Impact of Electro-mechanical Properties of the Actuation Mechanism on the Peak Power and Energy Requirements of Active Foot Prostheses

2017 ◽  
Author(s):  
Mahdy Eslamy ◽  
Khalil Alipour
Keyword(s):  
Mechanical Properties ◽  
Peak Power ◽  
Energy Requirements ◽  
Actuation Mechanism ◽  
Power And Energy

A Robotic “Jack Spring”™ for Ankle Gait Assistance

2005 ◽  
Author(s):  
Kevin W. Hollander ◽  
Thomas G. Sugar ◽  
Donald E. Herring
Keyword(s):  
Peak Power ◽  
Energy Requirements ◽  
Linear Actuator ◽  
Direct Drive ◽  
Structure Control ◽  
New Type ◽  
Power And Energy ◽  
The Ideal

A Robotic ‘Jack Spring’™ is a new type of mechanical actuator, which is based upon the concept of structure control. A Jack Spring™ mechanism is used to create an adjustable Robotic Tendon, which is a spring based linear actuator in which the properties of a spring are crucial to its successful use in gait assistance. Like its human analog, the adjustable Robotic Tendon uses its inherent elastic nature to reduce both peak power and energy requirements for its motor. In the ideal example, peak power required of the motor for ankle gait is reduced from 250W to just 81 W. In addition, ideal energy requirements are reduced from nearly 36 Joules to just 25 Joules per step. Using this approach, an initial prototype is expected to provide 100% of the power and energy neccessary for ankle gait in a compact 0.84kg package. This weight is 8 times less than that predicted for an equivalent direct drive approach.

scholarly journals Determining Application-specific Peak Power and Energy Requirements for Ultra-low Power Processors

2017 ◽  
Vol 45 (1) ◽  
pp. 3-16 ◽  
Author(s):  
Hari Cherupalli ◽  
Henry Duwe ◽  
Weidong Ye ◽  
Rakesh Kumar ◽  
John Sartori
Keyword(s):  
Low Power ◽  
Peak Power ◽  
Energy Requirements ◽  
Ultra Low Power ◽  
Power And Energy ◽  
Application Specific

scholarly journals Determining Application-specific Peak Power and Energy Requirements for Ultra-low Power Processors

2017 ◽  
Vol 51 (2) ◽  
pp. 3-16
Author(s):  
Hari Cherupalli ◽  
Henry Duwe ◽  
Weidong Ye ◽  
Rakesh Kumar ◽  
John Sartori
Keyword(s):  
Low Power ◽  
Peak Power ◽  
Energy Requirements ◽  
Ultra Low Power ◽  
Power And Energy ◽  
Application Specific

scholarly journals Determining Application-specific Peak Power and Energy Requirements for Ultra-low Power Processors

2017 ◽  
Vol 52 (4) ◽  
pp. 3-16
Author(s):  
Hari Cherupalli ◽  
Henry Duwe ◽  
Weidong Ye ◽  
Rakesh Kumar ◽  
John Sartori
Keyword(s):  
Low Power ◽  
Peak Power ◽  
Energy Requirements ◽  
Ultra Low Power ◽  
Power And Energy ◽  
Application Specific

Determining Application-Specific Peak Power and Energy Requirements for Ultra-Low-Power Processors

2017 ◽  
Vol 35 (3) ◽  
pp. 1-33 ◽  
Author(s):  
Hari Cherupalli ◽  
Henry Duwe ◽  
Weidong Ye ◽  
Rakesh Kumar ◽  
John Sartori
Keyword(s):  
Low Power ◽  
Peak Power ◽  
Energy Requirements ◽  
Ultra Low Power ◽  
Power And Energy ◽  
Application Specific

An Efficient Robotic Tendon for Gait Assistance

2006 ◽  
Vol 128 (5) ◽  
pp. 788-791 ◽  
Author(s):  
Kevin W. Hollander ◽  
Robert Ilg ◽  
Thomas G. Sugar ◽  
Donald Herring
Keyword(s):  
Energy Efficient ◽  
Peak Power ◽  
Energy Requirements ◽  
Linear Actuator ◽  
Equivalent Motor ◽  
Power And Energy ◽  
The Ideal

A robotic tendon is a spring based, linear actuator in which the stiffness of the spring is crucial for its successful use in a lightweight, energy efficient, powered ankle orthosis. Like its human analog, the robotic tendon uses its inherent elastic nature to reduce both peak power and energy requirements for its motor. In the ideal example, peak power required of the motor for ankle gait is reduced from 250 W to just 77 W. In addition, ideal energy requirements are reduced from nearly 36 J to just 21 J. Using this approach, an initial prototype has provided 100% of the power and energy necessary for ankle gait in a compact 0.95kg package, seven times less than an equivalent motor/gearbox system.

The effects of variable mechanical parameters on peak power and energy consumption of ankle-foot prostheses at different speeds

2018 ◽  
Vol 32 (23) ◽  
pp. 1229-1240 ◽  
Author(s):  
Dianbiao Dong ◽  
Bryan Convens ◽  
Yuanxi Sun ◽  
Wenjie Ge ◽  
Pierre Cherelle ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Peak Power ◽  
Mechanical Parameters ◽  
Power And Energy

scholarly journals A New Method for the Calculation of Energy and Power Requirements of Bucket Wheel Excavators

2019 ◽  
Vol 10 (1) ◽  
pp. 15-20
Author(s):  
József András ◽  
József Kovács ◽  
Endre András ◽  
Ildikó Kertész ◽  
Ovidiu Bogdan Tomus
Keyword(s):  
Energy Consumption ◽  
Numerical Method ◽  
Horizontal Plane ◽  
Vertical Plane ◽  
New Method ◽  
Energy Requirements ◽  
Belt Conveyor ◽  
Analytical Formulas ◽  
Power And Energy ◽  
Continuous Working

Abstract The bucket wheel excavator (BWE) is a continuous working rock harvesting device which removes the rock by means of buckets armoured with teeth, mounted on the wheel and which transfers rock on a main hauling system (generally a belt conveyor). The wheel rotates in a vertical plane and swings in the horizontal plane and raised / descended in the vertical plane by a boom. In this paper we propose a graphical-numerical method in order to calculate the power and energy requirements of the main harvesting structure (the bucket wheel) of the BWE. This approach - based on virtual models of the main working units of bucket wheel excavators and their working processes - is more convenient than those based on analytical formulas and simplification hypotheses, and leads to improved operation, reduced energy consumption, increased productivity and optimal use of available actuating power.

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