用改进的粒子群算法对基于非对角MAC矩阵元素均值最小目标函数为目标函数，以简支梁前三阶模态振型为原始数据对简支梁进行传感器优化布置。(The objective function based on the average minimum objective function of the non-diagonal MAC matrix elements is studied by the improved particle swarm algorithm.)