Abstract：A parameter design method for variable time-delay vibration system was proposed to ensure the stability of bulk machining system. In this system the materials accumulation affects production speed and processing unit weight, the material impacts the processing unit after free falling, the settlement displacement signal of the processing unit is used to complete the negative feedback regulation of the material supply speed and a variable time delay feedback link is formed. Firstly, the static equilibrium and stability of the system was studied according to the dynamic differential equation of the system. Then, the parameters range of stiffness coefficient and damping coefficient which can ensure the stability of the system was solved by using the condition of Hopf bifurcation. Finally, the theoretical analysis was verified with Simulink simulation, and the selected parameters make the system have certain anti-interference ability. Using the eigenvalue characteristics of bifurcation points to determine the selectable range of parameters could provide a reference method for the parameter design of variable time-delay systems.
陈宁，张红兵，李万祥，李雄兵. 变时滞反馈散料加工系统的参数设计[J]. 振动与冲击, 2022, 41(6): 229-235.
CHEN Ning， ZHANG Hongbing， LI Wanxiang， LI Xiongbing. Parameter design of bulk material machining system with variable delay feedback. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(6): 229-235.
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