During the full-scale static loading test of wind turbine blades, due to the cross-link coupling phenomenon between the traction forces at each loading node on the blade, this characteristic has given rise to the loading force oscillate up and down during the test, which decelerated the control accuracy of multi-point static loading of the blade. On the basis of analyzing the coupling characteristics of the blades, a Beetle Antennae Search algorithm that integrating the idea of random flight at the local optimal solution was proposed, and it was applied to the PID parameter tuning link in the multi-node static loading test for system decoupling control. A four-point static loading coupled simulation model was established to verify the performance and control effect of the algorithm. The field experimental results demonstrated that the loading force curves of the four nodes in the test keep coordinated changes, the process error was less than ±1 kN, and the full load holding stage error was less than 0.5%. The algorithm has strong robustness and fast response speed, it effectively reduces the cross-coupling effect of each node, indicating the newly algorithm meets the requirements of coordinated control between traction forces during the full-scale static blade loading process, and the finding can provide a sufficient reference to stable loading of the blade static load test.
Key words
wind turbine blades /
force control /
PID controller /
static loading
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