Embedded distribution typepitch control system and control method for CPP

Abstract

The invention discloses an embedded distribution type pitch control system and control method for a CPP (Controllable Pitch Propeller). The system includes a main control unit, a standby control unit and an intelligent I / O module. The intelligent I / O module performs information transmission through a CAN bus. The system has a follow-up control mode and a non-follow-up control mode for pitch control of the CPP. In the follow-up control mode, the main control unit works and the standby control unit is in a semi-dormant state. When the main control unit goes wrong, the system enters the non-follow-up control mode and the standby control unit works. When the failures are removed, the system enters the follow-up control mode again. The system adopts the embedded control technology and introduces a bus communication method, requirements for communication between a controller and the intelligent I / O module is achieved through the CAN bus. Easiness and quickness are achieved. The embedded system has characteristics of small size and high reliability and is suitable for poor conditions on board. The modularized design facilitates system maintenance and update and can improve the intelligence and the reliability of the whole system distinctively.

Description

technical field [0001] The invention relates to a pitch control system and control method of a marine adjustable pitch propeller. Background technique [0002] Controllable pitch propeller CPP is a propeller that allows the blades to rotate relative to the hub to adjust the pitch through the operating mechanism arranged in the hub. It changes the pitch by turning the blades, thereby changing the speed of the ship or driving forward, reversing, etc. , the CPP control system issues a series of thrust commands to control the CPP, forming a time-varying thrust system. [0003] Traditional CPP control systems mostly use PLC as the main controller. As an adaptive controller, although it can meet the basic needs of the control system, the system is solidified and the wiring is complicated. The CPP, servo system, starter and local control box are arranged separately. The speed and communication distance are limited, and the system is bulky, resulting in a large span of signal lines...

AI Technical Summary

Problems solved by technology

[0003] Traditional CPP control systems mostly use PLC as the main controller. As an adaptive controller, although it can meet the basic needs of the control system, the system is solidified and the wiring is complicated. The CPP, servo system, starter and local control box are arranged separately. The speed and communication distance are limited, and the system is bulky, resulting in a large span of signal lines and many connections between devices. For complex ship conditions, it greatly increases the difficulty of ship wiring and the incidence of failures.

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