International Journal of Mechanics and Control最新文献_第3页

QUALIFICATION METHODS FOR ASSESSMENT OF ANNOYANCE OF IMPULSIVE SOUNDS 脉冲声恼人度评定方法

International Journal of Mechanics and Control Pub Date : 2014-01-01 DOI: 10.7494/MECH.2014.33.3.67

Bartłomiej Kukulski, T. Wszołek

引用次数: 0

STOCHASTIC ANALYSIS IN THE ACOUSTICS OF DAMPED SOUNDS 阻尼声声学中的随机分析

International Journal of Mechanics and Control Pub Date : 2014-01-01 DOI: 10.7494/MECH.2014.33.1.1

T. Banek

引用次数: 0

PROFESOR ZBIGNIEW ENGEL, DOKTOR HONORIS CAUSA MULTI 1933–2013

International Journal of Mechanics and Control Pub Date : 2013-01-01 DOI: 10.7494/MECH.2013.32.2.37

W. Batko

引用次数: 0

LOW FREQUENCY IDENTIFICATION OF CRITICAL STATES OF TRANSMISSION TOWER STRUCTURES 输电塔结构临界状态的低频识别

International Journal of Mechanics and Control Pub Date : 2013-01-01 DOI: 10.7494/MECH.2013.32.3.102

K. Szopa, M. Iwaniec, A. Gołaś

{"title":"LOW FREQUENCY IDENTIFICATION OF CRITICAL STATES OF TRANSMISSION TOWER STRUCTURES","authors":"K. Szopa, M. Iwaniec, A. Gołaś","doi":"10.7494/MECH.2013.32.3.102","DOIUrl":"https://doi.org/10.7494/MECH.2013.32.3.102","url":null,"abstract":"Transmission towers are vital parts of the overhead power line infrastructures. Any damage to these supporting structures may result in decreased load-bearing capacity and, in consequence, their collapse. Failures of transmission towers are much more severe than power failures, as they not only cause interruption to the energy supply but can also result in considerable costs of infrastructure repairs and damage. Therefore, supporting structures of overhead power lines should be subjected to structural health monitoring. This paper presents a comprehensive database containing natural frequencies and strain energies of all elements for various (simulated) damage states. On the basis of structure modal parameters, by finding the correlation between natural frequencies of damaged structure stored in the created database and natural frequencies of the structure of interest, state of the test structure can be identified. In order to verify this method, a numerical experiment was carried out. Observing the strain energy variation as compared to the undamaged state makes it possible to localize the damage and assess its importance for the further structure exploitation.","PeriodicalId":38333,"journal":{"name":"International Journal of Mechanics and Control","volume":"20 1","pages":"102"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82254704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Active rotor vibration control 主动转子振动控制

International Journal of Mechanics and Control Pub Date : 2013-01-01 DOI: 10.7494/MECH.2013.32.2.77

M. Vítečková, A. Víteček, J. Tuma

引用次数: 3

COUPLED PROBLEMS OF INTERACTION OF DEFORMABLE BODIES AND LIQUID OF HIGH PRESSURE 可变形体与高压液体相互作用的耦合问题

International Journal of Mechanics and Control Pub Date : 2013-01-01 DOI: 10.7494/MECH.2013.32.4.136

K. Shumelchyk, V. Kuzmenko

{"title":"COUPLED PROBLEMS OF INTERACTION OF DEFORMABLE BODIES AND LIQUID OF HIGH PRESSURE","authors":"K. Shumelchyk, V. Kuzmenko","doi":"10.7494/MECH.2013.32.4.136","DOIUrl":"https://doi.org/10.7494/MECH.2013.32.4.136","url":null,"abstract":"Nowadays the problems of interaction between solids and liquid under high and extremely high pressure are fairly relevant. So the main aim of presented research work is: creating the mathematical models and methods to investigate the interaction of bodies that include cracks filled with a compressible liquid or gas. The coupled problem of interaction of nonlinear elastic bodies and liquid of high pressure was considered. The pressure exerted by a liquid or gas present in the cavities of solids depends on the deformation of the body. In turn the deformation is caused by the pressure inside the cavity. The interaction between a deformable body and liquid is presented as a variational problem. The iterative splitting process of the coupled problem was proposed as well as the algorithm of numerical solution based on variational approach and finite element method. The software which allows calculating the stress state of an elastic body for some classes of problems was developed basing on the algorithm of splitting. The plane problem with cavity and solid stamp which imposes pressure on the boundary was considered and the numerical solution was computed using created software.","PeriodicalId":38333,"journal":{"name":"International Journal of Mechanics and Control","volume":"39 1","pages":"136"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80804532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

IDENTIFICATION OF PROBABILITY DISTRIBUTION FORM FOR RESULTS OF SOUND LEVEL MEASUREMENTS 声级测量结果的概率分布形式的识别

International Journal of Mechanics and Control Pub Date : 2013-01-01 DOI: 10.7494/MECH.2013.32.1.6

W. Batko, B. Przysucha

{"title":"IDENTIFICATION OF PROBABILITY DISTRIBUTION FORM FOR RESULTS OF SOUND LEVEL MEASUREMENTS","authors":"W. Batko, B. Przysucha","doi":"10.7494/MECH.2013.32.1.6","DOIUrl":"https://doi.org/10.7494/MECH.2013.32.1.6","url":null,"abstract":"The authors focus their attention on the identification of the probability distribution density function of the sound level, which constitutes the basis for the proper statistical inferences and uncertainty assessments in the environment acoustical hazard control. Their functional form is a metric for the analysis of acoustical measurement results burdened with random errors. Its proper selection conditions the rightness of statistical inferences in relation to the analyzed noise effect. The problem of identification of the noise level probability distribution form was presented on the grounds of the sound L a level monitored at one of the main streets in Lublin. The analysis of differences and references to the normal distribution form, commonly applied to statistical analysis of the acoustical measurement results, was carried out. It is the aim of the authors, that the presented results should become the basis of a broader discussion concerning new estimation procedures of the controlled noise indicators and their uncertainty assessment. Also new verification procedures of the rightness of model acoustical formalisms, assumed in numerous environment acoustic investigations, are required.","PeriodicalId":38333,"journal":{"name":"International Journal of Mechanics and Control","volume":"73 1","pages":"6"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86399498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

REJECTION OF HARMONIC AND TRANSIENT DISTURBANCES OF A SMART STRUCTURE WITH PIEZOELECTRIC ACTUATORS 压电驱动智能结构的谐波和瞬态扰动抑制

International Journal of Mechanics and Control Pub Date : 2013-01-01 DOI: 10.7494/MECH.2013.32.2.41

F. Duarte, Pablo Ballesteros, Xinyu Shu, C. Bohn

{"title":"REJECTION OF HARMONIC AND TRANSIENT DISTURBANCES OF A SMART STRUCTURE WITH PIEZOELECTRIC ACTUATORS","authors":"F. Duarte, Pablo Ballesteros, Xinyu Shu, C. Bohn","doi":"10.7494/MECH.2013.32.2.41","DOIUrl":"https://doi.org/10.7494/MECH.2013.32.2.41","url":null,"abstract":"Light flexible structures are easily prone to vibrate due to external forces or due to forces generated in the inner structure. This situation is common in machinery or mechanical structures with rotational devices. The unwanted vibration of such structures can be compensated with the addition of piezoelectric actuators for active vibration control (AVC). The rejection of harmonic disturbances is frequently done with controllers based on the internal model principle. The goal of this research is to reduce the effect of harmonic disturbances with known (measured) time-varying frequencies acting on a system as well as to increase the damping of the system for the transient response (first mode of vibration). The experimental setup is made up of a slender aluminium flexible beam, a pair of piezoelectric actuators, an accelerometer and two DC motors, as well as the data acquisition and signal conditioning equipment. The harmonic disturbance is generated by DC motors. The control design utilizes an augmented description of the plant. The plant including the disturbance is modelled as a polytopic linear parameter-varying (pLPV) system. An observer-based gain-scheduling controller is calculated based on quadratic stability and the stability is guaranteed for the specified range of variation of the scheduling parameters, also restriction in the performance is introduced in the sense of the H 2 -norm. Experimental results show very good disturbance cancellation.","PeriodicalId":38333,"journal":{"name":"International Journal of Mechanics and Control","volume":"71 1","pages":"41"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85900876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

RESTORING THE PASSIVITY OF SHUNT DAMPING CIRCUITS BASED ON THE SYNTHETIC INDUCTANCE BY THERMAL ENERGY HARVESTING 基于热能量收集的合成电感恢复并联阻尼电路无源性

International Journal of Mechanics and Control Pub Date : 2013-01-01 DOI: 10.7494/MECH.2013.32.1.21

Michał Lubieniecki, T. Uhl

{"title":"RESTORING THE PASSIVITY OF SHUNT DAMPING CIRCUITS BASED ON THE SYNTHETIC INDUCTANCE BY THERMAL ENERGY HARVESTING","authors":"Michał Lubieniecki, T. Uhl","doi":"10.7494/MECH.2013.32.1.21","DOIUrl":"https://doi.org/10.7494/MECH.2013.32.1.21","url":null,"abstract":"For decades people have used ambient energy, e.g., that of rushing streams or wind to obtain usable power. Starting with very low energy conversion, through constant development we have now reached the stage of extensive possibilities of harvesting the energy from the environment we live in. Today, there exist almost unconstrained opportunities to energize a broad spectrum of devices by energy available almost anywhere and of whichever form. One of the great advantages of energy harvesting is to make small electronic devices autonomous eliminating the need ofpower supply and maintenance. Shunt damping systems are unfavorably influenced by the size and mass of the coil inductors. While substituting bulky inductors with synthetic inductors one losses the passivity of the system gaining its practicability. Nevertheless, in order to outperform the actively driven systems, it is indispensable to return the passive properties of the system maintaining its performance. This paper presents the feasibility study ofpowering the passive shunt damping devices by the work that is lost irrevocably in a bearing node. The heat generated in a bearing is converted via the thermoelectric phenomenon and then used to power the synthetic inductance circuitry. In the paper it is shown that the required power levels can be satisfied by the thermoelectric generator paired to a moderately loaded bearing.","PeriodicalId":38333,"journal":{"name":"International Journal of Mechanics and Control","volume":"58 1","pages":"21"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84706386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NUMERICAL SIMULATION AND CO-SIMULATION IN ANALYSIS OF MANIPULATORS’ DYNAMICS 机械臂动力学分析中的数值仿真与联合仿真

International Journal of Mechanics and Control Pub Date : 2013-01-01 DOI: 10.7494/MECH.2013.32.4.129

Dariusz Baran, W. Lisowski

{"title":"NUMERICAL SIMULATION AND CO-SIMULATION IN ANALYSIS OF MANIPULATORS’ DYNAMICS","authors":"Dariusz Baran, W. Lisowski","doi":"10.7494/MECH.2013.32.4.129","DOIUrl":"https://doi.org/10.7494/MECH.2013.32.4.129","url":null,"abstract":"Application of general purpose computing environments to analysis of manipulators’ dynamics gives ability to select elastically the model structure and analysis algorithms, as well as full access to the intermediate results, however, it often requires introduction of various simplifications of the model under consideration. The alternative approach consists in application of the specialized software packages that allow the use of more sophisticated models, but at the cost of restricted access to the intermediate results as well as the limited range of possible modifications of models and solution algorithms. The authors focused on application of the co-simulation technique in analysis of manipulators’ dynamics. Co-simulation consists in application of specialized software packages to formulation of the dynamic model. Next, the model is simulated with use of a general purpose computing environment and co-operating specialized software package. The authors used Matlab/Simulink computing environment and MD ADAMS software package. The paper presents comparison of results, problems of application, as well as remarks on educational applicability of manipulator dynamics analysis with use of the simulation and the co-simulation techniques. Two examples of a manipulator dynamics modelling were considered. One example with a considerably simplified mass spatial distribution, and another one with a mass distribution corresponding to a real commercial manipulator. The achieved analysis results confirmed that application of the co-simulation technique eases the use of complex models in analysis of manipulator dynamics with use of the general purpose computing environments.","PeriodicalId":38333,"journal":{"name":"International Journal of Mechanics and Control","volume":"50 1","pages":"129"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80723532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3