A triaxial accelerometer monkey algorithm for optimal sensor placement in structural health monitoring

作者：Jia, Jingqing^*; Feng, Shuo; Liu, Wei

来源：Measurement Science and Technology, 2015, 26(6): 065104.

DOI：10.1088/0957-0233/26/6/065104

• structural health monitoring
• optimal sensor placement
• monkey algorithm
• triaxial accelerometer

Optimal sensor placement (OSP) technique is a vital part of the field of structural health monitoring (SHM). Triaxial accelerometers have been widely used in the SHM of large-scale structures in recent years. Triaxial accelerometers must be placed in such a way that all of the important dynamic information is obtained. At the same time, the sensor configuration must be optimal, so that the test resources are conserved. The recommended practice is to select proper degrees of freedom (DOF) based upon several criteria and the triaxial accelerometers are placed at the nodes corresponding to these DOFs. This results in non-optimal placement of many accelerometers. A 'triaxial accelerometer monkey algorithm' (TAMA) is presented in this paper to solve OSP problems of triaxial accelerometers. The EFI3 measurement theory is modified and involved in the objective function to make it more adaptable in the OSP technique of triaxial accelerometers. A method of calculating the threshold value based on probability theory is proposed to improve the healthy rate of monkeys in a troop generation process. Meanwhile, the processes of harmony ladder climb and scanning watch jump are proposed and given in detail. Finally, Xinghai NO. 1 Bridge in Dalian is implemented to demonstrate the effectiveness of TAMA. The final results obtained by TAMA are compared with those of the original monkey algorithm and EFI3 measurement, which show that TAMA can improve computational efficiency and get a better sensor configuration.

• 出版日期2015-6
• 单位大连理工大学; 海岸和近海工程国家重点实验室