The Application of Optimising Control to an Hydraulic Drive

1973 ◽  
Vol 6 (2) ◽  
pp. 75-86
Author(s):  
G K Steel
Keyword(s):  
Control System ◽  
Hydraulic Drive ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Periodic Perturbation ◽  
Control Action ◽  
Test Results ◽  
Extremum Point ◽  
Fundamental Limitations ◽  
Action Analysis

An extremum control system has been designed to maximise the transmission efficiency of an hydraulic drive. The system is of the type which use a periodic perturbation of the control signal to generate the control action. Analysis of the system shows that an optimum choice of parameters may be made to maximise the rate of tracking of a moving extremum point. A system designed on these principles has been applied to a typical transmission system and test results are given. Some fundamental limitations of the performance of this type of control system are revealed.

Efficiency Modeling and Experimental Verification of Minicar Transmission System

2013 ◽  
Vol 288 ◽  
pp. 30-36
Author(s):  
Wang Ping Wang
Keyword(s):  
Transmission Efficiency ◽  
Transmission System ◽  
Test Results ◽  
Factors Affecting ◽  
Design And Optimization ◽  
Speed Range ◽  
Loss Models ◽  
Efficiency Test ◽  
Relative Errors ◽  
Input Torque

Through the analysis of factors affecting the efficiency of auto transmission system, the power loss models of all parts of the transmission system were established, and the formula of the transmission efficiency was obtained. On the basis of formulating the minicar transmission efficiency test standard, the transmission system was tested. Test results indicated that the transmission efficiency values which obtained theoretically by calculation were in reasonable agreement with experimental results, the relative errors were less than 6%，especially in commonly used input torque and input speed range. This model provides theory basis for the design and optimization of auto transmission system.

scholarly journals Optimal design of high efficiency double helical gear based on dynamics model

2021 ◽  
Vol 3 (8) ◽  
Author(s):  
Fengxia Lu ◽  
Xuechen Cao ◽  
Weiping Liu
Keyword(s):  
Dynamic Model ◽  
High Efficiency ◽  
Bending Strength ◽  
Sliding Friction ◽  
Elastohydrodynamic Lubrication ◽  
Optimization Method ◽  
Transmission Efficiency ◽  
Helical Gear ◽  
Transmission System ◽  
Vibration Displacement

AbstractA 16-degree-of-freedom dynamic model for the load contact analysis of a double helical gear considering sliding friction is established. The dynamic equation is solved by the Runge–Kutta method to obtain the vibration displacement. The method combines the friction coefficient model based on the elastohydrodynamic lubrication theory with the dynamic model, which provides a theoretical basis for the calculation of the power loss of the transmission system. Moreover, the sensitivity analysis of the parameters that affect the transmission efficiency is carried out, and an optimization method of meshing efficiency is proposed without reducing the bending strength of the gears. This method can directly guide the design of the double helical gear transmission system.

Design of the Automatic Guided Vehicle Control System Applied to Automotive Logistics

2014 ◽  
Vol 644-650 ◽  
pp. 381-384
Author(s):  
Xin Zhang ◽  
Hao Zhou ◽  
Guo Song Liu
Keyword(s):  
Control System ◽  
Absolute Error ◽  
Vehicle Control ◽  
Test Results ◽  
Circuit Performance ◽  
Automatic Driving ◽  
Automatic Guided Vehicle ◽  
Distribution Logistics ◽  
Auto Parts ◽  
The Cost

In order to improve the efficiency of auto parts distribution logistics, to lower the cost of auto production in transportation logistics, and to reduce accidents, in this paper it is designed that an automatic guided vehicle control system to replace the manned tractors in the distribution sites. The system is equipped with an infrared homing device that can ensure the automated guided vehicle (AGV) along a predetermined route automatic driving at a given distribution information, without the needs to manually guided. Test results show that the circuit performance of AGV control system is stable to ensure the accuracy of the tracking in the practical application, and the mean absolute error of the tracking is less than 0.04m.

scholarly journals Dynamic Analysis and Control of an Automatic Transmission for Start-Stop Function and Efficiency Improvement

2015 ◽  
Vol 2015 ◽  
pp. 1-13
Author(s):  
Yang Liu ◽  
Shuhan Wang ◽  
Peng Dong ◽  
Xiangyang Xu
Keyword(s):  
Control Strategies ◽  
Automatic Transmission ◽  
Simulation Method ◽  
Transmission Efficiency ◽  
The Novel ◽  
Test Results ◽  
Test Environment ◽  
Pump System ◽  
Oil Pump ◽  
And Control

An electric oil pump (EOP) was integrated into the hydraulic system and an automatic transmission (AT) mechanical oil pump (MOP) was downsized. These processes were performed to combine a start-stop function with the AT and further improve the transmission efficiency. Furthermore, this study established a dynamics model of power loss and leakage of an 8-speed AT; a flow-based control algorithm of the EOP was then developed to realize the start-stop function and support the MOP to meet the flow requirement of the system. Based on a driving simulation method, sizes of the MOP and EOP that ensured optimal fuel economy were selected. A control strategy for the starting clutch was also developed to minimize the starting delay of the test vehicle. A test environment on a rig and prototype vehicle was established to verify the feasibility of the proposed control strategies. The test results indicated that the transmission functioned favorably with the novel two-pump system presented, and a quick and smooth starting performance was achieved when the engine was restarted. The findings in this study are extremely valuable for forward designs of an AT for realizing start-stop function and improving efficiency.

scholarly journals The Study of Interoperability Test for Onboard Control System in Railway Condition

2011 ◽  
Vol 2-3 ◽  
pp. 785-790
Author(s):  
Jong Hyen Baek ◽  
Yong Kyu Kim ◽  
Jae Ho Lee ◽  
Hyen Jung Jo
Keyword(s):  
Control System ◽  
Control Systems ◽  
Data Systems ◽  
Test Results ◽  
Simulation Environment ◽  
Train Control ◽  
Interoperability Test ◽  
Critical Characteristics ◽  
Site Test ◽  
Onboard Equipment

For the purpose of improving the future domestic train control systems and securing interoperability, according to the global development trends of train control systems, it is presented that the test results of interoperability between wayside train control systems installed in existed line, and the onboard train control system. Due to the safety-critical characteristics of train systems, the site test in the section where the wayside equipment is installed may lead to a danger against safety. Therefore, by way of constructing a simulation environment of train control systems, the T/R data systems of the equipment for interoperability are confirmed and the interoperability test are obtained by applying these systems to onboard equipment.

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