Research On Automatic Non-Magnetic Three-Axis Rotary Table

Three-axis rotary table is a simulation equipment which can turn in three dimensions. It is used for simulating the movement of a missile,fish torpedo and self-guided aero craft,and testing the navigation system, control system of them. Therefore,it is such a pivotal equipment for testing the performance of a missile,fish torpedo and self-guided aero-craft that playing a momentous part in research and development on these productsThe automatic three-axis rotary table researched on this paper is overall non-magnetic. The distortion of the magnetic field caused by the rotary table is not more than 7nT, when it works in a magnetic field. It can achieve 360-degree continuous rotary or cyclical swing according to the input law and accurately stop in a designated location. The automatic non-magnetic three-axis rotary table is a special equipment for emulating, testing and identifying the performance of the fish torpedo sensor in a uniform magnetic fieldAn in-depth research and analysis has been done on the automatic non-magnetic three-axis rotary table in this paper.First of all, the author pointed out the key points in design of the rotary table, and detailedly analyzed, calculated the non-magnetic requirements of the table by some magnetic theory. Then, the author summarized some principles for designing a non-magnetic mechanical structure and raised a new non-magnetic long-distance mechanical -hydraulic drive and servo control plan according to the working environment requirements ,precision requirements and the principles,The author also comprehensively presented the overall plan of the automatic three-axis rotary table and its control system, hydraulic system principle. Systematically described the method how to achieve, introduced the mechanical structure of each parts in detailIn the designing process, a series of measures has been taken to limit the table's magnetism strictly, such as: used non-magnetic material for manufacturing, employed a non-magnetic hydraulic conductive rotary joint and non-magnetic electricity conductive rotary joint, designed a new non-magnetic mechanism hydraulic valve, used a non-magnetic angular displacement grating for measuring.Finally, the author calculated the distortion caused by rotary table in a uniform magnetic field, and computed the stiffness and strength of the octagon frame and U-shaped frame by COSMOS Works and analyzed all precision of the rotary table.