Research On The Spring Mechanism And Realization Method Based On The Inertia Characteristics Of Piezoelectric Driving

The motion performance of jumping mechanism is related to its own structure,the jumping performance decreases with the increase of the total mass of the random body,so the jumping mechanism with small structure,easy to operate,strong adaptability and other characteristics has been paid attention to by scholars at home and abroad,and has made great progress.At present,the driving mode of most spring mechanisms is still the traditional driving mode,which makes more driving parts from the driving parts to the final realization of jumping.Therefore,it is difficult to realize miniaturization of the spring mechanism by highly integrating the driving parts,transmission parts and other parts in the traditional way.In order to make the motion of the spring mechanism efficient,flexible and easy to control,the driving mode of the spring mechanism with small structure is an important issue to be considered.Therefore,this article put forward the driving mode of piezoelectric driven inertial characteristics,and according to the characteristics of the piezoelectric driven inertial characteristics put forward the bounce configuration,the bouncing mechanism study of jumping machines,on this basis,we design a jumping machine based on piezoelectric driven inertial characteristics,through experimental tests verify the correctness of the driving mechanism inertial characteristics.Based on the analysis of the driving mode and overall structure size of the spring mechanism at home and abroad,this paper conducts an in-depth study on the existing problems of the spring mechanism from the following four aspects:Firstly,the inertial driving characteristics of piezoelectric actuator are studied.Based on the constitutive equation of piezoelectric actuator,the inertial driving characteristics of piezoelectric actuator are simulated and analyzed.The results show that the output displacement and inertia force of the piezoelectric actuator tend to rise with the increase of the cross-sectional area and height of the actuator.Secondly,the bounce mechanism based on piezoelectric inertia driving is studied.The energy storage and transformation mechanism of inertia block and spring in the spring configuration under the multi-period square wave are analyzed.The simulation analysis of the bounce mathematical model shows that the bounce height of the second driving signal is 17.5 ?m higher than that of the first one.Therefore,the bouncing configuration is driven by a multi-period square wave and can achieve a high jumping motion.Thirdly,the jumping mechanism based on piezoelectric inertia driving is studied.Based on the research of bounce configuration,a bounce mechanism driven by piezoelectric inertia is designed.By analyzing the dynamic model of the spring mechanism,it is found that when the spring height is 5 cm,the spring compression amount required is 0.92 mm,which can be realized through 2174 times of square wave driving.Finally,the bounce mechanism of piezoelectric inertia driving is experimentally studied.The experimental system was built to explore the influence of the driving signal and the size of the piezoelectric actuator on the inertial driving characteristics of the piezoelectric actuator.When the spring stiffness is 13 N/mm and the mass of the inertia block is 15 g,the maximum displacement of the inertia block in the bounce configuration is 52 ?m and 56.8 ?m respectively,which is consistent with the study of the bounce theory.Therefore,the jumping configuration designed according to the bounce mechanism can be realized by using the piezoelectric inertia characteristics,which provides a theoretical basis for the design of the jumping mechanism and a new idea for the driving mode of the mechanism.