Study On Synchronized Control Of Shaftless Driven Technology

Shaftless driven is a burgeoning, subject-bestraddled and synthesized technology, it's a combination of electric transmission, network communication, automatic control and mechanism technology. Shaftless driven is characterized by high precision, wide transmission ratio, predigested structure and flexibility. So mechanism transmission can be replaced by shiftless driven to realize exact transmission. Shaftless driven technology plays an important role and has capacious application foreground in printing machine, mechanical processing, large synchronized mills and other fields that need synchronized transmission.The development, automatic control and application of shaftless driven technology were discussed comprehensively in this dissertation, especially the synchronized strategy. It includes such contents as follows:The structure, advantage and disadvantage, transmission precision of two synchronized modes: master-slaver mode based on variable-value control and parallel mode based on fixed-value control were analyzed in detail. The similarities and differences were point out by comparison. Master-slaver mode requires the servo system to have good servoing performance, and be able to adjust the output of the slaver shaft based on the change of the master shaft dely and exactly. And that parallel mode requires the servo system to have good speed stability to ensure invariable output of speed. Many factors need to be considered synthesizedly to make appropriate choice, like transmission requirement, precision, economy and control ability.Aiming at the problems from synchronized control of shaftless driven, corresponding resolvent was put forward. Compensation method using the difference between master speed and slaver speed was adopted to resolve the asynchronism. The simulation result indicated that there is great increase in servoing performance and disturbance-resisting performance of synchronized control with compensation. Besides, dynamic compensation method—feedforward was discussed to resolve the lag of position synchronization, and the validity of feedforward compensation was proved based on the invariability theory.Shaftless driven system is a servo system with multi-variable synchronization.