Development of Non-Contact Control/Measurement System for Free-sailing Model Ships

点击翻译按钮获取中文摘要

A New non-contact control/measurement system for free-sailing model ships is developed, which will be applicable for various free-sailing tests. It was difficult to carry out by conventional radio-control system. The system is consists of a micro-computer system installed in a model ship, which is communicated with a personal computer on land via a set of wireless modems. The personal computer will order the micro-computer to control and measure through A/D, D/A and DIO boards, which are connected with a propeller, a rudder and sensors.Another system is position measurement system using two VIDEO cameras, utilizing image processing and ordinate transformation of a point light on a model ship. In cases where displacement of a model ship is insufficient for instruments, this system will be a merit. Six degree of freedom measurement is possible, if this system will be combined with the gyro signal measured by the nonーcontact control/measurement system.The system is applied to the following experiments with great success.1) Capsizing tests in regular following seas in a towing tank (where water-proofness, impact force torelance, six-degree-of-freedom measurement capability and the fundamental system check were done.)2) Capsizing tests in regular/irregular following seas in an outdoor model basin (where outdoor capability of digital communication was done ; position measurement using VIDEO cameras was not done here.)3) Manoeuvrability tests in still water in an outdoor model basin (where position measurement using VIDEO cameras was done.)