Multivariate Structural Vibration Coupling Response of the Self-Propelled Straw Pickup Baler Under Time-Varying Loads

Bangzhui Wang, Kexin Que, Zhong Tang (), Meiyan Sun, Yi Lian and Haoyang Wang
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Bangzhui Wang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Kexin Que: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Zhong Tang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Meiyan Sun: College of Transportation Engineering, Jiangsu Shipping College, Nantong 226010, China
Yi Lian: College of Transportation Engineering, Jiangsu Shipping College, Nantong 226010, China
Haoyang Wang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China

Agriculture, 2024, vol. 14, issue 11, 1-28

Abstract: The self-propelled straw pickup baler in agricultural work is responsible for collecting and compressing straw to facilitate transportation and storage, while reducing waste and environmental pollution. Like other agricultural equipment, the straw pickup baler is a complex mechanical system. During operation, its excitation characteristics under multi-source stimuli and the coupling characteristics of various components are not yet clear. This paper analyzed the excitation mechanics property of each component of the self-propelled straw pickup baler and established balance equations. Based on the balance equations, the coupling characteristics of the structures were studied. Through experiments collecting excitation signals from multiple devices under different operating conditions, the vibration excitation signals of each component were obtained. The experiments revealed that the excitation and coupling signals in the Z direction are particularly evident. Based on experiments, the effective Z-direction vibration signal value on the left front of the chassis exceeds 7 m·s 2 , while on the right front it increases from 1.995 m·s 2 to 7.287 m·s 2 , indicating the most intense vibration direction. It was also found that, at the driver’s cab, the effective Z-direction vibration signal values at two response points, 11 and 12, both exceed 7 m·s 2 . The data indicate significant vibrations occur in both the longitudinal and vertical directions. Using the Signal Analyzer module in MATLAB for signal processing, it was found that the prominent filtered signals consist of combustion excitation harmonics and continuous low-frequency vibrations from the compression mechanism. The periodic reciprocating compression motion of the crank-slider mechanism causes sustained impacts on the frame, leading to periodic changes in the vibration amplitude of the chassis. Thus, the vibration reduction of the compression mechanism’s periodic motion is key to reducing the overall vibration of the machine.

Keywords: signal analysis; incentive coupling; fault analysis; straw pickup baler; agricultural equipment (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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