Manipulators with cams as the core components play an important role in industry. According to the designed end trajectory of the cam manipulator and the given necessary structural parameters, the cam profile can be inversely obtained. It is noteworthy that the cam profile is designed based on the theoretical correct size of all structural parameters. The size of the structural parameters of the parts changes within the given tolerance range during machining, so the manufacturing error of the actual structural parameters will inevitably lead to errors between the actual end track and the ideal track. In order to study the influence of structural parameter error on the end track accuracy, the cam profile curve is designed by analytical method, and the specific structural parameters that affect the end track accuracy are obtained through theoretical derivation. The theoretical analysis and provided a basis for strictly controlling the sensitive error in actual processing.
The zero-stiffness structure has excellent vibration attenuation performance. In this paper, a new type of zero-stiffness vibration isolator is designed, and the vibration isolation effect is simulated and analyzed. Furthermore, the zero-stiffness isolator is applied to the McPherson suspension, and the improved McPherson suspension model is obtained. Under the excitation of the bump road and C-level Road, the performance of the improved suspension is simulated, and the responses of the vehicle body vertical acceleration and suspension deflection are analyzed, and compared with that of the original suspension. The results show that, under two cases, the vertical acceleration of the improved suspension is reduced by 92.5% and 65.4% compared with the original suspension respectively, and the stability speed is also greatly improved.
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