Optimal Tuning of Torsional Oscillating Mechanical Systems

2014 ◽  
pp. 63-69 ◽  
Author(s):  
J. Homišin ◽  
P. Kaššay
Keyword(s):  
Mechanical Systems ◽  
Optimal Tuning

CONTINUOUS TUNING OF SHIP PROPULSION SYSTEM BY MEANS OF PNEUMATIC TUNER OF TORSIONAL OSCILLATION

2021 ◽  
Vol 158 (A3) ◽  
Author(s):  
J Homišin ◽  
P Kaššay ◽  
M Puškár ◽  
R Grega ◽  
J Krajňák ◽  
...  
Keyword(s):  
Mechanical System ◽  
Dynamic Properties ◽  
Torsional Oscillation ◽  
Self Regulation ◽  
Mechanical Systems ◽  
New Method ◽  
Driving Mechanism ◽  
Optimal Tuning ◽  
Continuous Tuning ◽  
The Given

Mechanical system drives consist of driving machines and gearing mechanisms interconnected by shafts and couplings. In terms of dynamics it is possible to say that every driving mechanism is able to oscillate. Especially piston devices can create excessive torsional oscillation, vibrations, as well as noise. Important task of a designer is to reduce torsional oscillation in mechanical systems. Presently this problem is mainly solved by the flexible shaft couplings that are selected with regard to the dynamic properties of the given system. It means that every torsional oscillating mechanical system needs to be suitably tuned. The aim of this paper is to present the possibilities of controlling of dangerous torsional oscillations of the mechanical systems by the means of new method, i.e. its optimal tuning by means of the pneumatic coupling with self-regulation, which were developed by us.

H2 Optimal Tuning of Passive Isolators and Absorbers

1995 ◽  
Author(s):  
Tobin H. Van Pelt ◽  
Dennis S. Bernstein
Keyword(s):  
Mechanical Systems ◽  
Performance Criterion ◽  
Tuning Parameters ◽  
Optimal Tuning ◽  
Classical Scheme ◽  
Classical Work ◽  
H2 Performance ◽  
Tuning Scheme ◽  
Suppression Schemes ◽  
A Performance

Abstract Isolators and absorbers have been studied extensively as a means of passively suppressing vibration in mechanical systems. This paper derives the optimal tuning parameters for these passive suppression schemes with an H2 performance criterion. The H2 norm of a system is briefly reviewed, and its selection as a performance criterion is motivated. The optimal tuning scheme in the case of the absorber is then compared to the classical work of Den Hartog [1] and Snowdon [2]. The comparison shows little improvement in the H2 cost over the classical scheme, which suggests that the approximately optimal H∞ analysis of the absorber respects the optimal H2 cost. However, the reverse is generally not true, as in the case with increasing absorber masses.

Phase space of mechanical systems with a gauge group

1991 ◽  
Vol 161 (2) ◽  
pp. 13-75 ◽  
Author(s):  
Lev V. Prokhorov ◽  
Sergei V. Shabanov
Keyword(s):  
Phase Space ◽  
Gauge Group ◽  
Mechanical Systems

EVALUATION OF MECHANICAL SYSTEMS USED IN PERFUSION

1972 ◽  
Vol 68 (2_Supplb) ◽  
pp. S44-S73 ◽  
Author(s):  
Eugene F. Bernstein
Keyword(s):  
Mechanical Systems ◽  
Organ Perfusion ◽  
Critical Factors ◽  
System 2 ◽  
Common Problems ◽  
Mechanical Components ◽  
Perfusion Experiment ◽  
Selection Of

ABSTRACT Among the critical factors in organ perfusion are (1) the mechanical components of the system, (2) the composition of the perfusate, and (3) the perfusing conditions. In this review, particular consideration is given to the pump, the oxygenator, and cannulas in such systems. Emphasis is placed upon the selection of pertinent equipment for the goals of a particular perfusion experiment, based upon the criteria of adequacy of the perfusion. Common problems in organ perfusion are summarized, and potential solutions to the perfusion problem, involving either biologic or mechanical extracorporeal systems, are suggested.

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