Impact Load Effects on Dynamic Behavior of High-Precision Mechanism with Clearance Joint

Generally, a clearance joint can cause contact–impact characteristics and nonlinear dynamic behavior of a mechanism, and the introduction of an external load would improve motion instability. The main concern in mechanism design is to obtain the dynamic response of a mechanism with clearance joints. In this study, a dynamic model of a high-precision mechanism is established. The contact characteristics of the clearance joints are described using the dissipative contact model and the Coulomb friction law. Meanwhile, an experiment platform for impact load and dynamic behavior for this mechanism is designed. And the impact load value is introduced into the dynamic model. Eventually, the influence of clearance characteristics and design parameters on the nonlinear response of the high-precision mechanism is analyzed using a case study.