Analysis and estimation of motion transmission errors of a timing belt drive (original) (raw)
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Modeling and Synthesis of Tracking Control for the Belt Drive System
Using of belt for high precision applications has become appropriate because of the rapid development in motor and drive technology as well as the implementation of timing belts in servo systems. Belt drive systems provide high speed and acceleration, accurate and repeatable motion with high efficiency, long stroke lengths and low cost.
FAILURE ANALYSIS OF THE TIMING BELT DRIVES
12th International Conference on Tribology SERBIATRIB `11
This paper refers to testing of timing belt drives. Timing belt drives are relatively young drives that originate from 1950’s. Considering the larger and larger use of timing belts and their limited lifetime, their testing is justified. A large number of factors have influence on timing belt drive’s lifetime: wear, amount of transmitted power, operating environment, coaxiality of shafts and belt pulleys, handling before and during assembly and others. Failure most frequently occurs because of damage of belt’s and belt pulley’s teeth or damage of tractive element due to wear. The paper presents the results of experimental testing of wear and failure of timing belt drives originating from change in their geometrical dimensions. Gained experimental results fully coincide with theoretical assumptions and similar tests around the world.
Mechanism and Machine Theory, 2009
Serpentine belt drives are often used in front end accessory drive of automotive engine. The accessories resistant torques are getting higher within new technological innovations as stater-alternator, and belt transmissions are always asked for higher capacity. Two kind of tensioners are used to maintain minimum tension that insure power transmission and minimize slip: dry friction or hydraulic tensioners. An experimental device and a specific transmission error measurement method have been used to evaluate the performances of a generic transmission by determining the pulley-belt slip for these two kinds of tensioner. A data acquisition technique using optical encoders and based on the angular sampling method is used with success for the first time on a non-synchronous belt transmission. Transmission error between pulleys, pulley/belt slip are deduced from pulley rotation angle measurements.Results obtained show that: the use of tensioner limits belt slip on pulleys, pulley-belt slip is reachable from transmission error measurement, belt non uniform characteristics are responsible of low frequency modulations of transmission error.
Development of timing belt drives
2009
Timing belt drive is relatively new conception of power transfer, accepted in all areas of industry today. Actually, they represent a combination of chain and gear transmission. They are flat belts with series of equal spatial teeth inside addendum diameter. Timing belt transfers the torque by means of its shape.
The Impact of the Pre-Tensioning on the Load Distribution of Timing Belt Drives
2014
The paper presents a numerical analysis of time belt drive. The finite element method (FEM) is applied for calculation of elements in this paper, timing belt and belt pulley at different load ranges. The subject of the analysis in this paper is the impact of pre-tensioning on load distribution at timing belt drive. The impact analysis of the pretensioning of timing belt is conducted for real timing belt drive. The timing belt drive is exposed to different values of the force of the pre-tensioning, and the results of the analysis of the timing belt drive indicate the change of the stresses in the operating conditions of the transmitter, and where the critical points are. The software package Autodesk Inventor Professional is used in analysis.
Influence of Torque Variation on Timing Belt Drive���s Load Distribution
2011
In this paper was made a numerical analysis of timing belt drives. The subject of analysis in this paper is influence transitions of torque on distribution loads of the timing belt drives. For calculating the elements in this paper, timing belts and pulleys, with variable torque values was applied Finite Elements Analysis (FEA). Timing belt drive is exposed to different values of torque, and results indicate how the stresses change in working conditions of drives. Analysis was conducted for real timing belt drive. The analysis is performed using software package Autodesk Inventor Professional.
A Novel Failure Diagnosis System Design for Automotive Timing Belts
Experimental Techniques, 2012
In this study, a novel failure diagnostic system for timing belts was developed in order to prevent a catastrophic belt failure. These failures may occur before running out the nominal belt life and lead to an extensive engine damage, thereby resulting costly repairs. Timing belt failures are generally resulted from three reasons, that is, lack of a tooth, fiber separation on belt sides, and teeth splitting. Three optical sensors with laser beam whose diameter is 0.6 mm was located on suitable positions and it is used to produce error signal resulted from disturbance of laser beam flows due to failure. The error signal is processed by the processor, which is independent from the electronic control unit (ECU) to alert the driver or ECU, directly. Experimental apparatus which consists of two camshaft pulleys and an idler pulley with belt tensioner has been set up to simulate real engine conditions. Experimental results show that the optical monitoring technique is reliable to determine timing belt failure types simultaneously in the range of 500-7000 rpm engine speed and it is also easier, low cost and more applicable than other methods such as vibration monitoring.
Multi-body modelling of timing belt dynamics
Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics, 2003
Although timing belt drives have recently been increasingly used in mechanical design, their behaviour is still considered to a large extent to be unpredictable, especially under varying operative conditions. The acoustic emission of the transmissions, above all, has been thoroughly investigated in past years, but noise still represents an unresolved problem for many applications and a concern for belt designers; therefore, the availability of good predictive models would be very useful for both design and application phases. The present work describes a multi-body numerical model that has been developed for the characterization of the dynamic behaviour of timing belt transmissions, with the nal goal of assessing the acoustic radiation of a given design. Modelling and simulation have been performed by means of commercial software packages, but more additional programming was required to obtain dynamic models capable of simulating the complex behaviour of toothed belt transmissions. Several experimental tests have been performed to identify the many parameters that in uence system dynamics and to validate the resulting computer aided engineering (CAE) model.
Effect of Compliance of the Belt on the Speed Control System
IFAC Proceedings Volumes, 2004
In many web process lines, a belt-pulley transmission system is used to drive the driven rollers, unwind, and/or winder rolls. Though the belt pulley transmission system offers certain advantages over direct-driven system and gear driven systems, the compliance of belt adds additional dynamics which need to be studied. This paper addresses the issue of compliance of belt on the speed control system. A model which includes the compliance of the belt is proposed. Analysis of the dynamic model to address issues such as the feedback scheme to be used and the choice of the feedback gains is performed. Simulation results for a prototype web unwind station with a belt-pulley transmission system are presented and discussed.
TITLE: Modeling, System Identification and Control of a Belt Drive System AUTHOR
Belt drives have been serving the industry for a long period. Certain features of belt drives such as slippage, tension fluctuations, and sliding of the belt on the pulleys lead to highly nonlinear deformation, large rigid body motion, dynamical contact with sticking and slipping zones and cyclic tension. The performance of motion control for belt drives is important in many industrial fields and is affected by these factors. Advanced control can improve robustness of belt drive and result in a faster dynamic response and more accuracy. The Purpose of this project is to develop a mathematical model of an experimental belt drive system through physical modeling and system identification. This model is then used for the design of an advanced robust discrete-time controller. An extensive literature review is provided, covering modeling and control of belt drive system as well as sliding mode control (SMC) theory. Physical modeling is carried out for an experimental system followed by system identification. Both the physical and the identified models are used to analyze and investigate the characteristics of the system. Different control approaches such as discrete-time proportional integral derivative (DPID) and discrete-time sliding mode control (DSMC) are designed and implemented. The results are compared and conclusions are drawn from both control approaches. iii To my wife, Jinbo Zhang. Her encouragement and support made this opportunity possible. iv 2 2 D J 1 1 D J Load Pulley Drive ( ) 611 SIMODRIVE Drive AC * 20 shown in Figure 13. ( ) ( ) c dv c v + ( ) c v