منابع مشابه
Magnetostrictive Actuators Compared to Piezoelectric Actuators
Magnetostriction occurs in the most ferromagnetic materials and leads to many effects [1,2]. The most useful one to refer to is the Joule effect. It is responsible for the expansion (positive magnetostriction) or the contraction (negative) of a rod subjected to a longitudinal static magnetic field. In a given material, this magnetostrain is quadratic and occurs always in the same direction what...
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New pneumatic actuators developed in the author's laboratory will be presented with their applications to new mechatronics. Examples of them are a pneumatic rubber actuator for compliant robots, a micro pneumatic tube actuator assisting the colonscope insertion, a pneumatic stepping motor with high torque and resolution, a pneumatic drive bicycle, an intelligent pneumatic cylinder which has enc...
متن کاملModeling Piezoelectric Actuators
The piezoelectric actuator (PEA) is a well-known device for managing extremely small displacements in the range from 10 pm (1 pm = 10 12 m) to 100 m. When developing a control system for a piezo-actuated positioning mechanism, the actuator dynamics have to be taken into account. An electromechanical piezo model, based on physical principles, is presented in this paper. In this model, a first-or...
متن کاملGraphene-based actuators.
The development of new mechanical actuators that convert external stimuli such as thermal, light, electrical, or chemical energy to mechanical energy depends on the development of new materials. Reversible mechanical actuators based on carbon nanotubes (CNTs) and hydrogel polymers have suggested applications in robotics, sensors, mechanical instruments, microscopy tips, switches, and memory chi...
متن کاملNematic elastomer actuators
In this seminar, the liquid crystal elastomers (LCEs) and their building blocks – liquid crystals and polymers are presented. The specific rod-like molecular shape of liquid crystals forces LCEs to form a special molecular distribution of the underlying polymer network. This allows them expand up to 400 % with temperature, which could be used in applications. The physics of this spontaneous dis...
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ژورنال
عنوان ژورنال: Journal of the Robotics Society of Japan
سال: 1997
ISSN: 0289-1824,1884-7145
DOI: 10.7210/jrsj.15.342