Development of a Shipboard Remote Control and Telemetry Experimental System for Large-Scale Model's Motions and Loads Measurement in Realistic Sea Waves.

Jialong Jiao,Chaohe Chen,Huilong Ren,Christiaan Adika Adenya

doi:10.3390/s17112485

Abstract

Wave-induced motion and load responses are important criteria for ship performance evaluation. Physical experiments have long been an indispensable tool in the predictions of ship’s navigation state, speed, motions, accelerations, sectional loads and wave impact pressure. Currently, majority of the experiments are conducted in laboratory tank environment, where the wave environments are different from the realistic sea waves. In this paper, a laboratory tank testing system for ship motions and loads measurement is reviewed and reported first. Then, a novel large-scale model measurement technique is developed based on the laboratory testing foundations to obtain accurate motion and load responses of ships in realistic sea conditions. For this purpose, a suite of advanced remote control and telemetry experimental system was developed in-house to allow for the implementation of large-scale model seakeeping measurement at sea. The experimental system includes a series of technique sensors, e.g., the Global Position System/Inertial Navigation System (GPS/INS) module, course top, optical fiber sensors, strain gauges, pressure sensors and accelerometers. The developed measurement system was tested by field experiments in coastal seas, which indicates that the proposed large-scale model testing scheme is capable and feasible. Meaningful data including ocean environment parameters, ship navigation state, motions and loads were obtained through the sea trial campaign.

Highlights

Ships play an important role in both civilian and military activities, and serve a wide variety of purposes, which include transportation of goods and passengers, naval and marine operations, and oceanic resource exploration [1]
For aa comparative investigation ofofthe results, thethe motion and load responses by Forwave comparative investigation the experimental results, motion and load responses typical conditions are involved in experimental the comparative investigation: the design sea state different testing methods similar random conditions are compared
This paper paper mainly mainly presents presentsthe thedesign, design,assembly assembly and and testing testing of ofan anadvanced advanced shipboard shipboard remote remote controlled and telemetry experimental system for large-scale model’s motions and loads controlled and telemetry experimental system for large-scale model’s motionsmeasurement and loads at sea, which was builtwhich on thewas laboratory foundations

Summary

Introduction

Ships play an important role in both civilian and military activities, and serve a wide variety of purposes, which include transportation of goods and passengers, naval and marine operations, and oceanic resource exploration [1]. Since there exist waves over 70% of the time in the open seas, ships are subjected to wave-induced motions and loads during their whole lifetime [2]. The structural strength and elastic deformation of large flexible ships in waves should be of concern to the designers and operators [3]. Ships require good seakeeping ability and enough structural strength to fulfill their designated functions, even in harsh seas [4]. Sensors 2017, 17, 2485 predictions of wave-induced ship motions and loads are important for ship design, optimization and operation.

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