Abstract
Body static stiffness is an important index to evaluate the vehicle performance, and test is a main evaluation method for the static stiffness. Accordance with the existed problem of static stiffness measurement, we developed a bending and torsion stiffness measurement system. The system includes loading device, test bench, displacement sensor and fixture, data-acquisition system and software. The software communicates with slave computer (PLC) through serial interface to make data process and store. It also could do stiffness analysis according to relative methods. Practical application shows that the system could measure the static stiffness accurately.
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