三平動(dòng)并聯(lián)機(jī)構(gòu)傳動(dòng)動(dòng)力學(xué)和雙軸同步控制研究
[Abstract]:The kinematic branching chain of 3-(2SPS) 3-parallel mechanism is a parallel rod driven by three synchronously. The precision and dynamic performance of synchronous control are the core to ensure the performance of the mechanism. In order to solve this problem, a hybrid synchronous control scheme combining cross coupling control and fuzzy PID control algorithm is proposed and studied in detail. The main research contents are as follows: according to the structure characteristics and structural parameters of the mechanism, the position equation of the three translational motions of the parallel mechanism is constructed. This paper analyzes and compares the sixth order inverse Jacobian matrix with the synchronization error of the third order inverse Jacobian matrix and the branching chain, constructs the transfer function of the branch chain driving system, and analyzes its stability and error problem. The main factors influencing the system error are determined, and the controller of the single drive system is constructed based on the feedforward method based on the PID principle, and the controller of the two-bar synchronous drive system adopts the combination of cross-coupling control and fuzzy PID control algorithm. The simulation experiments under different conditions are carried out, and the control effect of the controller is analyzed, and the experimental platform for synchronous control of two motors is established, and the experimental scheme of the control system is designed, which is based on the experimental platform. The hardware and software are designed respectively. The hardware includes the design and debugging of DSP controller schematic diagram and PCB, the construction of control system and the connection of motor driving module, photoelectric encoder detection module and potentiometer module. The specific motion trajectory is constructed, and the synchronization control algorithm combining cross coupling control and fuzzy PID control is verified and analyzed experimentally. The zero crossing problem of counting registers in the feedback process of the system is analyzed. A simple and effective zero crossing algorithm is designed. The research results show that the combined control method of cross coupling control and fuzzy control algorithm can ensure the control requirement well and the precision is high. It provides the basis for the engineering application of the parallel mechanism with double rod synchronous drive.
【學(xué)位授予單位】:南京理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2012
【分類號(hào)】:TH112;TH113
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