Dynamic characteristics and efficiency of vibration protection systems

1999 ◽  
pp. 13-59
Author(s):  
Mikhail Z. Kolovsky
Keyword(s):  
Dynamic Characteristics ◽  
Vibration Protection ◽  
Protection Systems

VIBRATION PROTECTION SYSTEMS OF VEHICLES: ACTIVE CONTROL AND OPTIMIZATION

2021 ◽  
Vol 75 (4) ◽  
pp. 20-26
Author(s):  
Chernyshev Vladimir Ivanovich ◽  
◽  
Fominova Olga Vladimirovna ◽  
Gorin Andrey Vladimirovich ◽  
◽  
...  
Keyword(s):  
Active Control ◽  
Information Technologies ◽  
Control Function ◽  
Dynamic Properties ◽  
Singular Control ◽  
Vibration Protection ◽  
Protection Systems ◽  
Protective System ◽  
Link Information ◽  
Compensatory Effect

The article presents the results of studies of the dynamic properties of a vibration-protective system with active control, which is directly identified with the compensatory effect and is charac-terized as direct control, as well as a vibration-protective system with indirect control, which forms a compensatory effect mediated through the implementation of an intermittent process of changes in the parameters of the inertial link. To find the optimal positional control function of direct (ac-tive) control, as well as indirect (singular) control of the inertial link, information technologies for solving boundary value problems were used in relation to the canonical Hamilton equations for the vibration protection systems under study. The parameters are established at which vibration protection systems of this type eliminate resonance phenomena and provide comparable indicators of vibration safety for protected objects under kinematic disturbance.

Mathematical models for evaluating the effectiveness of shock-absorbing fasteners of vibro-active mechanisms of marine objects by vibrational power

2021 ◽  
pp. 13-20
Author(s):  
В.А. Пятакович ◽  
В.Ф. Рычкова ◽  
А.П. Пурденко
Keyword(s):  
Mathematical Models ◽  
Rational Design ◽  
Vibration Isolation ◽  
Vibrational Energy ◽  
Technical Problem ◽  
Vibration Protection ◽  
Protection Systems ◽  
Neural Network System ◽  
Theoretical Mechanics ◽  
Theoretical Developments

Для создания виброакустической защиты судового оборудования необходимо учитывать потоки колебательной энергии, распространяющиеся от источников как через опорные и неопорные связи, так и в виде воздушного шума. В работе представлены математические модели оценки эффективности амортизирующих креплений виброактивных механизмов морских объектов по колебательной мощности, учитываемые при обучении разрабатываемой нейросетевой системы классификации морских целей. Теоретические разработки в области виброзащиты и виброизоляции во многом имеют междисциплинарный характер и опираются на методы теории механизмов и машин, теоретической механики, теории колебаний, теории управления, используются методы инфорьт мационные технологии для оценки, поиска и выбора рациональных проектно-конструкторских решений. Создание амортизирующих устройств, способных защитить объекты от вибраций и ударов и, вместе с тем, обладающих ограниченными размерами, является сложной технической проблемой. В связи с этим первостепенное значение приобретают вопросы теории и расчета адаптивных виброзащитных систем. To create vibro-acoustic protection of ship equipment, it is necessary to take into account the flows of vibrational energy propagating from sources both through support and non-support connections, and in the form of air noise. The paper presents mathematical models for evaluating the effectiveness of shock-absorbing fasteners of vibro-active mechanisms of marine objects by vibrational power, which are taken into account when training the developed neural network system for classifying marine targets. Theoretical developments in the field of vibration protection and vibration isolation are largely interdisciplinary in nature and are based on the methods of the theory of mechanisms and machines, theoretical mechanics, vibration theory, control theory, information technology methods are used to evaluate, search and select rational design solutions. The creation of shock-absorbing devices that can protect objects from vibrations and shocks and, at the same time, have limited dimensions is a complex technical problem. In this regard, the issues of the theory and calculation of adaptive vibration protection systems are of paramount importance.

scholarly journals THE PRIORITY OF VIBRATION PROTECTION SYSTEMS WITH A FLUID COUPLING.

2021 ◽  
Vol 101 (09) ◽  
pp. 454-459
Author(s):  
Anvar Ergashovich Qudratov ◽  
◽  
Nozima Shodiqulovna Raxmatullayeva ◽  
Keyword(s):  
Vibration Protection ◽  
Protection Systems ◽  
Fluid Coupling

Structural Theory of Vibration Protection Systems

2016 ◽  
pp. 427-482
Author(s):  
Igor A. Karnovsky ◽  
Evgeniy Lebed
Keyword(s):  
Structural Theory ◽  
Vibration Protection ◽  
Protection Systems

scholarly journals Application of the parallelogram mechanism with the effect of quasi-zero stiffness in the vibration protection systems of the operator’s chair of a road construction machine

2021 ◽  
Vol 7 (2) ◽  
pp. 132-140
Author(s):  
M.S. Korytov ◽  
◽  
V.S. Sherbakov ◽  
I.E. Pochekueva ◽  
◽  
...  
Keyword(s):  
Vibration Isolation ◽  
Tensile Force ◽  
Road Construction ◽  
Negative Stiffness ◽  
Force Characteristic ◽  
Straight Line Passing ◽  
Tension Spring ◽  
Vibration Protection ◽  
Protection Systems ◽  
Isolation Systems

For vibration protection of operators of construction and road machines, a promising direction is the use of passive vibration protection systems based on mechanisms with quasi-zero rigidity. Passive vibration isolation systems, being less complex than active ones, require less frequent maintenance, are cheaper to manufacture and more reliable than active ones. The problem of selecting the optimal, most reliable and simple design of the mechanism with the effect of quasi-zero rigidity remains urgent. In this case, the most widespread use of elements that create negative stiffness. This requires elements with positive stiffness in the mechanism, which complicates the design. More promising structures of mechanisms, where elements with negative stiffness are not separated into a separate structure. In mechanisms such as the parallelogram, studied in this work, a section with quasi-zero stiffness can be provided with just one tension spring, which simplifies the design and reduces the cost of the entire vibration protection system. By the method of direct analytical inference for the presented diagram of a parallelogram mechanism with one spring, analytical expressions are obtained for the tensile force of the spring necessary to compensate for the force of gravity of the chair with the operator on the height of the chair and the length of the spring. As an example, the graphical dependences of the spring tensile force on the chair lift and on the spring’s own length are given as an example. It was found that the static force characteristic of the spring is a straight line passing through the origin. That is, the zero force corresponds to the zero spring length, which is not technically feasible. It is proposed to use a mechanism that replaces the tension spring, which will provide a given power characteristic.

Sign in / Sign up

Export Citation Format

Share Document