Method and system for testing a control system of a marine vessel

Abstract

A method for verifying a control system (2) of a vessel (4), in which said control system (2) in its operative state receives sensor signals (7) from sensors (8) and command signals (9) from command input devices (10), and as a response provides control signals (13) to actuators (3) in order to maintain a desired position, velocity, course or other state of said vessel (4), characterized by the following steps: during a time (t0), disconnecting the reception of real sensor signals (7a, 7b, 7c, ..) and replacing said real sensor signals by a test sequence (T0) of artificial measurements (7a', 7b', 7c', ..) from a test signal source (41); letting said control system (2) work based on the artificial sensor signals (7, 7') to generate control signals (13') to be recorded as a response (S0) to said first test sequence (T0) for said first time (t0) on a control signal logger (42) and storing response (SO) to the test sequence (T0) as the control system's (2) ''signature'' response (S0); said method having the purpose of, at a later time (t1, t2, t3, ..), to use the test sequence (T0) input to the control system (2), and record a later response (S1, S2, S3, ...) and determining whether said later response similar to the signature response (S0) to verify that said control system (2) is unchanged, or not.

Description

technical field [0001] The present invention relates to a system for obtaining a verifiable control system signature after acceptance of a vessel at sea by testing and / or qualification by a classification society. Furthermore, the invention relates to remote testing of ships, and a combination of these two methods, ie remote acquisition of control system features. Furthermore, the present invention provides a system for remote control testing and ship simulation. [0002] A control system can generally be thought of as a system that provides control signals to a physical process and receives measurement data from equipment or a physical process, or possibly from other physical processes. Measurement data and algorithms are used to calculate control signals so that the physical system responds as desired. If the physical process is a motoring ship, then the control system can receive measurements in the form of the ship's position, heading, and speed, and can thus compute pro...

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Problems solved by technology

This U.S. patent does not discuss issues related to dynamic positioning of vessels in drilling operations or other forms of fixed-point operations. This patent does not mention the use of cranes, navigation devices connected to underwater equipment, and hydroacoustic positioning equipment. integration, problems related to ballast, and does not take into account the impact of sea waves

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