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

2020 ◽  
Vol 10 (8) ◽  
pp. 2930 ◽  
Author(s):  
Wan-Soo Kim ◽  
Yong-Joo Kim ◽  
Yeon-Soo Kim ◽  
Seung-Yun Baek ◽  
Seung-Min Baek ◽  
...  
Keyword(s):  
Control System ◽  
High Efficiency ◽  
Position Control ◽  
Experimental Tests ◽  
Manual Transmission ◽  
Reduction Gear ◽  
Shift Control ◽  
Automated Manual Transmission ◽  
Agricultural Tractors ◽  
Agricultural Tractor

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.

Motor position control algorithm for an automated manual transmission of the agricultural tractor

2015 ◽  
Vol 229 (18) ◽  
pp. 3341-3349 ◽  
Author(s):  
Jihwan Kim ◽  
Hyeongcheol Lee
Keyword(s):  
Control Algorithm ◽  
Position Control ◽  
Manual Transmission ◽  
Linear Quadratic ◽  
Luenberger Observer ◽  
Linear Quadratic Tracking ◽  
Hardware Configuration ◽  
Automated Manual Transmission ◽  
Quadratic Tracking ◽  
Agricultural Tractor

This paper presents a motor position control algorithm for an automated manual transmission (AMT) of the agricultural tractor, based on modified linear quadratic tracking (LQT). In this paper, the modified LQT is derived from the conventional LQT by applying the Luenberger observer in order to design an output feedback controller. A dynamic model of the actuator is derived to represent characteristics of the worm geared DC motor and the proposed control algorithm is applied and tuned with the model. The proposed position control algorithm of the worm geared motor using the modified LQT can improve disturbance rejection performance without changing the hardware configuration of the AMT. The simulation results show the validity of the proposed control algorithm.

Mobile Robot Hydraulic Drive Energy-Saving Circuit Simulation Based on the High-Frequency Switching Valve

2013 ◽  
Vol 278-280 ◽  
pp. 568-575
Author(s):  
Jun Zhang ◽  
Yong Xue ◽  
Jun Hong Yang ◽  
Zhuo Wang ◽  
Jian Zhong Shang
Keyword(s):  
Control System ◽  
Mobile Robot ◽  
Energy Saving ◽  
High Frequency ◽  
High Efficiency ◽  
Position Control ◽  
Circuit Simulation ◽  
Hydraulic Drive ◽  
Switching Valve ◽  
System Pressure

Due to the constraints from weight, volume and other various factors, mobile robot hydraulic drive system uses single pump and multi-actuator hydraulic drive structure. The high efficiency of the structure is the key to the successful application in hydraulic robot. The traditional servo valve control system possesses good position control ability, but it has the problem of bilateral throttling loss and great valve port pressure decrease. This paper proposes a hydraulic position control system based on high-frequency switching valve, which controls valve port opening and closing, through the PWM signals, so as to control flows, guarantee the position control precision as well as reduce the required system pressure, thereby achieving the effect of energy conservation. By using AMESim and Adams co-simulation and simulating the real stress environment, the feasibility of energy-saving in high frequency switching valve circuit has been verified.

Modified Generalized Predictive Control of Networked Systems With Application to a Hydraulic Position Control System

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
Bo Yu ◽  
Yang Shi ◽  
Ji Huang
Keyword(s):  
Control System ◽  
Predictive Control ◽  
Position Control ◽  
Networked Control Systems ◽  
Experimental Tests ◽  
Necessary Condition ◽  
Generalized Predictive Control ◽  
Prediction Control ◽  
Position Control System ◽  
Control Sequences

This paper is concerned with the design of networked control systems using the modified generalized predictive control (M-GPC) method. Both sensor-to-controller (S-C) and controller-to-actuator (C-A) network-induced delays are modeled by two Markov chains. M-GPC uses the available output and prediction control information at the controller node to obtain the future control sequences. Different from the conventional generalized predictive control in which only the first element in control sequences is used, M-GPC employs the whole control sequences to compensate for the time delays in S-C and C-A links. The closed-loop system is further formulated as a special jump linear system. The sufficient and necessary condition to guarantee the stochastic stability is derived. Simulation studies and experimental tests for an experimental hydraulic position control system are presented to verify the effectiveness of the proposed method.

Composite control system of hybrid-driven mid-altitude airship

2017 ◽  
Vol 122 (1248) ◽  
pp. 173-204
Author(s):  
L. Chen ◽  
Q. Dong ◽  
G. Zhang ◽  
D. Duan
Keyword(s):  
Control System ◽  
Attitude Control ◽  
High Speed ◽  
High Efficiency ◽  
Position Control ◽  
Controller Design ◽  
Weight Ratio ◽  
Composite Control ◽  
Primary Object ◽  
Aerodynamic Surfaces

ABSTRACTIn general, an airship is equipped with hybrid-heterogeneous actuators: the aerodynamic surfaces, the vectored propellers and the buoyant ballonets. The aerodynamic surfaces have high efficiency in attitude control at high speed. However, vectored propellers are also introduced here for attitude control under the special working condition of low airspeed. Due to the lower thrust-to-weight ratio, the composite control of hybrid-heterogeneous actuators is the primary object in controller design for an airship. In composite attitude control, first the attitude moment allocation between aerodynamic control surfaces and vectored propellers is designed according to different dynamic airspeed, to achieve the smooth motion transition from low to high airspeed, then the weighted generalised inverse (WGI) is used to design the reconfigurable actuator allocation among the homogeneous multi-actuators, where the authority of every actuator can be decided by setting the corresponding value of the weight matrix, thus the control law is unchanged under different actuator configurations. Taking the mid-altitude airship as an example, the simulations of position control, trace tracking and altitude control are provided. Simulation results demonstrate that the attitude moments allocation obtains moment distribution between the aerodynamic surfaces and the vectored propellers under different airspeeds; the reconfigurable actuator allocation achieves a good distribution and reconfiguration among homogeneous actuators, thereby enhancing the reliability of the control system.

Sign in / Sign up

Export Citation Format

Share Document