模型船用航跡自画装置について

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The paper describes the new facillity which is used to trace the free running model ship at Mitaka No.1 Ship Experiment Basin, Ship Research Institute.The position of the model in the basin is measured by counting the travelling time of supersonic signals in water, which is transmitted at the bottom of the model at every one second and is received at two separate points on the shore, The two values of the distances are put into a mini-computor(4kW) and are converted into XY-coordinates. Then the position and the trajectory of the model is plotted on a digital XY-plotter and punched out on the paper tape on line. In order to obtain the position of rudder execute, beginning point of measurement and so on, some external signals can be taken in with the accuracy of 0,01 second. These points are plotted on the XY-plotter and punched out on the paper tape immediately after the "on line" plotting and punching out of the position of the models.After the above processes are finished, the mean speed and the course angle of the model can be calculated between two appointed times, which are decided and typed in by the operator referring the just plotted trajectory. Tunning characteristics such as advance, transfer, turning diameter and so on can be calculated later using the punched paper tape on a computer FACOM 270-20 at Ship Research Institute.The measurement can be continued for about 220 or 330 second, the difference of which depending on the included "on line" programs.
独立行政法人海上技術安全研究所の論文
1972-02-29

模型船用航跡自画装置について

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