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为使液压支架铰链四杆机构在采高区内具有近似直线轨迹,可利用连杆平面上的拐点性质综合这类四杆机构。以指定采高区内直线偏差最小为目标,以满足Grashof准则、杆长协调、角度限制等为约束条件,建立综合液压支架近似直线导向四杆机构的6参数约束优化模型。结合Deb约束处理可行性规则,应用差分进化(Differential Evolution,DE)算法求解该约束优化问题。给出综合实例,仿真结果表明,该方法是可行有效的。还比较了DE算法与另外3种智能算法求解该机构综合实例的优化性能。数值试验显示,DE算法的收敛速度、收敛精度和稳健性等性能指标优于3种对比算法。
In order to make the hydraulic support hinge four-bar mechanism have approximate straight-line trajectories in the mining area, the four-bar mechanism can be integrated by using the inflection point property on the connecting bar plane. In order to minimize the straight line deviation in the mining area, a 6-parameter constrained optimization model is established based on Grashof criterion, rod length coordination and angle limitation. Combining the feasibility rules of Deb constraint processing, the Differential Evolution (DE) algorithm is applied to solve the constrained optimization problem. A comprehensive example is given. The simulation results show that this method is feasible and effective. The DE algorithm and the other three intelligent algorithms are also compared to solve the optimization performance of the comprehensive example of the agency. Numerical experiments show that the convergence rate, convergence accuracy and robustness of DE algorithm are superior to those of the three contrast algorithms.