SUMMARY This paper presents a soft robot which can imitate the crawling locomotion of an earthworm. Locomotion be achieved by expanding and contracting body that is made flexible material. A link earthworm-like combined with three modules, multi-cavity multiple links. The links are fabricated silicone in three-dimensional printed customized molds. Experiments on single module, two-links, three-links show move bend condition modules extension contraction specified gait. development shows...

Angular acceleration is an important parameter for status monitoring and fault diagnosis of rotary machinery. Therefore, we developed a novel permanent magnetic angular sensor, which without rotation angle limitations could directly measure the instantaneous rotating system. The sensor rotor only needs to be coaxially connected with system, enables convenient installation. For cup structure rotor, it has relatively small rotational inertia. Due unique mechanical output signal can directed...

An angular acceleration sensor can be used for the dynamic analysis of human and joint motions. In this paper, an with novel structure based on principle electromagnetic induction is designed. The method involves construction a constant magnetic field by excitation windings sensor, cup-shaped rotor that cut field. output generate electromotive force, which directly proportional to through coupling when has rotational acceleration. mechanical working circuit are described. properties...

Fishes can avoid colliding with obstacles and track baits depending on the lateral distributed sense nodes which pressure variances of surrounding flow field. Fish often uses lateral-line system as their only means for navigation, especially under poor visual conditions. This sensing mechanism provides a new perspective researchers engineers to build such that could be applied control near field navigation underwater robots vehicles. In this article, pressure-sensing-based is proposed, 10...

Acoustically-excited bubble dynamics is the foundation of pipeline detection based on acoustic technology. Due to existence multiple bubbles in flow, Bjerknes forces among arbitrary under excitation may enforce bubble-bubble interaction and then change features dynamics. Based traditional free bubble’s Rayleigh-Plesset (R-P) model, this paper tries establish model consideration second force distribution axial direction. Meanwhile, influence finite wave speed compressible fluid considered....

According to the basis measurement problem of rotating machinery system in tangential vibration at present, this article presented 3 types structure permanent magnet (angular) acceleration sensor, and on introducing operating principle also analyzed sensor error introduced thinking characteristics parameter normalization. Because is based electromagnetic induction, it only sensitive rotation or angle acceleration. Moreover, simple structure, convenient use different which can meet...

This paper presents an ocean current roaming underwater robot combined with drive power generation and solar electrical energy generation. It will realize long-distance autonomous operational test which can meet the needs of detection has wide application prospect. To simulate analyze flow field robot, computational fluid dynamics method is used in this paper. Analysis showed that design model feasible advantageous. Besides control system designed introduced.

For shaft angular acceleration is the key to rotary system state inspection and fault analysis, two new sensors based on principle of electromagnetic induction are presented. When component exist in system, this output form induced potential through coupling. The voltage sensor can reflect changes mechanical according experiment. errors actual working condition analysed, a calibration method presented, which affords technical support for popularization application sensor.

A new type of glaze spray manipulator is studied with a three-dimensional entity modal. The dynamic characteristics its structure have been analysis by finite element method. first ten other modes vibration and their natural frequencies were obtained. It found out that the frequency peak appears at 10Hz max deformation occurs in sixth order mode observation end gun on manipulator. Furthermore, an improvement provided to reinforce stiffness thickness rotation support manipulator’s wrist (the...

Open-front press is one of the dominating equipment for punch forming. Body frame primary loadbearing part this machine, and its rigidity intensity have great influence on working performance. In order to optimize structure body shorten product development cycle, finite element analysis, which an effective technique in CAE, used investigate frame’s deformation stress distribution presented work. By taking JC21-160, a representative type open-front press, as analysis object, whole procedures...