In this paper, the thermal analysis of a membrane antenna structure is performed, and then, rigid-flexible coupling dynamic modeling control membrane-antenna-satellite system are studied with stress considered. The model derived based on finite element method by discretizing into 1D 2D elements. Considering stress, vibration modes obtained, hybrid coordinate method. To reduce caused attitude ma...

In the normal mammalian ear, sound vibrates the eardrum, causing the tiny bones of the middle ear to vibrate, transferring the vibration to the inner ear fluids. The vibration propagates from the base of the cochlea to its apex along the cochlear partition. As essential as this concept is to the theory of hearing, the waveform of cochlear partition vibration has yet to be measured in vivo. Here...

A salient characteristic of most auditory systems is their capacity to analyse the frequency of sound. Little is known about how such analysis is performed across the diversity of auditory systems found in animals, and especially in insects. In locusts, frequency analysis is primarily mechanical, based on vibrational waves travelling across the tympanal membrane. Different acoustic frequencies ...

Limited by the effective launch capacity of a rocket, deployable antenna is very important in design spaceborne array. Compared to traditional antenna, flexible coilable array has higher surface precision and better vibration control therefore more suitable for high frequency communication. In order minimize weight satellite reduce cost its launch, guideline geometry parameters crucial. Existin...

For successful performance of phonosurgery, it is most important to maintain the flexibility of the vocal fold. Unfortunately, however, there has been no direct effective method so far for assessing the flexibility of the vocal fold membrane. If the vocal fold surface showed any abnormal region where good vibration could not be observed, reduced flexibility was expected in this area. Hitherto, ...

This paper is concerned with active vibration reduction of a square isotropic plate, mounted rigidly along one edge to form a cantilever. Optimal placement of ten piezoelectric sensor/actuator pairs is investigated using a genetic algorithm to suppress the first six modes of vibration. A new objective function is developed based on modified Hinfinity to locate the sensor/actuator pairs. The pla...