Ocean towing linear array high-precision course heading control method

Abstract

The present invention discloses a high-precision heading control method for an oceanic towed cable array. The high-precision heading control method has the following steps: a group of cable spreaders and acoustic towing bodies are intervallically mounted on cables; a console on board is communicated with the spreaders by half duplex and rollcalling and inquiring; when the towed cable array is just laid into the water, the spreading alar plates of all the cable spreaders are set at a zero angle of attack by default, all the cable spreaders on a reference cable start to measure respective heading angles, and the spreaders and the console on board realize self-closed loop heading angle adjustment; afterwards, the cable spreaders are always adjusted in a certain cycle according to an interval measured by the acoustic towing bodies and by comparing the interval with a set value, so that the interval between a node and the reference towed cable is maintained near to the set value. The high-precision heading control method has the following advantage: the high-precision heading control method can accurately control the heading angle of a towing system within the range between positive 0.5 degrees and negative 0.5 degrees, the control precision of the cable interval is better than positive 10m and negative 10m.

Description

technical field [0001] The invention relates to a horizontal control method of an ocean towed array. Background technique [0002] For the towed array in the horizontal plane of the ocean towed system, in order to obtain a better measurement effect, it is generally used to install a spreader at the fixed end (the end near the stern) to generate a larger deployment force to drag each root of the towed array. The method of separating the cables at a certain interval in the horizontal plane can meet the requirements under better marine environmental conditions, but its disadvantage is that the anti-flow performance is poor, and the formation behind the spreader cannot be controlled. However, when the ocean towed system is towing in the water, it will deviate from its expected course or be in a curved state due to various reasons such as ocean currents and differences in the geometric shape of the towed cable. This curved shape will inevitably reduce the measurement accuracy of ...

AI Technical Summary

Problems solved by technology

[0002] For the towed array in the horizontal plane of the ocean towed system, in order to obtain a better measurement effect, it is generally used to install a spreader at the fixed end (the end near the stern) to generate a larger deployment force to drag each root of the towed array. The method of separating the cables at a certain distance in the horizontal plane can meet the requirements under better marine environmental conditions, but its disadvantage is that the anti-flow performance is poor, and the formation behind the spreader cannot be controlled.

However, when the ocean towed system is towing in the water, it will deviate from its expected course or be in a curved state due to various reasons such as ocean currents and differences in the geometric shape of the towed cable. This curved shape will inevitably reduce the measurement accuracy of the system. When multiple systems are towed in parallel, bent towing cables can also cause system components to get tangled, kinked, and damage equipment due to close proximity

At present, there is no technical solution to this problem in China