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针对双前桥转向机构,应用稳健设计理论,将可靠性优化与稳健设计相结合,考虑设计变量的微小变化对转向机构运动精度的影响,以1、2轴转向梯形机构转角误差、转向摇臂机构转角误差,转向机构运动精度的可靠性灵敏度为优化目标,以转向机构中16个结构参数为设计变量,以各机构转角误差及尺寸限制等为约束条件,建立双前桥转向机构可靠性稳健优化数学模型。优化结果表明,在考虑设计、加工、装配误差对零件尺寸的影响的同时,运用可靠性稳健优化设计方法能有效保证转向机构的运动精度和可靠性。
For the dual front axle steering mechanism, the robust design theory is applied to combine the reliability optimization with the robust design. Considering the influence of small variations of the design variables on the movement accuracy of the steering mechanism, the steering error of the steering mechanism with 1 - The steering angle error of the steering mechanism and the reliability sensitivity of the steering mechanism are the optimization objectives. Taking the 16 structural parameters of the steering mechanism as the design variables, the steering angle error and the size limit of each mechanism as the constraints, the reliability of the steering mechanism of the dual front axle is established Optimize the mathematical model. The optimization results show that the reliability and robust optimization design method can effectively ensure the steering accuracy and reliability of the steering mechanism while considering the influence of design, machining and assembly errors on the part size.