Research On The Technology Of Piezoelectric Vibration Control And Its Application On Vehicle Door

Research on the Technology of Piezoelectric Vibration Control and its Application on Vehicle DoorLow-frequency vibration exists in the car’s travelling, which can generate vehicle parts’ damaged, bodybump and noise, that influences driving and sitting comfort. As the important influence to the car room,body structures vibration control is coming to be a key problem in modern vehicle technology.To solve the problem of body structure vibration, this paper use piezoelectric materials as actuators tocontrol structure vibration, and present the research of body thin structure active vibration controltechnology. To apply the piezoelectric characters, it can be used as sensors to sense the structure vibrationand as actuators to output suppress force to control the vibration.In this paper, it has researched the model of controlled object, the distribution type of sensor/actuators,the control method, the simulation of control system and the experiment application. As the features ofnon-linear, time-varying and complexity, the body thin structure has been simplified into rectangular thinplate structure. When building its mathematic model, the accuracy and practical applicability should beconsidered. So, in this paper, it apply the laminated rectangular thin plate theory and piezoelectric theory tobuild the system’s state-space function, and simulate the system while some exterior distraction to researchthe rule of thin-walled structures’ vibration and control methods’ adjustment. To gain an accurate model ofthe whole system, the neural network has been applied.Comparing with traditional vibration control technology, the advantage of piezoelectric vibration controlmethod is that, piezoelectric materials have low appended quality and varying distribution type. It can use asmall amount of piezoelectric element to control structure vibration. So, the research of sensor/actuatordistribution type has been an important problem. In this paper, it applies the modal strain theory as theaccordance of sensor/actuator distribution, build the FEM model of the thin-walled structure and the bodystructure and conducts modal analysis, then design the actuators’ shape, dimension and location due to thedistribution of the maximum modal strain energy. Then, it applies sensitivity approach method ofprobability finite element technology to check its reliability.In this paper, it has researched PID, NNPID and fuzzy control method, and approaches the methoddesign, parameters adjustment and so on. And it conducts simulation research in the matlab/simulink andsummarize the features, law and applicability of every control method. To check the stability androbustness of the control system, vary of drive signals and disturb signals has been applied in the simulation.In the end, it conducts experiment to check and approach the distribution type, control method designand the vehicle door. An experiment platform and a multi-input/output vibration test/control system hasbeen set up based LabVIEW. The experiment results indicate that, fuzzy control method and thesensor/actuator designed in this paper have a certain degree of vibration suppression effect to the bodythin-walled structures.