Saturday, October 25, 2014

 

 



Soy un nuevo usuario

Olvidé mi contraseña

Entrada usuarios

Lógica Matemáticas Astronomía y Astrofísica Física Química Ciencias de la Vida
Ciencias de la Tierra y Espacio Ciencias Agrarias Ciencias Médicas Ciencias Tecnológicas Antropología Demografía
Ciencias Económicas Geografía Historia Ciencias Jurídicas y Derecho Lingüística Pedagogía
Ciencia Política Psicología Artes y Letras Sociología Ética Filosofía


An efficient drive, sensing, and actuation system using PZT stack actuator cells

1) La descarga del recurso depende de la página de origen
2) Para poder descargar el recurso, es necesario ser usuario
    registrado en Universia


  Descargar recurso

Detalles del recurso

Pertenece a: DSpace at MIT  

Descripción: The PZT cellular actuator developed in the MIT d'Arbeloff Laboratory utilizes small-strain, high-force PZT stack actuators in a mechanical flexure system to produce a larger-strain, lower-force actuator useful in robotic systems. Many functionalities for these cellular actuators are developed which can have great impact on robotic systems and actuation itself. After initial exploration into other possible circuitry, a circuit is designed to recovery unused energy for the PZT cells. The circuit design is formed around a proposed method of distributed actuation using PZT cells which imposes that different PZT cells will be activated during different periods such that the charge from some cells can be transferred to others. If the application allows actuation which can conform to this criteria, the developed circuit can be used which, without optimization, can save ~41% of the energy used to drive the actuators with a theoretical upper limit on energy efficiency of 100%. A dynamic system consisting of multiple PZT actuators driving a linear gear is analyzed and simulated which can achieve a no load speed 2.4 m/s with minimal actuators. Then, the two-way transforming properties of PZT stack actuators are utilized to allow dual sensing and actuation. This method uses an inactive PZT cell as a sensor. With no additional sensors, a pendulum system driven by antagonistic groups of PZT cells is shown to find its own resonance with no system model. These functionalities of charge recovery, distributed actuation, and dual sensing and actuation set the PZT cellular actuator as an important contribution to robotic actuation and begin to illuminate the possible impacts of the concept. The design and analysis described reveals many possibilities for future applications and developments using the PZT cellular actuator in the fields of actuation and robotics.

Autor(es): Barragán, Patrick R - 

Id.: 55228913

Idioma: eng  - 

Versión: 1.0

Estado: Final

Tipo:  82 p. - 

Palabras claveMechanical Engineering. - 

Tipo de recurso: Thesis  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Formatos:  82 p. - 

Requerimientos técnicos:  Browser: Any - 

Fecha de contribución: 29-abr-2012

Contacto:

Localización:
* 785723345


Otros recursos del mismo autor(es)

  1. Exciting youth about science and engineering : the Stirling Engine class Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.

Otros recursos de la misma colección

  1. Neural network architectures for Prepositional Phrase attachment disambiguation This thesis addresses the problem of Prepositional Phrase (PP) attachment disambiguation, a key chal...
  2. A delay-constrained cross-layer model using network coding Traditionally, most packet-switched networks have only one wireless hop: the link between the end us...
  3. Better embeddings for Planar Earth-Mover Distance over sparse sets We consider the problem of constructing low-distortion embeddings of the Planar Earth-Mover Distance...
  4. The structure of promises in quantum speedups It has long been known that in the usual black-box model, one cannot get super-polynomial quantum sp...
  5. (OR)² : operations research applied to operating room supply chain Massachusetts General Hospital (MGH) is ranked as the top hospital in New England and second nation-...

Valoración de los usuarios

No hay ninguna valoración para este recurso.Sea el primero en valorar este recurso.
 

Busque un recurso