Study on Hybrid Test Control System Based on MATLAB-STM32

Hybrid test is a new seismic test method combining numerical simulation with physical test. It is an advanced test method to evaluate the performance of nonlinear structures and systems. This paper proposes a novel hybrid test control system based on MATLAB-STM32. The system uses the STM32 microcontroller as the main controller and electrodynamic vibrator as excitation source of system. Furthermore, a complete set of hybrid test control system which includes physical hardware test and numerical software simulation is established by using MATLAB-STM32 communication technology, PID control method, displacement sensors, force sensors, etc. It provides a test platform for nonlinear test structures, components that are difficult to model, or components that require performance testing. This system realizes the function of real-time two-way communication between MATLAB and STM32 microcontroller. It uses the finite element software OpenSees to establish the numerical substructure, which solves the problem of the collaborative work between the numerical simulation test and the physical test of the experimental substructure, and can simulate the hybrid dynamic seismic test of the damping structure. To test the control performance of the designed system, this paper selects the viscoelastic dampers as the test substructure, and the performance detection and test analysis are completed for the hybrid test of single-layer frame structure with a viscoelastic damper. The test results show that the data communication between the upper and lower computers is stable and the whole control system performs well on both dynamic and static behaviors.