Vibration Confinement via Optimal Eigenvector Assignment and Piezoelectric Networks

2004 ◽  
Vol 126 (1) ◽  
pp. 27-36 ◽  
Author(s):  
J. Tang ◽  
K. W. Wang
Keyword(s):  
The State ◽  
Simultaneous Optimization ◽  
Structural Vibration ◽  
Control Input ◽  
Eigenstructure Assignment ◽  
Assignment Algorithm ◽  
Underlying Principle ◽  
Rayleigh Principle ◽  
Assignment Approach ◽  
Selection Of

The underlying principle for vibration confinement is to alter the structural vibration modes so that the corresponding modal components have much smaller amplitude in concerned area than in the remaining part of the structure. In this research, the state-of-the-art in vibration confinement technique is advanced in two correlated ways. First, a new eigenstructure assignment algorithm is developed to more directly suppress vibration in regions of interest. This algorithm is featured by the optimal selection of achievable eigenvectors that minimizes the eigenvector components at concerned region by using the Rayleigh Principle. Second, the active control input is applied through an active-passive hybrid piezoelectric network. With the introduction of circuitry elements, which are much easier to implement than changing or adding mechanical components, the state matrices can be reformed and the design space for eigenstructure assignment can be greatly enlarged. To maximize the system performance, a simultaneous optimization/optimal eigenvector assignment approach to decide the passive and active parameters concurrently is outlined. The merits of the proposed system and scheme are demonstrated and analyzed using numerical examples.

Vibration Confinement via Optimal Eigenvector Assignment and Piezoelectric Networks

2001 ◽  
Author(s):  
J. Tang ◽  
K. W. Wang
Keyword(s):  
Design Space ◽  
State Of The Art ◽  
The State ◽  
Regions Of Interest ◽  
Control Input ◽  
Eigenstructure Assignment ◽  
Assignment Algorithm ◽  
Underlying Principle ◽  
Rayleigh Principle ◽  
Selection Of

Abstract The underlying principle for vibration confinement is to alter the structural modes so that the corresponding modal components have much smaller amplitude in concerned areas than the remaining part of the structure. In this research, the state-of-the-art in vibration confinement technique is advanced in two correlated ways. First, a new eigenstructure assignment algorithm is developed to more directly suppress vibration in regions of interest. This algorithm is featured by the optimal selection of achievable eigenvectors that minimizes the eigenvector components at concerned areas by using the Rayleigh Principle. Second, the active control input is applied through an active-passive hybrid piezoelectric network. With the introduction of circuitry elements, which is much easier to implement than changing or adding mechanical components, the state matrices can be reformed and the design space in eigenstructure assignment can be greatly enlarged. The merit of the proposed system and scheme is demonstrated and analyzed using a numerical example.

Селекция и семеноводство картофеля в Камчатском крае

2018 ◽  
Author(s):  
N.I. Ryakhovskaya ◽  
T.P. Sherstyukova ◽  
M.L. Gamolina
Keyword(s):  
Russian Federation ◽  
Potato Yield ◽  
The State ◽  
Limiting Factors ◽  
State Register ◽  
Region Selection ◽  
New Varieties ◽  
The Russian Federation ◽  
Selection Of

Рассмотрены агроклиматические условия Камчатского края и лимитирующие факторы, сдерживающие рост урожайности картофеля. Приведены характеристики новых сортов картофеля селекции Камчатского НИИСХ созданных в соответствии с приоритетными для региона направлениями селекции, включенных в Государственный реестр селекционных достижений РФ и охраняемых патентами.Agroclimatic conditions of the Kamchatka Krai and limiting factors that restrain the growth of potato yield are considered. The characteristics of new varieties of potatoes of the selection of the Kamchatsky RIA are created in accordance with the priority for the region selection areas included in the State Register of Selection Achievements of the Russian Federation and protected by patents.

scholarly journals Selection of cotton lines for high oil content

2017 ◽  
Vol 52 (7) ◽  
pp. 530-538 ◽  
Author(s):  
Luiz Paulo de Carvalho ◽  
Josiane Isabela da Silva Rodrigues ◽  
Francisco José Correia Farias
Keyword(s):  
Oil Content ◽  
Genetic Parameters ◽  
Fiber Quality ◽  
Rio Grande ◽  
Field Trials ◽  
The State ◽  
The Other ◽  
Expected Gain ◽  
High Heritability ◽  
Selection Of

Abstract: The objective of this work was to evaluate the oil content and characters related to fiber quality and yield in cotton lines (Gossypium hirsutum), in order to select genotypes with high oil content and acceptable levels of the other characters. Twenty-two F6 lines and three checks were cultivated in three field trials - two in the municipality of Apodi, in the state of Rio Grande do Norte, and one in the municipality of Barbalha, in the state of Ceará, both in Brazil. The genetic parameters and the genetic gain from selecting 20% of the lines were estimated according to their means in each environment and in the group of environments. Regarding oil content, there is genetic variability, and the selection based on the overall mean is indicated, since this character showed high heritability, with 4.58% expected gain. The lines selected with this criterion have oil contents between 23.52 and 24.51%, which are higher than those of the Brazilian cultivar BRS Aroeira with the highest grain oil content (22.04%).

Analysis of Elastic Motion Stability of Flexible Manipulator Arm Based on Lyapunov Stability Theory

2014 ◽  
Vol 620 ◽  
pp. 321-329
Author(s):  
Guang Rui Liu ◽  
Wen Bo Zhou ◽  
Rong Fu Liu
Keyword(s):  
Lyapunov Stability ◽  
Stability Theory ◽  
Lagrange Equation ◽  
Lyapunov Stability Theory ◽  
The State ◽  
Flexible Manipulator ◽  
Rotational Inertia ◽  
Control Input ◽  
Motion Stability ◽  
Manipulator Arm

In order to study the elastic motion stability of flexible manipulator arm , to compute the maximum dynamic allowable payload , the partial differential equation of elastic motion of the flexible manipulator arm is solved using the method of Laplace transformation , the dynamic model of flexible manipulator arm carried addition mass on its end position is established ,simplified and truncated using Lagrange equation . the state space expression is established with the state variable and control input and output variable designated , the elastic motion stability rule is built upon and simplified using Lyapunov stability theory . The influence of the end position addition mass and articulation rotational inertia of flexible manipulator arm on its elastic motion stability is analyzed using the stability rule , and the dynamic maximum allowable payload of flexible manipulator arm on its end position is computed in order to guarantee its elastic motion stability . this study is important to the design of robot mechanical manipulator and corresponding drive control system .

Observations On the Sexual Behaviour of Some Longicorn Beetles, Subfamily Lepturinae (Coleoptera, Cerambycidae)

Behaviour ◽  
1963 ◽  
Vol 22 (1-2) ◽  
pp. 152-166 ◽  
Author(s):  
Axel Michelsen
Keyword(s):  
Comparative Analysis ◽  
Sexual Behaviour ◽  
The State ◽  
Round Dance ◽  
Selection Of ◽  
Stimulation Of

AbstractA description is given of the sexual behaviour of 16 longicorn beetles of the subfamily Lepturinae. The following points have been investigated:- 1. Stimulation of the female performed by the male either as a "licking" or combined "licking and tapping" of the female elytra or the grasping of an antenna of the female. 2. Movements of the antennae of the male, which seem to be an expression of the "state of excitement" of the male. These movements are in principle thought to be one of the behaviour patterns originally present in the order Coleoptera. 3. A "round dance", one of the methods for the female to throw off the male after copula, is described. 4. A selection of partner according to size is described in the genus Rhagium. 5. A comparative analysis is attempted for some species and systematic conclusions of such comparisons are proposed.

Control Proxy Functions for Sequential Design and Control Optimization

2011 ◽  
Vol 133 (9) ◽  
Author(s):  
Diane L. Peters ◽  
P. Y. Papalambros ◽  
A. G. Ulsoy
Keyword(s):  
Simultaneous Optimization ◽  
Sequential Optimization ◽  
Control Optimization ◽  
Smart Products ◽  
System Solution ◽  
Optimal System Design ◽  
Problem Formulations ◽  
And Control ◽  
Sequential Strategy ◽  
Selection Of

Optimal system design of “smart” products requires optimization of both the artifact and its controller. When the artifact and the controller designs are independent, the system solution is straightforward through sequential optimization. When the designs are coupled, combined simultaneous optimization can produce system-optimal results, but presents significant computational and organizational complexity. This paper presents a method that produces results comparable with those found with a simultaneous solution strategy, but with the simplicity of the sequential strategy. The artifact objective function is augmented by a control proxy function (CPF), representing the artifact’s ease of control. The key to successful use of this method is the selection of an appropriate CPF. Four theorems that govern the choice and evaluation of a CPF are given. Each theorem is illustrated using a simple mathematical example. Specific CPFs are then presented for particular problem formulations, and the method is applied to the optimal design and control of a micro-electrical mechanical system actuator.

scholarly journals Methodical basis of social security measurement of the state

2020 ◽  
pp. 56-62
Author(s):  
Oleh Dzoba ◽  
Nataliia Stavnycha
Keyword(s):  
Social Security ◽  
Social Protection ◽  
Calculated Data ◽  
The State ◽  
Security Assessment ◽  
The Social ◽  
Methodical Basis ◽  
Definition Of ◽  
Selection Of ◽  
Integral Indicator

Summary the article has analyzed the existing scientific and methodological approaches to assessing the level of social security of the state. It was revealed that they differ because: scientists include various components that form social security; they use various indicators and calculation methods; have various aspects of both generalization and practical direction. It was revealed that most often the components of social security include: safety of life, health, social protection and aspects of social and labor relations. The methods that are most often used in calculating the level of social security were considered. It was proved that in assessment, the selection of indicators that pose a threat, is the difficult task. It was revealed that there is no legally approved methodology for assessing the social security of the state. The use of various social security assessment methodologies was analyzed. Emphasis was placed on the selection of indicators used in these techniques. It was concluded that for assessing the social security of the state, an integral indicator is used most often. At the same time, scientists prefer their own set of indicators. The author’s definition of «social security» was presented, which allowed the formation of four components of the state’s social security (life, poverty, health and education). It was established that the choice of indicators for assessing the social security of the state should cover a retrospective period and should be based on both reporting and calculated data. A hierarchical model of an integral indicator of state social security was proposed. There was defined a set of indicators for each of proposed component. The following algorithm has been proposed for assessing the integral indicator of state social security: the formation of the components of social security and the definition of indicative indicators for each of the components; formation of a database; determination of an integral indicator; determining the influence of each component on the change in the integral indicator; interpretation of indicators; determining the sustainability of hazardous trends.

scholarly journals Polityka władz państwowych wobec wyboru i działalności metropolity Makarego, zwierzchnika Polskiego Autokefalicznego Kościoła Prawosławnego

2015 ◽  
pp. 72-84
Author(s):  
Stefan Dudra
Keyword(s):  
Government Policy ◽  
The State ◽  
Russian Orthodox ◽  
Orthodox Church ◽  
Russian Orthodox Church ◽  
Close Cooperation ◽  
Post War ◽  
The Individual ◽  
The Church ◽  
Selection Of

Government policy towards the election and activity of Metropolitan Macarius (Oksijuk) In post-war Poland, the state authorities aimed at taking control of the religious life of the individual Churches and religious organizations. Surveillance efforts were made to maintain, among others, by appropriate selection of the superior of the Church and diocesan bishops. The election of Macarius (Oksijuk), Archbishop of the Russian Orthodox Church for the position of Metropolitan in July 1951 years should be understood in this context. The hierarch was also to give a guarantee of loyalty, implement his policy in line with the vision of communist authorities and ensure close cooperation with the Patriarchate of Moscow. Unrealized demands of the state authorities (emerging Russification trends, the lack of wider support in missionary activity among the Greek Catholics) contributed to undertake a process of dismissing Macarius from managing the Orthodox Church. Polityka władz państwowych wobec wyboru i działalności metropolity Makarego, zwierzchnika Polskiego Autokefalicznego Kościoła PrawosławnegoPowojenna polityka państwa wobec Polskiego Autokefalicznego Kościoła Prawosławnego zmierzała do ograniczenia jego roli tylko do zadań religijnych, jednocześnie przy objęciu pozostałej działalności całkowitą kontrolą. Nadzór starano się utrzymywać m.in. poprzez odpowiedni dobór zwierzchnika Kościoła. Jednym z elementów polityki był wybór na stanowisko metropolity w 1951 roku Makarego (Oksijuka), arcybiskupa Rosyjskiego Kościoła Prawosławnego. Po odsunięciu w 1948 roku od zarządzania Kościołem metropolity Dionizego władze wyznaniowe dążyły do obsadzenia tronu metropolitalnego przez hierarchę, który miałby realizować politykę kościelną zgodną z linią polityczną władz. Pomimo zrealizowania założonych celów metropolita Makary okazał się hierarchą, który nie spełnił oczekiwań władz (m.in. w zakresie polityki wobec grekokatolików), co wpłynęło na podjęcie decyzji o usunięciu go z zajmowanego stanowiska.

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