Evaluation of Own Pulses in the Event of Free Vibrations of a Multiparker Type Parking Machine Lifting Machine

2019 ◽  
Vol 34 ◽  
pp. 137-142
Author(s):  
Carmen Elisabeta Radu ◽  
Edward Rășchitor ◽  
Iosif Tempea
Keyword(s):  
Free Vibrations ◽  
Resonance Phenomenon ◽  
Parking Lot ◽  
Common Unit

To study the vibrations of a Multiparker lift lift model, use various models for the lifting mechanism. Calculate the first pulsation using the Dunkerley method. Behavior of the elevator to the action of an explosive task. We intend to evaluate the own pulsations in case of free vibrations of a lifting mechanism at an elevator within a multiparker parking lot. IT is absolutely necessary that the wave pulsation is different from the own pulsation of the studied system so as to avoid the resonance phenomenon leading to the system’s destruction. We shall establish a work algorithm using several models of the system as following: the model of the system with an autonomy degree; the calculation of the first own pulsations is used by the Dunkerley method; the model of the continuous system.A model is executed for the lifting mechanism of the Multiparker parking lot, considered as being composed of a continuous and homogeneous bar, embedded at the base, becoming a common unit with the mass M of the elevator. The own pulsations are determined in case of free vibrations for this bar.

scholarly journals OVERVIEW OF THE KNITTED MATERIALS WITH VIBRATIONS DAMPING CAPACITY

2021 ◽  
Vol 2021 ◽  
pp. 342-347
Author(s):  
C. Grosu ◽  
M. Blaga
Keyword(s):  
Cyclic Stress ◽  
Free Vibrations ◽  
High Potential ◽  
Resonance Phenomenon ◽  
Impact Excitation ◽  
Damping Capacity ◽  
Textile Materials ◽  
Mechanical Field ◽  
Vibration Transmissibility ◽  
Two Phases

Textile materials are often subjected to different stresses, acting on them in two phases: during the knitting phase, when the yarns and the obtained structure are subjected to cyclic stress, but also during the use phase, when the knitted structures are subjected to various stresses. The dynamic behaviour of knitted fabrics in a vibrating environment is usually evaluated by standardized methods, such as the method using vibration exciters (e.g., ISO 10819:2013). However, in recent years, the authors' collective has carried out research to characterize the behaviour of knitted structures in a vibrating environment, using a well-known method for generating vibrations by impact excitation, which is specific to the mechanical field but also has a high potential for application in the textile field. This method refers to the determination of the free vibrations of an elastic system. Its measurement in the design phase of the system is considered a crucial step, since by knowing the frequency range of the system, the resonance phenomenon in the operational phase can be avoided. Similar results obtained by applying standardized methods for measuring vibration transmissibility and the currently adapted method from the field of mechanics to the field of textiles, represent a validation for this type of investigation process and also show the high potential of knitwear to be used in the vibration environment.

Numerical analysis of free vibrations of rectangular plates based on different approaches

2019 ◽  
pp. 33-41
Author(s):  
Oleksandr Grigorenko ◽  
◽  
Maksym Borysenko ◽  
Olena Boychuk ◽  
Volodymyr Novytskyi ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Free Vibrations ◽  
Rectangular Plates

Advanced Vehicle Parking System using PLC and SCADA

2019 ◽  
Vol 8 (6S2) ◽  
pp. 467-470
Keyword(s):  
Open Space ◽  
Organization Structure ◽  
General System ◽  
General Control ◽  
Control Center ◽  
Unit Process ◽  
Basic Goal ◽  
Parking Lot ◽  
Access Information ◽  
The Right

This work is to perceive the open space in the halting reach using PLC and SCADA. The rule target is to recognize the unfilled space and demonstrating the driver to a particular opening. This paper tries to layout and execute an electronic stopping region organization structure. Robotized Parking Lot Management System is a totally utilitarian and painstakingly controlled parking structure organization system that is executed with the usage and compromise of different electronic equipment and littler scale figuring. The layout incorporates assorted stages, from the rule unit; process is passed on to different subunits to achieve the target of full motorization. A moving toward auto will pass on (through the driver) remotely with the essential unit associated with the Parking Office Gate. The essential unit will check the transmitted access information and will pass control after affirmation to the gateway framework drivers, this in this way drives the right entryway control (either exit or segment unit). The system currently screens the development of the driver some time later, and for entry, as the driver moves a destined eparation into the workplace ,the system turns back the entryway segment (for finish of entryway) and passes control to the space part and organization unit. The objective of this later unit is to manage the parking spaces available in the package by watching the development of the automobiles inside, allocating the spaces in a precise manner, watching consistence what's more, prompt the general control center (watched out for) of the space(s) open. It has a show interface for talking with the customers of the workplace. There is in like manner a control center that is watched out for by work power and screens the activities inside the parking structure. It is educated regarding any development, space(s) open and moreover the general system can be shut down or changed on from the control center. The basic goal of this errand is to achieve full motorization and it will find snappy use in tremendous workplaces with different access restrictions, government properties, and school grounds to sectionalize educator's auto stop and understudy's auto stop, etc.

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