Research On Optimal Sensor Placement In Dynamic Test And Its Implementation

The selection of sensor locations is one of the key factors affecting results precision inthe dynamic test. Along with wide usage of dynamic testing technology in engineeringanalysis, the precision of test results is highly demanded, and sensor configuration is nowarousing more and more interest. So, how to choose the optimal sensor arrangements toobtain the most complete modal information is worthy of further study.To start with，this thesis clarified the significance and the present situation aboutoptimal sensor placement, described the foundation of the mathematic model, discussed theadvantages and limitations of several traditional algorithms, introduced the mainstreamevaluation criteria for evaluating sensor configuration program feasible.Secondly, based on the feature of those traditional algorithms and evaluation criteria,this paper presented a new optimal placement algorithm. This algorithm considered theimpact of modal kinetic energy, eliminated the clusters of sensors, and guaranteed asindependent as possible between the test modes. The final results indicated that thearrangement through the new optimal method not only can retain the integrity of the targetmode shapes, but guaranteed the cross-orthogonality between the target modes, which wasmore reasonable in ranking the sensor locations.Secondly, based on the requirement of implementing the optimal sensor placementalgorithm, a testing and post-processing system was designed and developed with theframework provided by MFC and the graphics rendering and interaction techniques ofHOOPS. Meanwhile, three crucial techniques of the system were investigated and solved.Finally, the functions of the auxiliary testing system was tested through examples, andthe test results show that the desired functions of this system had been realized and basicallycorrespond to actual needs.