Active Force Control Applied to Spray Boom Structure

Tahmasebi, Mona; Rahman, Roslan Abdul; Mailah, Musa; Gohari, Mohammad

doi:10.4028/www.scientific.net/amm.315.616

Cited by 14 publications

(16 citation statements)

References 13 publications

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“…Hence, actuating force can be measured simply by force transducers, and accelerometer can provide the value of a′. The estimated mass may be given by assuming a perfect model, crude approximation [25,34,35], or intelligent method [29]. In other words, if all parameters have been obtained successfully, the resulting estimated force from equation (5) would result in a stable and robust performance of the proposed control system [28].…”

Section: Active Force Controlmentioning

confidence: 99%

“…The AFC approach was primarily used for vibration control by Hewit et al [20] to control motion of a flexible manipulator. Furthermore, the AFC integrated with conventional controller was employed in active suspension systems of vehicles [19,[21][22][23] though it has been applied to roll vibration cancellation of a spray boom [24][25][26][27]. In addition, AFC was utilized in trajectory control of a mobile robot [28].…”

Section: Introductionmentioning

confidence: 99%

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Active Off-Road Seat Suspension System Using Intelligent Active Force Control

Gohari

Tahmasebi

2015

Journal of Low Frequency Noise, Vibration and Active Control

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Transmitted vibration from vehicles to driver body generates some problems in the long term. Passive and active seat suspensions are used in heavy duty vehicles to reduce unwanted vibration and prevent health problems due to oscillation. Seat suspension must minimize the driver's body displacement and acceleration to increase riding convenience. Active force control (AFC) method is a new technique which is used in active controllers and makes them more accurate. Therefore, this work represents the possibility of applying AFC strategy for an active seat suspension control to increase its robustness. An AFC-based scheme is designed and simulated in MATLAB software. In addition, artificial neural network (ANN) is integrated into the AFC loop to approximate estimated mass of the seat and human body for the proposed controller. The training of ANN with multi-layer feedforward structure is carried out using Levenberg-Marquardt learning algorithm. To evaluate the neuro-AFC control system robustness, the seat is subjected to various types of disturbances. The results of the present study illustrate that the neuro-AFC technique is computationally simple and efficient compared to the classic proportional-integral-derivative (PID) controller in suppressing undesired vibration of heavy duty vehicles' seat. The neuro-AFC scheme is found to demonstrate superior performance for various road profiles compared to pure PID controller, and it can be successfully utilized in heavy duty vehicles such as industrial and agricultural tractors.

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Section: Active Force Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Active Off-Road Seat Suspension System Using Intelligent Active Force Control

Gohari

Tahmasebi

2015

Journal of Low Frequency Noise, Vibration and Active Control

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“…These chemical sprayers are normally used on fields to spray chemicals as a means of yield manage. Chemical is applied by farmers broadly on conventional agriculture process as this method requires less labour and distribution is simple [2]. Excessive agro-chemicals are being used to improve crop production to meet the food security challenge with growing population.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nozzle Height on Spray Overlapping of JNKVV Push Type Solar and Battery Operated Sprayer

Praveen¹,

Shrivastava²

2020

CJAST

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Study was conducted at the Department of Farm Machinery and Power Engineering workshop, College of Agricultural Engineering, JNKVV, Jabalpur, Madhya Pradesh to determine the nozzle spacing and boom height of JNKVV push type solar and battery operated sprayer on the basis of width of overlapping of spraying. It is difficult to obtain the consistent width of the overlapping between adjacent nozzles for the commonly used spraying. Coefficient of variation of nozzles overlapping varies according to the spray height and nozzle spacing. Precision guidance and precision sprayer control have substantial promise to reduce input application overlap, thus saving chemicals, fuel, and time during the application process. It was found that the overlapping increases with increase in height of the boom. The results were obtained by the overlapping test for boom height and nozzle spacing, there was no overlapping obtained up to height of 80 cm. The overlapping varied from 39 cm to 43 cm and mean overlapping was 41.3 cm at nozzle height 120 cm and nozzle spacing of 60 cm. An average overlapping of nozzles varies from 29 cm to 34 cm at nozzle spacing of 70 cm and boom height of 120 cm. At the boom height of 160 cm and nozzle space of 70 cm, spray overlap fluctuates from 79 to 85 cm. The overlapping at nozzle space 80 cm varies from 19 to 22 cm and mean overlapping was 22 cm at the boom height of 120 cm and nozzle space 80 cm. The overlapping varies from 70 cm to 74 cm in nozzle series at the boom height of 160 cm and nozzle space 80 cm. As per the crop cultivation practices, adjusted the boom height and spacing to reduce overlapping of spraying.

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“…As previously mentioned, crude approximation technique and intelligent method based on IL have been used to compute the estimated inertia for the spray boom suspension system (Tahmasebi et al, 2012(Tahmasebi et al, , 2013a). In the former, through a trialand-error approach, different estimated inertia values were tried and tested in the simulation loop to find the best responses of the system.…”

Section: Active Force Control Afc Was Initially Introduced By Hewit Amentioning

confidence: 99%

“…Also, to the author knowledge, there is no available literature on the application of AFC approach to control the unwanted vibration of a spray boom directly. Two simulation works on the application of AFC scheme to control roll motion of spray boom incorporating crude approximation and IL were described by Tahmasebi et al (2012Tahmasebi et al ( , 2013a.…”

Section: Introductionmentioning

confidence: 99%

Roll Movement Control of a Spray Boom Structure Using Active Force Control with Artificial Neural Network Strategy

Tahmasebi

Rahman

Mailah

et al. 2013

Journal of Low Frequency Noise, Vibration and Active Control

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Currently, most of modern sprayers are equipped with suspensions for improving the uniformity of spray application in the field. Therefore, this paper represents the possibility of applying active force control (AFC) technique for the control of a spray boom structure undesired roll movement through a simulation analysis. The dynamic model of the spray boom was firstly defined and an AFC-based scheme controller was designed and simulated in MATLAB environment.Artificial neural network (ANN) is incorporated into the AFC scheme to tune the proportionalderivative (PD) controller gains andcompute the spray boom estimated mass moment of inertia. The training of both ANN with multi layer feed forward structure was done using Levenberg-Marquardt (LM) learning algorithm. To evaluate the AFC-ANN control system robustness, various types of disturbances and farmland terrain profileshave been used to excite the spray boom. The results of the study demonstrated that the AFC-based method offers a simple and effective computation compared to the conventional proportional-integral-derivative (PID) control technique in attenuating the unwanted spray boom roll oscillation or vibration. The AFC-ANN scheme is found to exhibit superior performance for different proposed terrain profilesin comparison to the AFC-PD and pure PD counterparts.

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Active Force Control Applied to Spray Boom Structure

Cited by 14 publications

References 13 publications

Active Off-Road Seat Suspension System Using Intelligent Active Force Control

Active Off-Road Seat Suspension System Using Intelligent Active Force Control

Effect of Nozzle Height on Spray Overlapping of JNKVV Push Type Solar and Battery Operated Sprayer

Roll Movement Control of a Spray Boom Structure Using Active Force Control with Artificial Neural Network Strategy

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