回頭角速度Z試験法とその実船および自航模型船への適用

概要

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The zig-zag test technique is now widely used to assess steering quality of ships. The rudder movement at the test can be interpreted as a bang-bang control against yaw angle deviation. In the present paper a new zig-zag test that employs a bang-bang control against yaw-rate, instead of yaw angle, is proposed. This modification makes it possible to set up the limit-cycle in the sustained zig-zag motion of any amplitude in a few minutes and thus gives a good means of definitive manoeuvres particularly convenient for marginally stable and unstable ships. The procedure of the new technique and some discussions about it are given, including a comparative study on the convensional zig-zag test and the new one. Some actual results of this technique with a car-ferry, a few super-tankers, both in full size, and a tanker model are also given.
社団法人日本船舶海洋工学会の論文
1973-06-30