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Ship motion control , it is necessary to understand the state of motion of the ship , in order to control the ship movement , which proposed the development of the six degrees of freedom motion tester , the tester can test the movement of the ship line acceleration , angular acceleration , linear velocity , angular velocity and azimuth, roll angle , pitch angle , the data basis for ship motion control . In order to ensure test accuracy , the present system uses 15 sensors , one to one direct measurement of the motion state of the respective physical quantity . This paper introduces the principle and the basic characteristics of the sensor , and in accordance with the requirements of the system performance indicators , select the desired sensor , the design of the signal conditioning circuit , the signal zero and zoom , to meet the microcontroller input signal the voltage range of requirements. Six degrees of freedom motion tester lower test device and the host computer testing software . Lower machine selects SCM W77E58 system main chip control complete data acquisition , data processing, data storage , and communicate with the host computer , the system is set via an external button two modes of operation , data acquisition mode and data transfer mode . When working in data acquisition mode , the system detected by a sensor data and data stored in external data memory , and also through the RS232 serial port to send data to the host computer detected ; work in data transfer mode , the system does not detect data , only the external data memory data sent via RS232 serial port to the host computer . In order to meet the different needs of the system also has an analog output interface , real-time analog voltage output of each exercise . The host computer testing software developed using C Builder , the test software to receive the the lower machine data is displayed in real time in the form of the curve , the curve either a two-dimensional plane , three-dimensional display , can also be a concern to the user a class or a certain physical quantity displayed separately ; calibration sensor to achieve a dynamic parameter adjustment of the sensor ; the test software can automatically record detected data in file form . Finally, the experimental analysis , validation system to better meet the design requirements .
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