scholarly journals Closure to “Discussions of ‘An Energy Method for Determining the Dynamic Characteristics of Mechanisms’” (1950, ASME J. Appl. Mech., 17, pp. 101–103)

1950 ◽  
Vol 17 (1) ◽  
pp. 103
Author(s):  
B. E. Quinn
Keyword(s):  
Dynamic Characteristics ◽  
Energy Method

Energy Method for Determining Dynamic Characteristics of Mechanisms

1949 ◽  
Vol 16 (3) ◽  
pp. 283-288
Author(s):  
B. E. Quinn
Keyword(s):  
Dynamic Characteristics ◽  
Energy Method ◽  
Mechanical Systems ◽  
Direct Approach ◽  
Graphical Methods ◽  
Applied Forces ◽  
Complex Mechanical Systems

Abstract Two types of problems are dealt with in the paper which are involved in the design of mechanisms required to have specified dynamic characteristics: (1) Determination of applied forces required to produce specified dynamic characteristics. (2) Determination of the dynamic characteristics which will result from the application of known forces. While graphical methods may be used in the solution of type (1) problems involving more or less complex mechanical systems, they do not afford a direct approach to type (2) problems. The energy method which will be outlined can be applied in either case, although this paper will be primarily concerned with the determination of the dynamic characteristics which result when a known force is applied to a given mechanism.

Microvibration Model Development and Validation of a Cantilevered Reaction Wheel Assembly

2012 ◽  
Vol 226-228 ◽  
pp. 133-137 ◽  
Author(s):  
Zhe Zhang ◽  
Guglielmo S. Aglietti ◽  
Wei Jia Ren
Keyword(s):  
Dynamic Characteristics ◽  
Energy Method ◽  
Model Development ◽  
Broadband Noise ◽  
Empirical Modeling ◽  
Model Parameters ◽  
Test Results ◽  
Reaction Wheel ◽  
Disturbance Model ◽  
Development And Validation

Reaction wheel assemblies are one of the most important microvibration sources on typical modern satellites. In this paper microvibrations induced by a cantilevered reaction wheel assembly are modelled and validated against microvibration test results. The disturbance model is developed using energy method. A microvibration measurement platform is designed to measure its disturbances. Disturbance test results are analyzed in detail. The peculiar dynamic characteristics such as nonlinearity and high damping of harmonic responses in the test results are discussed. Estimations of damping values used in the disturbance model are introduced. A new method developed to model harmonic excitations is discussed. Furthermore, novel methods to identify harmonics and extract model parameters from test results are presented. The empirical modeling method developed for broadband noise excitations are also introduced and validated.

Dynamic Characteristics of Spatial Mechanisms

1969 ◽  
Vol 91 (1) ◽  
pp. 228-233 ◽  
Author(s):  
E. J. Givens ◽  
J. C. Wolford
Keyword(s):  
Linkage Analysis ◽  
Dynamic Characteristics ◽  
Energy Method ◽  
Planar Mechanisms ◽  
Matrix Methods ◽  
Digital Computation ◽  
Spatial Mechanisms ◽  
Spatial Linkages

An energy method given by Quinnfor determining the dynamic characteristics of planar mechanisms under the action of displacement-related forces is extended to spatial linkages. These linkages may, in addition, be subjected to time-related forces or to velocity-related damping forces. Recently developed matrix methods are used in the linkage analysis resulting in a method well suited to digital computation.

Invited PaperTemperature dependence of SiGe HBT static and dynamic characteristics

1998 ◽  
Vol 08 (PR3) ◽  
pp. Pr3-81-Pr3-86
Author(s):  
F. Aniel ◽  
N. Zerounian ◽  
A. Gruhle ◽  
C. Mähner ◽  
G. Vernet ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Static And Dynamic Characteristics ◽  
Sige Hbt
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