Application of Periodic Disturbance Observer for Periodic Transfer Variances on Timing Belt Drives

2002 ◽  
Vol 2002 (0) ◽  
pp. 85
Author(s):  
H. Lee ◽  
N. Takesue ◽  
J. Furusho
Keyword(s):  
Disturbance Observer ◽  
Periodic Disturbance ◽  
Belt Drives ◽  
Timing Belt

Transmission Error in Helical Timing Belt Drives (Case of a Period of Pulley Pitch)

2000 ◽  
Vol 123 (1) ◽  
pp. 104-110 ◽  
Author(s):  
Masanori Kagotani ◽  
Hiroyuki Ueda ◽  
Tomio Koyama
Keyword(s):  
Helix Angle ◽  
Transmission Error ◽  
Face Advance ◽  
Experimental Conditions ◽  
Belt Drives ◽  
Noise Characteristics ◽  
Synchronous Rotation ◽  
Timing Belt ◽  
Belt Width ◽  
Static Conditions

Helical timing belts have been developed in order to reduce the noise that occurs when conventional timing belts are driven. Helical timing belts are characterized by synchronous rotation. Although several studies have been performed to clarify the noise characteristics and belt life of helical timing belts, the transmission error of these belts remains unclear. In the present study, the transmission error having a period of one pitch of the pulley was investigated both theoretically and experimentally for helical timing belt drives. Experimental conditions were such that the transmission force acts on the helical timing belts under quasi-static conditions and the belt incurs belt climbing at the beginning of meshing and at the end of meshing. Experimental results obtained for the transmission error agreed closely with the computed results. The computed results revealed that helical timing belts can be analyzed as a set of very narrow belts for which the helix angle is zero. The transmission error was found to decrease when the helix angle or the belt width increase within a range defined such that the face advance is less than one belt pitch. In addition, there exists an appropriate installation tension that reduces the transmission error.

scholarly journals Speed Fluctuation Suppression Based on an Adaptive Periodic Disturbance Observer for an Inverter Compressor

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5014
Author(s):  
Fankun Meng ◽  
Zhengguo Li ◽  
Xiaoli Sun ◽  
Xiaoqin Wen ◽  
Michael Negnevitsky ◽  
...  
Keyword(s):  
Disturbance Observer ◽  
High Efficiency ◽  
Low Frequency ◽  
Notch Filter ◽  
Fundamental Wave ◽  
Matlab Simulation ◽  
Frequency Range ◽  
Periodic Disturbance ◽  
Adaptive Notch Filter ◽  
Speed Fluctuation

Repetitive operations have been extensively used in the inverter compressor refrigeration industry. The approximately periodic disturbance caused by repetitive operations must be compensated to realize stable and high-efficiency operation. In this paper, a periodic disturbance observer (PDOB) is proposed to tackle the speed fluctuation of an inverter compressor in the low-frequency range. Periodic disturbance, consisting of a fundamental wave and corresponding harmonics, can thus be estimated and compensated; in addition, sensitivity and complementary sensitivity can reach a compromise through the use of a certain parameter. Aiming at a different operation environment, an adaptive notch filter based on the Steiglitz–McBride method is employed to estimate the fundamental frequency of periodic disturbance. Finally, the feasibility of our approach is verified by MATLAB simulation, and experiments are implemented to illustrate that speed fluctuation can be more effectively attenuated by the proposed method in comparison with general DOB.

Experimental/Numerical Analysis of the Timing Belt Drive Behavior of a V6 Engine

2003 ◽  
Author(s):  
Lionel Manin ◽  
Didier Remond ◽  
Jean-Philippe Gaborel
Keyword(s):  
Rotation Speed ◽  
Transmission Error ◽  
Strain Gauges ◽  
Belt Drive ◽  
Automotive Engine ◽  
Transmission Errors ◽  
Belt Drives ◽  
Harmonic Content ◽  
Timing Belt ◽  
The Time Domain

The timing belts used for automotive engine are asked to last more and more, and to be less noisy. In this way, it is necessary to simulate the behavior of the engine timing belt drives for optimization, but also to understand it from experimental analysis. The first objective of the work was to analyze experimentally the behavior of a V6 engine timing belt drive in terms of: pulley speeds, belt span tensions, transmission error. The second objective was to compare the measurements with simulations. The engine has four overhead camshafts and 4 valves per cylinder. The timing belt drive is composed of six pulleys, three idlers and an automatic tensioner. The crankshaft and the two first camshaft speeds are measured with optical encoders. Spans tensions are measured by means of strain gauges glued on the idler mounting axes. All the data are simultaneously recorded. Tests have been run from 800 rpm to 6000 rpm. Measured data are first analyzed in the time domain. Some phenomena like, nil span tensions, speeds acyclism and transmission error amplitude, are observed. Then, analyses of the harmonic content of the span tensions, pulley speeds and transmission errors between the crankshaft and the camshafts, are performed versus engine rotation speed. Finally, the tests have been simulated and comparisons are made between numerical and experimental results.

Load Distribution in Timing Belts

1978 ◽  
Vol 100 (2) ◽  
pp. 208-215 ◽  
Author(s):  
G. Gerbert ◽  
H. Jo¨nsson ◽  
U. Persson ◽  
G. Stensson
Keyword(s):  
Load Distribution ◽  
Test Procedure ◽  
Spring Constant ◽  
The Finite Element Method ◽  
Belt Drives ◽  
Exponential Character ◽  
Timing Belt ◽  
Steel Cord ◽  
The Subject ◽  
Theory And Experiment

A theory is presented for determining the distribution of the belt tension and the tooth load in timing belts. It appears that the distribution of both loads is of exponential character and one important parameter is the ratio between the spring constant of the tooth and the spring constant of the cord (a nondimensional number). Friction between the belt and the top of the pulley is also considered. This mostly influences the tooth load distribution. A criterion is presented for maximum tension ratio with respect to correct tooth action. Two belts are examined experimentally (steel cord-urethane and glass fiber cord-neoprene rubber). The spring constant of the tooth is determined both experimentally (a test procedure is presented) and theoretically (using the finite element method) and the agreement is good. The distribution of the belt tension in timing belt drives has been measured. The agreement between theory and experiment for the belts examined is satisfactory. Some discrepancies were observed. These will be the subject for further research.

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