Analysis of the Vibrissa Parametric Resonance Causing a Signal Amplification during Whisking Behaviour  

作　　者：Tatiana Volkova Igor Zeidis Hartmut Witte Manuela Schmidt Klaus Zimmermann 

机构地区：[1]Technische Universiat Ilmenau, Technical Mechanics Group, 98693 Max-Planck-Ring 12, Ilmenau, Germany [2]Technische Universitat Ilmenau, Biomechatronics Group, 98693 Max-Planck-Ring 12, Ilmenau, Germany [3]Friedrich-Schiller-Universitat Jena, Institute of Systematic Zoology and Evolutionary Biology with Phyletic Museum, 07743 Erbertstrafle 1, Jena, Germany

出　　处：《Journal of Bionic Engineering》2016年第2期312-323,共12页仿生工程学报（英文版）

摘　　要：The paper deals with the mechanical vibrational motion ofvibrissae during natural exploratory behaviour of mammals. The theoretical analysis is based on a mechanical model of a cylindrical beam with circular natural configuration under an applied periodic force at the tip, which corresponds to the surface roughness of an investigated object. The equation of motion of the beam is studied using the Euler-Bemoulli beam theory and asymptotic methods of mechanics. It is shown that from the me- chanical point of view the phenomenon of parametric resonance of the vibrissa is possible. It means that the amplitude of forced vibrations of a vibrissa increases exponentially with time, if it is stimulated within a specific resonance frequency range, which depends on biomechanical parameters of the vibrissa. The most intense parametric resonance occurs, when the excitation frequency is close to the doubled natural frequency of free vibrations. Thus, it may be used to distinguish and amplify specific periodic components of a complex roughness profile during texture discrimination.The paper deals with the mechanical vibrational motion ofvibrissae during natural exploratory behaviour of mammals. The theoretical analysis is based on a mechanical model of a cylindrical beam with circular natural configuration under an applied periodic force at the tip, which corresponds to the surface roughness of an investigated object. The equation of motion of the beam is studied using the Euler-Bemoulli beam theory and asymptotic methods of mechanics. It is shown that from the me- chanical point of view the phenomenon of parametric resonance of the vibrissa is possible. It means that the amplitude of forced vibrations of a vibrissa increases exponentially with time, if it is stimulated within a specific resonance frequency range, which depends on biomechanical parameters of the vibrissa. The most intense parametric resonance occurs, when the excitation frequency is close to the doubled natural frequency of free vibrations. Thus, it may be used to distinguish and amplify specific periodic components of a complex roughness profile during texture discrimination.

关 键 词：VIBRISSA whisking VIBRATION tactile sensor beam theory parametric resonance 

分 类 号：O322[理学—一般力学与力学基础] TN722[理学—力学]