Abstract
Independent Cart Conveyor System is one of the most promising technology in automation industries. It combines the benefits of servo motors with the advantages of linear motors. It consists of a close path made up of modular linear motors having a curved or a straight shape that control a fleet of carts independently. Each cart is placed along the motors and it is connected, through rolling bearings, to a rail set on the motors themselves. The bearings are subject to wear and the condition monitoring of these elements is challenging for the non-stationary working conditions of variable load and variable speed profiles. This paper provides a bearing fault vibration model that takes into account the mechanical design of the cart, its motion profile, the shape of the conveyor path, the load variation and the type of fault on the rolling bearing.
Highlights
Independent Cart Conveyor System is an emerging technology in the field of automatic machines
This paper is organized as follows: Section 2 describes the analytic model for bearing faults on linear motors; Section 3 is focused on the algorithm for the model implementation; Section 4 shows the mathematical validation of the model; Section 5 deals with experimental results and model tuning in case of constant speed and variable velocity motion profiles; Section 6 explains the conclusions of the research
The paper details a flexible model for the simulation of the expected fault vibration signal for Independent Cart Conveyor System
Summary
Independent Cart Conveyor System is an emerging technology in the field of automatic machines. These activities are not possible with the traditional motor-driven chains, belts and gears because, in order to change the functionality of the machine, it is necessary to design different mechanical links for every type of product and every rate of production Another important advantage of the use of the Independent Cart System is the reduction of the downtime of the machine. This model allows to simulate the system in different operational conditions such as different path shapes, cart geometry, types of bearings, motion and load profiles. This paper is organized as follows: Section 2 describes the analytic model for bearing faults on linear motors; Section 3 is focused on the algorithm for the model implementation; Section 4 shows the mathematical validation of the model; Section 5 deals with experimental results and model tuning in case of constant speed and variable velocity motion profiles; Section 6 explains the conclusions of the research
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