Analysis of Dynamic Behavior of Spray Boom under Step Excitation

Yan, Junchao; Xue, Xiaolong; Cui, Longfei; Ding, Suming; Gu, Wei; Le, Feixiang

doi:10.3390/app112110129

Cited by 12 publications

(6 citation statements)

References 14 publications

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“…According to Figures 13 and 14, it can be found that the displacement deformation of the spray bar is irregular motion, and the displacement deformation size is gradually decreasing [31]. From Figure 16, the displacement deformation of the spray bar in the X, Y and Z directions, the displacement deformation of the spray bar shows a cyclic reciprocal displacement when the sprayer is subjected to step excitation.…”

mentioning

confidence: 95%

Multibody Dynamics Simulation and Vibration Test for High Clearance Orchard Sprayer

Chen

Dai

et al. 2022

Applied Sciences

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High clearance sprayer is a high-efficiency pesticide application machine in orchard management. In this paper, operational safety of high clearance sprayers is validated by using finite element simulation and vibration testing. The 3D model of the frame is simplified by using shell units instead of solid units, the static performance of high clearance sprayer frames under static full load and ultimate torsional conditions was studied by means of finite element simulation tests, the mechanical properties of the frame under step excitation were studied by multi-body dynamic simulation test. The simulation results show that, at a safety factor of 1.5, the maximum stress extremes in the frame are within the safe permissible stress range. During the dynamics analysis, a tire-ground contact simplified model was proposed. The results of the modal analysis show that the inherent frequency distribution of the high clearance sprayer is compact, and the vibration test has measured a large difference between the engine vibration frequency with the inherent frequency of the frame, this means that resonance will not occur. The theoretical analysis shows that the designed high clearance sprayer meets the requirements of large cross-row field operations, the study provides a reference for the overall design of the high clearance sprayer.

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mentioning

confidence: 95%

Multibody Dynamics Simulation and Vibration Test for High Clearance Orchard Sprayer

Chen

Dai

et al. 2022

Applied Sciences

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“…The vertical rolling motion has a significant effect on spray distribution pattern [2,3] and droplet spray uniformity [4][5][6]. To obtain a more consistent droplet distribution and reduce spray drift, it is necessary to keep the spray boom parallel to the crop canopy or ground and maintain a certain distance from the spray nozzle tips to the crop canopy or ground.…”

Section: Introductionmentioning

confidence: 99%

Development of Boom Posture Adjustment and Control System for Wide Spray Boom

Li,

Nie,

Chen

et al. 2023

Agriculture

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To obtain a more consistent droplet distribution and reduce spray drift, it is necessary to keep the entire spray boom parallel to the crop canopy or ground and maintain a certain distance from the spray nozzles to the crop canopy or ground. A high-performance boom active control system was developed for boom trapezoid suspension. The hydraulic system and hardware circuit of the boom control system were designed based on analyzing the configuration of active trapezoid suspension. The mathematical models of valve-controlled hydraulic cylinders and active boom suspensions were developed. Step response and frequency domain response analysis of passive suspension were conducted by Simulink simulations, and then key parameters of the boom suspension and hydraulic system were determined. A feedforward proportion integration differentiation (FPID) control algorithm was proposed to improve the tracking performance. The designed control system was assembled on a 24 m boom with trapezoid suspension. The response characteristic of the active boom control system was tested by the step signal and the sinusoidal signal from a six-degree-of-freedom hydraulic motion platform. Firstly, the tracking performance of the active balance control system for the PID (proportion integration differentiation) and FPID control algorithms was compared for a given 0.2 Hz sine signal. Then, for the ground-following control system, the response characteristics in challenging terrain and tracking performance in less challenging terrain were tested. Field experiment results indicate that the maximum rolling angle of the chassis was 3.896° while the maximum inclination angle of the boom was 0.453°. The results show that the designed boom adjustment and control system can effectively adjust the boom motion in real time and meet the requirements of field operation.

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“…The application of crop protection chemicals is one of the most important treatments in intensive agriculture that is usually performed with field sprayers. This operation should involve technically sound machinery to ensure that the applied chemicals are uniformly distributed over the field 32 , 33 . According to Reynaldo et al 34 and Kappaun et al 35 , effective delivery of crop chemicals is influenced not only by the type of field sprayer, but also by the structure and position of the sprayer boom, as well as the manner in which the boom is attached to the sprayer frame.…”

Section: Introductionmentioning

confidence: 99%

“…The sprayer boom is controlled with the use of specialist devices that register the movement of all boom segments 33 , 34 , 37 . These measurements can be conducted in laboratory track simulators or in the field.…”

Section: Introductionmentioning

confidence: 99%

The use of a Mamdani-type fuzzy model for assessing the performance of a boom stabilization systems in a field sprayer

Kaliniewicz,

Szczyglak,

Lipiński

et al. 2023

Sci Rep

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Fuzzy logic models are increasingly used to control simple and complex devices, as well as entire operating systems. In this study, a fuzzy logic model was applied to assess the performance a boom stabilization system in a field sprayer. The model was tested on a field sprayer with a trapezoid system for stabilizing the sprayer boom with a length of 21 m. Measuring cables for registering the displacement of the boom's terminal segments (right and left) in the vertical and horizontal plane were installed on the sprayer. The field sprayer was connected to a tractor. The model was based on two linguistic variables: "absolute displacement of the boom's terminal segments" and "boom stability index". It was assumed that the sprayer boom was stable when the displacement of the boom's terminal segments did not exceed 0.25% of boom length. The study demonstrated that the proposed model can be reliably used to assess boom stability in real time (during field operations). The time required to achieve boom stability was more than 2.5 times shorter in the vertical than in the horizontal plane, which can be attributed mainly to the structure of the stabilization system. The proposed model is universal, and it can be applied to evaluate other boom stabilization systems in field sprayers.

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Analysis of Dynamic Behavior of Spray Boom under Step Excitation

Cited by 12 publications

References 14 publications

Multibody Dynamics Simulation and Vibration Test for High Clearance Orchard Sprayer

Multibody Dynamics Simulation and Vibration Test for High Clearance Orchard Sprayer

Development of Boom Posture Adjustment and Control System for Wide Spray Boom

The use of a Mamdani-type fuzzy model for assessing the performance of a boom stabilization systems in a field sprayer

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