High speed trimaran pitch reducing control method based on fuzzy control method

Abstract

The invention provides a high speed trimaran pitch reducing control method based on a fuzzy control method. According to the method, a random wave model with the adding of an encounter frequency is introduced, random wave is taken as a system input, an ANSYS platform is used to analyze and obtain a trimaran hydrodynamic coefficient, a high speed trimaran longitudinal motion mathematical model is established according to the hydrodynamic coefficient, a membership function of a fuzzy control method is designed for the trimaran model, an input quantity is mapped as a fuzzy set of an input domain through the membership function, thus a 7*7 trimaran fuzzy control rule is designed, an incident flow attack angle change amount of a pitch reducing appendage is dynamically controlled according to a control rule, thus longitudinal force and torque provided by the pitch reducing appendage to a trimaran are controlled, longitudinal swing brought by waves is offset to the maximum, and the longitudinal swing reduction control of the high speed trimaran is realized. According to the high speed trimaran pitch reducing control method, a ship heaving height and a longitudinal swing angle in a motion process are reduced, and the stability and passenger comfort in the trimaran high speed operation process can be effectively controlled and improved.

Description

technical field [0001] The invention belongs to the field of pitch reduction control of high-speed trimaran, in particular to a high-speed trimaran pitch reduction control method based on a fuzzy control method. Background technique [0002] The use of the controller in the anti-rolling of high-speed ships has always been a key part of the performance research of trimaran, and the design of control algorithm has always been an important subject in control engineering. Different from the traditional controller design, fuzzy control does not need to study some behavioral parameters of the system, but is more inclined to summarize and summarize the operator's experience. [0003] Nowadays, the application of fuzzy control method in ship control mainly focuses on the control of monohull and low-speed ship. For the high-speed and slender trimarans that are gradually being paid more and more attention in military and civilian use, how to realize Introducing a suitable control met...

AI Technical Summary

Problems solved by technology

Although the traditional PID control method is simple, it has poor flexibility and poor reliability. It is only suitable for systems with constant parameters of the controlled object and non-serious nonlinearity. It cannot achieve accurate tracking and control in terms of nonlinear control. In a complex operating environment, it is impossible to adjust and optimize the control rules in a timely manner according to the real-time situation

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