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《China Mechanical Engineering》 2016-19
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Synchronous Control of Dual-drive System in Gantry-type Machine Tools Based on Disturbance Observer

Li Ping;Zhu Guoli;Gong Shihua;Yue Lan;Huazhong University of Science and Technology;  
According to the structure and motion characteristics of the double drive system in CNC gantry-type machine tools with moving beams,a mechanical coupling dynamic model of double drive system in the gantry-type machine tools was established based on Lagrange's equation.Combined with the dynamic model of transmission system and the three closed loop control structure of servo system,the double drive system model of gantry machine was obtained.In order to reduce the effects of asymmetric structure and eccentric load disturbance on the synchronization accuracy and improve the anti-interference of the system,a dual drive system synchronization control method was proposed based on DOB.Finally,the simulation analyses were carried on.The simulation results show that the synchronization performance of double drive system to improve in gantry-type machine tools is obviously improved after the disturbance compensation by disturbance observer.
【Fund】: 国家科技重大专项(2013ZX04013-011)
【CateGory Index】: TG659;TP273
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