Measurement and control system design and texture anti-friction test of reciprocating friction tester based on compliant mechanism

To facilitate the in-depth study of the tribological behavior of texture friction pairs in the process of reciprocating friction. The micro-displacement deformation output model of compliant mechanism is deduced using a new method for indirectly measuring friction coefficient through micro-deformation of double parallel four-bar compliant mechanism. Then, the whole structure of the testing machine is designed, the data acquisition hardware platform of the testing machine is built, and the measurement and control and signal processing system based on virtual instrument technology is developed. To realize the real-time acquisition and synchronous display of tribological measurement data such as friction coefficient, load and speed. Finally, texture friction pairs with diameters of 800 μm, 900 μm, 1000 μm and 1200 μm are processed, and texture friction tests under different loads (50N-250N) and rotational speeds (10r/min-50r/min) are carried out on the testing machine. The test results show that the friction coefficient increases with the increase of rotational speed and decreases with the increase of load, The test results accord with the tribological laws, which are consistent with the law of klageriski test curve under small load. Stable performance of the tester with good credibility, which lays the foundation for the subsequent development of real-time dynamic measurement of the friction coefficient during the reciprocal cycle.