The Compensation of Temperature Errors in Millivoltmeters A Study of the Swinburne Method for Minimum Energy Loss

1939 ◽  
Vol 10 (10) ◽  
pp. 298-303
Author(s):  
John H. Miller ◽  
Earl M. Underhill
Keyword(s):  
Energy Loss ◽  
Minimum Energy ◽  
Temperature Errors

Optimization-Based Design of a Leg Mechanism via Combined Kinematic and Structural Analysis

1994 ◽  
Author(s):  
W. B. Shieh ◽  
S. Azarm ◽  
L. W. Tsai ◽  
A. L. Tits
Keyword(s):  
Energy Loss ◽  
Degrees Of Freedom ◽  
Controller Design ◽  
Minimum Energy ◽  
Problem Formulation ◽  
Minimal Energy ◽  
Interactive Optimization ◽  
Joint Forces ◽  
Four Bar Linkage ◽  
Optimization Based Design

Abstract We study a recently proposed compound two degrees of freedom planar leg mechanism consisting of a four-bar linkage and a pantograph. In this mechanism, one degree of freedom is used for normal walking to provide an ovoid path which emulates that of humans while the other is used only when necessary to walk over obstacles. Potential advantages of such a compound mechanism are fast locomotion, minimal energy loss, simplicity in controller design, and slenderness of the leg. To exploit these to the fullest, a multiobjective optimization-based design problem formulation is proposed with the following four design objectives: (i) minimum leg height, (ii) minimum of the maximum joint forces, (iii) minimum leg mass, and (iv) minimum energy loss for a walking cycle. In addition, this problem formulation takes into account a combination of mechanism requirements and structural requirements. Several tradeoff solutions are obtained using the Consol-Optcad interactive optimization-based design package.

Energy Efficient Cam-Follower Systems

1983 ◽  
Vol 105 (4) ◽  
pp. 681-685 ◽  
Author(s):  
F. Freudenstein ◽  
M. Mayourian ◽  
E. R. Maki
Keyword(s):  
Energy Efficiency ◽  
Energy Loss ◽  
Energy Efficient ◽  
Energy Savings ◽  
Functional Dependence ◽  
Minimum Energy ◽  
Optimization Strategy ◽  
Cam Follower ◽  
Return Spring ◽  
Rating Factor

The energy loss in cam-follower systems due to friction between moving parts can be a significant contributor to the power loss in machinery. Considering the total number of cam-operated machines in manufacturing and other operations, the energy savings obtainable by improving the efficiency of the average cam-follower system by even a small percentage would be significant. In this investigation a new rating factor—an energy-loss coefficient proportional to the energy loss at the cam-follower interface—has been defined and evaluated. The rating factor relates to energy efficiency in a manner analogous to the way in which the well-known rating factors for velocity, acceleration, and shock relate to the kinematic characteristics of the cam-follower system. Two cam-follower configurations have been considered: 1) a follower motion governed by both cam and return spring, and 2) a follower positively driven by the cam. In both cases it was found that cam curves with identical rise and rise times can differ substantially in energy efficiency thereby demonstrating the significance of an energy-optimization strategy in the design of cam-follower systems. The nature of the functional dependence of the energy loss on system parameters has been identified and a minimum energy-loss limit established.

scholarly journals Effects of Radiative Electro-Magnetohydrodynamics Diminishing Internal Energy of Pressure-Driven Flow of Titanium Dioxide-Water Nanofluid due to Entropy Generation

Entropy ◽  
2019 ◽  
Vol 21 (3) ◽  
pp. 236 ◽  
Author(s):  
Ahmed Zeeshan ◽  
Nasir Shehzad ◽  
Tehseen Abbas ◽  
Rahmat Ellahi
Keyword(s):  
Titanium Dioxide ◽  
Electric Field ◽  
Energy Loss ◽  
Entropy Generation ◽  
Volume Fraction ◽  
Minimum Energy ◽  
Average Energy ◽  
Working Fluid ◽  
Wavy Channel ◽  
Different Temperatures

The internal average energy loss caused by entropy generation for steady mixed convective Poiseuille flow of a nanofluid, suspended with titanium dioxide (TiO2) particles in water, and passed through a wavy channel, was investigated. The models of thermal conductivity and viscosity of titanium dioxide of 21 nm size particles with a volume concentration of temperature ranging from 15 °C to 35 °C were utilized. The characteristics of the working fluid were dependent on electro-magnetohydrodynamics (EMHD) and thermal radiation. The governing equations were first modified by taking long wavelength approximations, which were then solved by a homotopy technique, whereas for numerical computation, the software package BVPh 2.0 was utilized. The results for the leading parameters, such as the electric field, the volume fraction of nanoparticles and radiation parameters for three different temperatures scenarios were examined graphically. The minimum energy loss at the center of the wavy channel due to the increase in the electric field parameter was noted. However, a rise in entropy was observed due to the change in the pressure gradient from low to high.

Minimum energy-loss guidance for aeroassisted orbital plane change

1985 ◽  
Vol 8 (4) ◽  
pp. 487-493 ◽  
Author(s):  
D.G. Hull ◽  
J.M. Giltner ◽  
J.L. Speyer ◽  
J. Mapar
Keyword(s):  
Energy Loss ◽  
Minimum Energy ◽  
Orbital Plane ◽  
Plane Change

A model study of tidal barrage sluices for minimum energy loss

1985 ◽  
Vol 23 (5) ◽  
pp. 453-466 ◽  
Author(s):  
C. I. Robertson ◽  
R. H. J. Sellin
Keyword(s):  
Energy Loss ◽  
Minimum Energy ◽  
Model Study
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