Based on method of imprecision and adopting over all preference aggregation function, the three uncertainties, namelyrandom, fuzzy and unknown, which affect means and fluctuation of the system performance, would be taken into account for improving the traditional robust designs linear weighted sum method 根據(jù)不精確法,采用整體偏好聚合函數(shù),將隨機(jī)、模糊、未確知三種不確定性對(duì)系統(tǒng)性能均值和波動(dòng)性的影響綜合起來(lái)考慮,改善了傳統(tǒng)穩(wěn)健設(shè)計(jì)的線(xiàn)性加權(quán)和法的缺陷。