Mechanical Advantage of Single-Input and Multiple-Output Ports Mechanical Device

1984 ◽  
Vol 106 (4) ◽  
pp. 462-469 ◽  
Author(s):  
A. Midha ◽  
A. S. Hall ◽  
I. Her ◽  
G. M. Bubel
Keyword(s):  
Mechanical Systems ◽  
Output Port ◽  
Efficient Design ◽  
Mechanical Device ◽  
Design Efficiency ◽  
Mechanical Advantage ◽  
Input Force ◽  
Single Output ◽  
Output Force ◽  
Single Input

The mechanical advantage concept has long been used as a measure of design efficiency of mechanical systems, whose function it is to respond by exerting a certain amount of force at the output for a corresponding input force. The mechanical advantage of a device is characterized by a ratio of the output force to the input force, for the instant in consideration. Traditionally, only single-input and single-output port devices have been analyzed for mechanical advantage. The simplicity of such a configuration makes for tractable analysis by one or more methods available. This paper enunciates a more general mechanical device problem containing single-input and multiple-output ports. In particular, emphasis is placed on a single-input and functionally related multiple-output ports device. Its treatment facilitates efficient design of such a device, as exemplified in this paper.

An Alternative Approach to Mechanical Advantage for the Analysis of a Multiple-Input Multiple-Output Mechanical Device

1992 ◽  
Author(s):  
M. M. Ogot ◽  
B. J. Gilmore
Keyword(s):  
Multiple Input Multiple Output ◽  
Output Port ◽  
Mechanical Advantage ◽  
Single Input Single Output ◽  
Input Force ◽  
Alternative Approach ◽  
Output Force ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Single Input

Abstract The design efficiency of mechanical systems has traditionally been measured via mechanical advantage (MA) which relates the amount of force exerted at the output to the corresponding force applied at the input. MA has been confined to single-input single-output devices, and only recently to single-input multiple-output port devices. This paper presents an alternative approach to MA. The classical definition of MA required the input force to do work on the mechanism, and the output force to be worked on by the mechanism. However this may cause problems where the external loads flip back and forth between doing work to and being worked on by the mechanism at different points in the cycle. This paper overcomes this difficulty by considering the input force as that applied by the mechanism actuator, and the output force to be the external or applied load. With these definitions, a general expression for MA applicable to multiple-input, multiple-output port mechanisms is presented.

A Model for Multi-Input Mechanical Advantage in Origami-Based Mechanisms

2018 ◽  
Vol 10 (6) ◽  
Author(s):  
Jared Butler ◽  
Landen Bowen ◽  
Eric Wilcox ◽  
Adam Shrager ◽  
Mary I. Frecker ◽  
...  
Keyword(s):  
Experimental Data ◽  
Compliant Mechanisms ◽  
Compliant Mechanism ◽  
Magnetic Actuation ◽  
Complex Mechanism ◽  
Mechanical Advantage ◽  
Single Output ◽  
Multiple Input ◽  
Engineering Problems ◽  
Single Input

Mechanical advantage is traditionally defined for single-input and single-output rigid-body mechanisms. A generalized approach for identifying single-output mechanical advantage for a multiple-input compliant mechanism, such as many origami-based mechanisms, would prove useful in predicting complex mechanism behavior. While origami-based mechanisms are capable of offering unique solutions to engineering problems, the design process of such mechanisms is complicated by the interaction of motion and forces. This paper presents a model of the mechanical advantage for multi-input compliant mechanisms and explores how modifying the parameters of a model affects their behavior. The model is used to predict the force-deflection behavior of an origami-based mechanism (Oriceps) and is verified with experimental data from magnetic actuation of the mechanism.

Comparative analysis of SISO and wavelength diversity-based FSO systems at different transmitter power levels

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Varun Srivastava ◽  
Abhilash Mandloi ◽  
Dhiraj Kumar Patel
Keyword(s):  
Optical Signal ◽  
Free Space Optical ◽  
Optical Source ◽  
Transmit Power ◽  
Single Input Single Output ◽  
Transmitter Power ◽  
Single Output ◽  
Communication Links ◽  
Single Input ◽  
Matching Performance

AbstractFree space optical (FSO) communication refers to a line of sight technology, which comprises optical source and detector to create a link without the use of physical connections. Similar to other wireless communication links, these are severely affected by losses that emerged due to atmospheric turbulence and lead to deteriorated intensity of the optical signal at the receiver. This impairment can be compensated easily by enhancing the transmitter power. However, increasing the transmitter power has some limitations as per radiation regulations. The requirement of high transmit power can be reduced by employing diversity methods. This paper presents, a wavelength-based diversity method with equal gain combining receiver, an effective technique to provide matching performance to single input single output at a comparatively low transmit power.

Synthesis of Single-Input and Multiple-Output Port Mechanisms with Springs for Specified Energy Absorption

1994 ◽  
Vol 116 (3) ◽  
pp. 937-943 ◽  
Author(s):  
J. G. Jenuwine ◽  
A. Midha
Keyword(s):  
Energy Absorption ◽  
Output Port ◽  
Constant Force ◽  
Plane Symmetry ◽  
Multiple Precision ◽  
Linear Spring ◽  
Single Input ◽  
Force Mechanism ◽  
Closure Method ◽  
Constant Force Mechanism

A means of synthesis of single-input and multiple-output port mechanisms for specified energy absorption is formulated for multiple precision points. The synthesis presented makes use of an extension of the loop closure method which includes expressions for energy absorption by linear spring elements. The configuration considered locates spring elements at two output ports of a multi-loop, planar mechanism. Economies realized for the symmetric mechanism are discussed for both one- and two-plane symmetry. Synthesis examples are included for both the general and symmetric mechanism. Special applications presented include synthesis of a constant force mechanism and synthesis of a mechanism suited to the energy absorption requirements of an automotive crashworthiness system.

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