1, Defence Agency for Technology and Quality)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.20, no.7, 2019 , pp. 52-60 More about this Journal
Abstract
The control circuit of the CPP applied to FFX Batch-I and LST-II may be capable of generating a backward pitch even when the grounding phenomenon occurs in the other system. The purpose of this study was to improve the CPP control circuit to maintain the pitch even in the event of grounding. Since the CPP control circuit changes the propeller angle with the voltage difference input, it has a design structure that can be vulnerable if the input voltage fluctuates instantaneously. In order to solve the above problem, a terminating resistor is applied to the end of the control wire and a signal converter is applied between the control wires, as a way to improve the CPP control circuit design. In order to verify that there is no problem in improving the CPP control circuit design, the CPP pitch change control was tested in the actual sailing commissioning with LST-II. Since the command pitch value and the feedback pitch value are very similar to each other, it is confirmed that the CPP control circuit is suitable for the control signal transmission because there is no problem in transmitting the control signal.
Keywords
Controllable Pitch Propeller; Circuit Analysis; Differential Amplifier; Terminating Resistor; Signal Isolator;
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