Research Of The V-shaped Groove Piezoelectric Stack Inertial Actuator

The piezoelectric inertia actuator arouses people's interest unceasingly in the various trades and occupations by its own unique merits,such as non-electromagnetism interference,convenient control,high displacement differentiate rate,good response characteristic,etc.Especially in recent years, along with the piezoelectric element's performances improved unceasingly, new structures, new forms of piezoelectric drive mechanisms emerged. The research area and application domain of piezoelectric actuator expanded quickly, piezoelectric inertia drive mechanism's application scope also expanded unceasingly.Funded by the National Natural Science Foundation Project"Theoretical And Experimental On New Micro Inertia Piezoelectric impact drive mechanism". Making use of the surface friction and piezoelectric materials of the inertial force changing orderly to form a new kind of micro-displacement principle .According to the inertia driving mechanism theory, used the method that symmetrical voltage signal actuate piezoelectric stack,designed inertia piezoelectric stack actuator based on V-shaped groove,researched the length of stride closed-loop-control system,and did relate tests. The main content of this dissertion is as follows:1.Researched the basic situation of the piezoelectric actuator, including its characteristics,application areas and piezoelectric inertia actuator's research present situation in domestic and foreign countries.Analysed the present situation of the control algorithm that used on the piezoelectric ceramics driver.Laid solid theoretical foundation for the design of inertia piezoelectric drive mechanism.2.Researched the piezoelectric stack element, including it's composition ,structure and so on.And analyzed the important characteristics of piezoelectric stack,such as hysteresis characteristic,nonlinear characteristic,peristalsis characteristic,stiffness characteristic,force characteristic and temperature characteristic,etc.Elaborated the movement theory of the piezoelectric inertia driving mechanism.Making use of the AE0505D16 piezoelectric stack which produced by Japanese TOKIN Corporation as the force source. Utilized symmetrical square wave signal actuate piezoelectric stack,through changing the vertical force that put on the mechanism,to change the friction.Cooperate the surface friction with the inertial force orderly to realize the driving mechanism's movement.Designed the hinge adjustment mechanism to adjust the piezoelectric stack's angle. and have analyzed the flexible hinge's distortion characteristic and the amount of deformity size with the finite element analysis Anasys software. Researched the measure then manufactured the hinge adjustment mechanism. Researched the types and charistaristics of the groove,choosed the V-shaped groove to design the inertia piezoelectric drive mechanism.Analysed the stress.which was carried on V shape groove.The analysis results indicated that V-shaped groove can increase the equivalent friction coefficient.The research of the basic knowledge laid solid theoretical basis for the design of the V-shaped groove piezoelectric stack inertial actuator.3.According to the driving theory of piezoelectric inertia driving mechanism, designed two kinds of piezoelectric inertia actuators .One is based on the 120 degree V shaped groove and the other is 90 degreeV shaped groove. Has studied the influence of V shape groove's angle to the actuator, as well as the force of inertia production, the friction force reconfiguration, and has carried on the movement analysis contrast to the driving mechanism.According to the design result, manufactured the samples of the V-shaped groove piezoelectric inertia driving mechanism, and has made the test of the key properties respectively. Has tested driving mechanism performance such as the velocity of movement, length of stride.has carried on the analysis to the test result. The experiment proved: the movement base-on-V shape-groove piezoelectric inertia driving mechanism to be steady, high resolution, and so on characteristics 4.Designed the length of stride feedback closed-loop control system, and the PID closed-loop control system. Has carried on the closed-loop control system experiment test as well as the PID closed-loop control system to test the actuator, make the test results contrast with the open-loop control system condition. The results indicate that the length of stride feedback closed-loop control system increased the length of stride's stability, has good control effect. Developed the fuzzy PID control system, made the online real-time adjustment to the PID parameters.5.Has given the full text's main conclusion, and will propose the forecast to present's research workThis article has designed the driving mechanism structural and the control system to conduct the research of the piezoelectric inertia actuator, will open the new way for the research of piezoelectric inertia driving mechanism,and will provide new model for the related domain's research work.