Simulation of components of a power shuttle transmission system for an agricultural tractor

Raikwar, Satyam; Tewari, V.K.; Mukhopadhyay, Sudipta; Verma, Cmde. R.B.; Rao, M. Sreenivasulu

doi:10.1016/j.compag.2015.03.006

Cited by 42 publications

(22 citation statements)

References 5 publications

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“…Thus, this case was excluded from the measurement. The total duration time (i.e., shifting time) of the developed AMT system was confirmed to be applicable by comparing with the results of previous studies; for example, AMT in an automotive car achieved 2.62 s [35]; power shift, 3.00 s [21]; and power shuttle, 2.90 s [20]. Table 6.…”

Section: Performance Evaluation Of F/r Automatic Shiftingsupporting

confidence: 60%

“…For frequent shifting, operations such as shift levers and clutch pedal operations cause inconvenience to farmers and lower work efficiency. As an alternative, in the agricultural tractor field, some studies have been carried out on using a power shuttle [18][19][20][21][22][23] or power shift [24][25][26] capable of automatic F/R transmission using a hydraulic system. Li et al [26] designed and proposed an automatic gear-shifting system capable of semi-automatic shifting with power shift transmission.…”

Section: Introductionmentioning

confidence: 99%

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Development of Control System for Automated Manual Transmission of 45-kW Agricultural Tractor

Kim

et al. 2020

Applied Sciences

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This study aims to develop and evaluate an automated manual transmission (AMT) for agricultural tractors with high efficiency and high convenience by using electric actuators. An AMT system to control manual-type shuttle gearboxes and transmissions for tractors is developed by adding a shuttle shifting actuator, a clutch actuator, and a control system to a conventional manual transmission (MT). The clutch actuator is designed using an electric motor and a reduction gear. The AMT control system is developed and experimental tests are conducted to evaluate the performance of the AMT. The results of the performance of the actuator position control demonstrate that the shuttle shifting actuator and clutch actuator are controlled appropriately, achieving a maximum overshoot of less than 5% and 0%, a settling time of less than 0.500 s and 1.50 s, and a steady-state error of less than 1% and 1%, respectively. The performance of the automatic forward and reverse control demonstrates a shift control time of less than 2.50 s and target revolutions per minute (RPM) reaching time of less than 3.00 s. Thus, AMT systems for tractors can be easily developed by applying shuttle shifting actuators, clutch actuators, and a control system to conventional manual transmissions.

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Section: Performance Evaluation Of F/r Automatic Shiftingsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Development of Control System for Automated Manual Transmission of 45-kW Agricultural Tractor

Kim

et al. 2020

Applied Sciences

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“…Figure 5 presents the pump control motor system with the electrohydraulic proportional closed-loop circuit. Hydraulic speed regulation mechanism is composed by four parts: variable displacement pump-fixed displacement motor system, control system of pump, valve assembly, and slippage and washing system [31,32]. The simplified dynamic model of hydraulic speed regulation mechanism is shown in Figure 6.…”

Section: (3) Single-shaft Rotation Of Hydromechanical Transmissionmentioning

confidence: 99%

Study on the Control Strategy of Shifting Time Involving Multigroup Clutches

Zhu

Xiang

Pan

et al. 2016

Mathematical Problems in Engineering

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This paper focuses on the control strategy of shifting time involving multigroup clutches for a hydromechanical continuously variable transmission (HMCVT). The dynamic analyses of mathematical models are presented in this paper, and the simulation models are used to study the control strategy of HMCVT. Simulations are performed in SimulationXplatform to investigate the shifting time of clutches under different operating conditions. On this basis, simulation analysis and test verification of two typical conditions, which play the decisive roles for the shifting quality, are carried out. The results show that there are differences in the shifting time of the two typical conditions. In the shifting process from the negative transmission of hydromechanical ranges to the positive transmission of hydromechanical ranges, the control strategy based on the shifting time is switching the clutches of shifting mechanism firstly and then disengaging a group of clutches of planetary gear mechanism and engaging another group of the clutches of planetary gear mechanism lastly. In the shifting process from the hydraulic range to the hydromechanical range, the control strategy based on the shifting time is switching the clutches of hydraulic shifting mechanism and planetary gear mechanism at first and then engaging the clutch of shifting mechanism.

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“…Manzone [17] adopted a proportional valve to a hydraulic transmission system for mounting the trailers, in order to protect from damage during operations. The proportional valve was also adapted to the power shuttle system of a tractor in order to control the pressure for clutch actuation [18]. He also reported that the proportional valve actually performed so as to control the engage and disengage of the clutch.…”

Section: Introductionmentioning

confidence: 99%

Effects of Temperatures and Viscosity of the Hydraulic Oils on the Proportional Valve for a Rice Transplanter Based on PID Control Algorithm

Siddique

Kim

et al. 2020

Agriculture

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This study was conducted to develop a proportional-integral-derivative (PID) control algorithm considering viscosity for the planting depth control system of a rice transplanter using various hydraulic oils at different temperatures and to evaluate the performance of the control algorithm, and compare the performance of the PID control algorithm without considering viscosity and considering viscosity. In this study, the simulation model of the planting depth control system and a PID control algorithm were developed based on the power flow of the rice transplanter (ERP60DS). The primary PID coefficients were determined using the Ziegler-Nichols (Z-N) second method. Routh’s stability criteria were applied to optimize the coefficients. The pole and double zero points of the PID controller were also applied to minimize the sustained oscillations of the responses. The performance of the PID control algorithm was evaluated for three ISO (The International Organization for Standardization) standard viscosity grade (VG) hydraulic oils (VG 32, 46, and 68). The response characteristics were analyzed using statistical method (ANOVA) and Duncan’s multiple range test (DMRT) at a significant level of 0.05 were performed through the statistical software SPSS. The results show that the control algorithm considering viscosity is able to control the pressure of the proportional valve, which is associated with the actuator displacement for various types of hydraulic oils. It was noticed that the maximum pressure was 15.405 bars at 0, 20, 40, 60, 80, and 100 °C for all of the hydraulic oils. The settling time and steady-state errors were 0.45 s at 100 °C for VG 32 and 0% for all of the conditions. The maximum overshoots were found to be 17.50% at 100 °C for VG 32. On the other hand, the PID control algorithm without considering viscosity could not control the planting depth, because the response was slow and did not satisfy the boundary conditions. The PID control algorithm considering viscosity could sufficiently compensate for the nonlinearity of the hydraulic system and was able to perform for any of temperature-dependent viscosity of the hydraulic oils. In addition, the rice transplanter requires a faster response for accurately controlling and maintaining the planting depth. Planting depth is highly associated with actuator displacement. Finally, this control algorithm considering viscosity could be helpful in minimizing the tilting of the seedlings planted using the rice transplanter. Ultimately, it would improve the transplanter performance.

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Simulation of components of a power shuttle transmission system for an agricultural tractor

Cited by 42 publications

References 5 publications

Development of Control System for Automated Manual Transmission of 45-kW Agricultural Tractor

Development of Control System for Automated Manual Transmission of 45-kW Agricultural Tractor

Study on the Control Strategy of Shifting Time Involving Multigroup Clutches

Effects of Temperatures and Viscosity of the Hydraulic Oils on the Proportional Valve for a Rice Transplanter Based on PID Control Algorithm

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