scholarly journals Design and Simulation of the Operating Speed Regulation Algorithm of Plot Cabbage Seed Combine Harvester

2020 ◽  
Vol 11 ◽  
pp. 160-169
Author(s):  
Mao Hanping ◽  
Wang Jiahui ◽  
Xing Gaoyong ◽  
Zuo Zhiyu ◽  
Li Qinglin
Keyword(s):  
Association Rules ◽  
Sql Server ◽  
Forward Speed ◽  
Large Delay ◽  
Pid Algorithm ◽  
Speed Regulation ◽  
Control Scheme ◽  
Cabbage Seed ◽  
Combine Harvester ◽  
Feed Volume

Aiming at the problems of the single control scheme, the few aspects of monitoring and diagnosis, and the large delay time of the plot combine harvester, this paper designs the forward speed control algorithm of the plot Chinese cabbage seed harvester. This paper studies the theory of association rules, has used SQL Server to build a database including the job parameters of the main monitoring objects, and has mined the association rules between the job parameters and the feed amount through Analysis Service. Combining the knowledge of association rules and ordinary fuzzy PID algorithm, the article has built a model and performed simulation verification. The results show that the algorithm can adjust the forward speed reasonably and quickly when the feed volume increases.

scholarly journals Cutting speed follow-up adjusting system of bidirectional electric drive side cutter for rape combine harvester

2020 ◽  
Vol 103 (3) ◽  
pp. 003685042093572 ◽  
Author(s):  
Zhuohuai Guan ◽  
Chongyou Wu ◽  
Ying Li ◽  
Senlin Mu ◽  
Lan Jiang
Keyword(s):  
Electric Drive ◽  
Cutting Speed ◽  
Speed Ratio ◽  
Forward Speed ◽  
Pid Algorithm ◽  
Speed Error ◽  
Average Loss ◽  
Combine Harvester ◽  
Speed Response

In rape combine harvester, side cutter must be equipped to cut off tangled rapeseed twigs. Inappropriate cutting speed would increase the repeated cutting and missing cutting of side cutter, which lead to serious header loss. In allusion to the problems mentioned above, bidirectional electric drive side cutter and a cutting speed follow-up adjusting system were proposed. The kinematic law of side cutter blades was analyzed. The trajectory, velocity, and acceleration of the two blades were the same, but the phase difference is π. Numerical simulation of cutting areas at different cutting speed ratios was carried out and the best cutting speed ratio was determined to be 1.1. Cutting speed follow-up adjusting system was designed based on matching relationship between combine harvester forward speed and side cutter cutting speed. Cutting speed follow-up adjusting system was designed with proportional–integral–derivative (PID) algorithm. The control parameters were determined to be Kp = 1.3, Ki = 4.3, Kd = 0.007. Simulation showed that the maximum overshoot of the system was 4.3%, steady-state error was 0.24%, and the rise time was 0.036 s. The cutting speed follow-up adjusting system was applied to the 4LZ-6T-type rape combine harvester. Experimental results showed that the side cutter cutting speed error was within 1.5%. When forward speed changed, the cutting speed response delay time was 1.5 s. The rape combine harvester header average loss was 2.96% and side cutter average loss was 0.81%. Compared to the fixed speed cutting, header loss was reduced by 14.05% and side cutter loss was reduced by 34.76%. The research can reduce the loss of rapeseed combine harvester and provide theoretical basis for the design of rapeseed combine harvester.

scholarly journals Researches on Grain Harvesting Machines

1970 ◽  
Vol 66 (1) ◽  
Author(s):  
Mariana DUMITRU
Keyword(s):  
Forward Speed ◽  
Combine Harvester ◽  
Made In ◽  
Main Factor

The purpose of the paper is to present some researches made on the mechanisms of the combine for cutting, feeding and threshing. There are presented the floating cutter bar, the combine with a spike-tooth cylinder and rotary separation, the combine with dual threshing and separating rotors. Some of the adjustments are made on the finger sensors for cutter bar. One of the most important adjustment is that made in order to reduce harvest loss. Forward speed is one of the main factor in optimizing the performance of a combine harvester. The method used in the paper is that of direct observing and measuring made on different component parts of combines.

Influence of Combine Harvester Forward and Reel Speeds on Wheat Harvesting Losses in Gezira Scheme (Sudan)

2021 ◽  
Vol 2 (2) ◽  
Author(s):  
Omer A. Abdalla ◽  
Mohamed. H. Dahab ◽  
Mukhtar M. Musa ◽  
Eltayeb S. N. Babikir
Keyword(s):  
Technology Transfer ◽  
Total Yield ◽  
Forward Speed ◽  
Split Plot ◽  
Combine Harvester ◽  
Plot Design

The present study was conducted at the demonstration farm of Massaed Technology Transfer Center, Gezira State, during 2016/2017, to evaluate the effect of combine harvester forward and reel speed on wheat harvesting losses (total header, processing and total machine losses). Three combine harvester forward speeds (4, 5 and 6 km/h), and three reel speeds (25, 35 and 45 rpm) were used in the experiment, which was arranged in a split plot design with three replications. The results showed that forward speed 4 km/h with reel speed 25 rpm recorded the lowest total header losses (31.8 kg/ha) while the highest losses (90.1 kg/ha) was recorded by the forward speed 6 km/h and reel seed 25 rpm. The lowest processing losses was obtained from the forward speed 6 km/h with reel speed 25 rpm (13.2 kg/ha) while the highest was recorded by the forward speed 4 km/h with the reel speed 45 rpm (38.2 kg/ha). Forward speed 4 km/h with reel speed 25 rpm recorded the lowest total machine losses (56.7 kg/ha) which represents 9.5% of the total yield as compared to 118.0 kg/ha which represents 19.67% of the total yield recorded by the same speed with 45 rpm reel speed. It was concluded that the forward speed 4 km/h with reel speed 25 rpm was appropriate for reducing combined wheat harvesting losses under Gezira Scheme conditions.

Optimization of operational parameters for mechanized harvesting of mung-bean (Vignaradiata (L.) Wilczek) with combine harvester

2019 ◽  
Author(s):  
Baldev Dogra ◽  
Dinesh Kumar ◽  
Ritu Dogra ◽  
T.S. Bains ◽  
G.S Manes
Keyword(s):  
Mung Bean ◽  
Rear Side ◽  
Forward Speed ◽  
Operational Parameters ◽  
Peripheral Speed ◽  
Crop Varieties ◽  
Grain Damage ◽  
Combine Harvester ◽  
Crop Parameters ◽  
Bean Crop

The present study was aimed at optimizing operational and crop parameters influencing the mechanized harvesting and threshing of mung-bean crop with combine harvester. Two varieties of summer mung-bean SML-668 and SML-832 and one variety of kharif mung-bean ML-818 were selected for the study. Concave clearance was kept as 25 mm at front side and 10 mm from rear side. The height of cut the crop ranged from 8-9.5 cm. Threshing efficiency was more than 98% at cylinder peripheral speeds C3 and C4 in all varieties except SML-832. The percent grain damage was higher for higher cylinder peripheral speed and lower for higher forward speed. The grain damage ranged from 1.54 – 3.22 percent for C1, C2 and C3 cylinder peripheral speed in all crop varieties. Peripheral speed of 18.91 m/s and forward speed of 1.5 km/h was found to be optimum for harvesting mung-bean with combine harvester for all crop varieties.

Optimization of operational parameters for mechanised harvesting of pigeon-pea (Cajanus cajan) with combine harvester

2019 ◽  
Author(s):  
Baldev Dogra ◽  
Dinesh Kumar ◽  
Ritu Dogra ◽  
Inderjit Singh ◽  
G.S. Manes
Keyword(s):  
Pigeon Pea ◽  
Rear Side ◽  
Forward Speed ◽  
Operational Parameters ◽  
Sun Drying ◽  
Peripheral Speed ◽  
Crop Varieties ◽  
Grain Damage ◽  
Combine Harvester ◽  
Crop Parameters

Pigeon-pea is very thick and woody stem crop, therefore the harvesting and threshing of this crop is a drudgery and time consuming. At present in India pigeon-pea is harvested manually with sickle and after that the crop is left in the field in the form of heaps for 7-10 days for sun drying. After sun drying the crop is threshed with suitable thresher or beating with stick etc. Lack of mechanization of harvesting and threshing operation is one of the limitations to the increase production and productivity of pigeon-pea. Therefore, the present study was aimed at optimizing operational and crop parameters influencing the mechanized harvesting and threshing of pigeon-pea crop with combine harvester. PAU-881, AL-1856, AL-1817 and AL-1811 of extra-short duration pigeon-pea were selected for the study. The moisture content of crop and grain varied from 38 to 48% and 22 to 25% on wet basis respectively for crop varieties AL-1817 and AL-1811 and it was 48 to 53% and 24 to 27% on wet basis respectively for crop varieties PAU-881 and AL-1856. Concave clearance was kept as 16 mm at front side and 7 mm from rear side. Threshing efficiency was more than 98% at cylinder peripheral speed of 26.61 m/s and 34.85 m/s in all varieties except PAU-881. The percent grain breakage was higher for higher cylinder peripheral speed and lower for higher forward speed. The grain damage was below 1% for 23.85m/s, 26.61 m/s and 34.85 m/s cylinder peripheral speed in all crop varieties except AL-1811. The optimum values of peripheral velocity and forward speed of combine harvester harvesting pigeon-pea were 26.61 m/s and 2.0 km/h for all selected varieties.

Study on Combine Harvester Speed Control Based on Optimum Threshing Power Consumption Model

2011 ◽  
Vol 130-134 ◽  
pp. 1911-1914 ◽  
Author(s):  
Du Chen ◽  
Feng Kang ◽  
Qing Yuan Zhu ◽  
Shu Mao Wang
Keyword(s):  
Power Consumption ◽  
Feeding Rate ◽  
High Efficiency ◽  
Speed Control ◽  
Forward Speed ◽  
Rate Condition ◽  
Hydraulic Unit ◽  
Wide Range ◽  
Combine Harvester ◽  
Consumption Model

Combine harvester have to be operated in a wide range of field condition which may induce varying feeding rate. Forward speed is a main variable to control the feeding rate of combine harvester for high efficiency. In this study a control strategy based on optimum threshing power consumption model was developed and integrated into a speed control system for combine harvester automation. A conventional self-propelled combine harvester (Xinjiang-II) was equipped with multiple sensors to collect online information, including forward speed, threshing drum torque and speed. Forward speed was then adjusted by an electric-hydraulic unit based on designed PID controller to achieve an optimum range of threshing power consumption. Field test was conducted to evaluate the performance of the controller under variable feeding rate condition. From obtained results, the controller can improve the efficiency of tested machine during field operation.

scholarly journals Speed Regulation Control for an Integrated Motor-Transmission System under External Disturbances

2020 ◽  
Vol 11 (3) ◽  
pp. 53
Author(s):  
Wei Huang ◽  
Jianfeng Huang ◽  
Chengliang Yin
Keyword(s):  
Controller Design ◽  
Sliding Mode ◽  
Motor Speed ◽  
External Disturbances ◽  
Speed Regulation ◽  
Speed Tracking ◽  
Powertrain System ◽  
Control Scheme ◽  
Combined Control ◽  
Practical Engineering

Precise motor speed regulation control is essential to achieve a good gear shifting quality of the integrated motor-transmission (IMT) system, in which the relative speed between outgoing shaft and the gearwheel to be engaged can be eliminated directly through regulation of the motor speed. The speed regulation control confronts the difficulty that there exist external disturbances on the motor shaft, like the unknown load torque arised from bearing friction, oil shearing and oil churning, etc. To deal with these disturbances, a robust speed regulation controller combined a nominal proportional control and integral sliding mode control is proposed. The former is designed to achieve a good speed tracking performance and the latter provides functionality of disturbances rejection. The effects of different controller parameters for the robust controller design are assessed via simulations. Moreover, to verify the effectiveness of the combined control scheme in practical engineering use, experiments are carried out on a test bench with a real IMT powertrain system. Results indicate that the proposed approach can attain a rapid and smooth speed regulation process with a simple controller structure and good robustness.

The Research of Digital Double Close-Loop DC Speed Regulation System Based on ATMega8

2011 ◽  
Vol 328-330 ◽  
pp. 1828-1831
Author(s):  
Jian Hui Wang ◽  
Li Zhang ◽  
Yun Long
Keyword(s):  
Voltage Regulation ◽  
Experimental Results ◽  
Tracking Performance ◽  
Regulation System ◽  
Motor Speed ◽  
Outer Loop ◽  
Current Feedback ◽  
Speed Regulation ◽  
Control Scheme

The design of Digital Double Close-loop DC Speed Regulation System which we introduce in this article is based on the numeric control scheme, and using ATMega8 as the main controller, also with PI arithmetic, so as to construct a double close-loop DC Speed Regulation System with inner loop of current feedback and outer loop of speed feedback. The approach of motor speed regulation is through the voltage regulation. Experimental results show that the system has robustness, fast and good tracking performance.

The Modeling and Simulation of DFIM Based on Auto Disturbance Rejection Controller

2012 ◽  
Vol 510 ◽  
pp. 106-111
Author(s):  
Zhi Qiang Zhang ◽  
Ya Ping Zhuang ◽  
Lin Gang Yu ◽  
Zheng Guo Wu
Keyword(s):  
Disturbance Rejection ◽  
Setting Time ◽  
Induction Machine ◽  
Regulation System ◽  
Speed Regulation ◽  
Speed Tracking ◽  
Tracking Differentiator ◽  
Time Simulation ◽  
Control Scheme ◽  
Connection System

In order to solve the coupling of rotor current of d axis and q axis, a new kind of control scheme for double-fed induction machine (DFIM) speed regulation system is proposed based on the theory of auto disturbance rejection controller (ADRC). The ADRC is composed of three parts: tracking-differentiator (TD), extended state observer (ESO) and nonlinear state feedback controller (NSFC). In the ADRC scheme, the coupling of rotor current is regarded as the inner disturbance of DFIM, inputting this disturbance to the input port of the speed regulation system by the feedforward compensation, the speed regulation system can change to the simple integral series connection system or simple linear system. This controller can realize decoupling of rotor current of d axis and q axis, obtaining a good speed tracking performance with small overshoot and fast setting time. Simulation results indicate the rationality and validity of the ADRC.

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