The Study for the Electronic Control Technology of the Electric Power Traction System in the Bridge/Shipping Crash Testing Laboratory

2011 ◽  
Vol 255-260 ◽  
pp. 1750-1754
Author(s):  
Xiao Yuan Zhang ◽  
Mu Xi Lei ◽  
Zheng Bao Lei ◽  
Bi Feng Ou
Keyword(s):  
Electric Power ◽  
Control Method ◽  
Crash Test ◽  
Centralized Control ◽  
Testing Laboratory ◽  
Test Report ◽  
Crash Testing ◽  
Test Flow ◽  
Traction System ◽  
Logic Relationship

The electric power traction system in the Bridge/Shipping Crash Testing Laboratory, is the foundation of the crash test between the shipping and the bridge. In order to make sure the process more quickly, stably, accurately, centralized-control method has been applied in the electric power traction system of the Bridge/Shipping Crash Testing Laboratory in The Changsha University of Science and Technology, so the test flow has been controlled and finished automatically, the test data could be collected and recorded automatically, safety alarm, protect automatically and the history data could be recorded on the real-time, the test report form could been formed automatically and the manage function will be worked and so on. The problem of complexity of the test flow, the difficulty of the induction about the logic relationship, the strong electromagnetism interfere in the big current equipment, the machine shock is strong and so on would be solved, the traction system in the crash test would be made more real and mature.

The Safety Monitoring System of Ship/Bridge Crash Testing Laboratory

2011 ◽  
Vol 255-260 ◽  
pp. 467-471 ◽  
Author(s):  
Run Ai ◽  
Mu Xi Lei ◽  
Zheng Bao Lei ◽  
Bi Feng Ou
Keyword(s):  
Monitoring System ◽  
Safety Monitoring ◽  
Field Of View ◽  
Crash Test ◽  
Alarm System ◽  
Testing Laboratory ◽  
Maximum Coverage ◽  
Actual Application ◽  
Crash Testing ◽  
Safety Monitoring System

In order to ensure the safety of the staff and the property of our laboratory, and guarantee the ship/bridge crash test conducted safely and smoothly, we adopt the safety monitoring system to supervise the whole ship/bridge crash testing laboratory and to be early warning, under the background of special application of ship/bridge crash testing laboratory. According to the actual site of crash testing laboratory, we choose the most suitable technology and operating principle to satisfy the request of ship/bridge crash testing laboratory. At the case that we do not need to increase the number of camera excessively, we can achieve the maximum coverage of the field of view by choosing the multi-function camera and designing the layout of it, and we will take advantage of the broadcasting alarm system to reach the purpose of keeping the safety of our laboratory. The results of actual application show that the staffs in the monitoring room can take the whole laboratory under their controls if we make use of this kind of safety monitoring system of ship/bridge crash testing laboratory, and we can fully protect the safety of the staff and the property of our laboratory. For the pretty good stableness and capacity of resisting disturbance, the system can greatly satisfy the request of keeping safety and early alarm.

Overall Design Method for Large Structure Crash Testing Laboratory

2011 ◽  
Vol 255-260 ◽  
pp. 1755-1759
Author(s):  
Zheng Bao Lei ◽  
Xiao Yuan Zhang ◽  
Mu Xi Lei
Keyword(s):  
Design Method ◽  
Crash Test ◽  
Large Structure ◽  
Testing Laboratory ◽  
Overall Design ◽  
Crash Testing ◽  
Vehicle Crash ◽  
Testing Technology ◽  
Success Experience ◽  
Electric Traction

In order to overcome the shortcoming in the large structure crash test such as shipping-bridge crash testing, an indoor electric traction large structure crash testing laboratory had been developed independently on the basis of the success experience in the national vehicle crash testing technology, the available traction track is 216 meters long, and the shipping-bridge crash testing, vehicle-bridge crash testing, vehicle crash testing, vehicle rolling testing, vehicle-barrier crash testing, vehicle-traffic facilities crash testing and so on could be carried out in the laboratory, the maximum traction mass could reach 18000kg, and the maximum crash speed could reach 120km/h, therefore, a effective design method for large structure crash testing laboratory had been formed. The result shows that the all meet the requirement of the pre-expected purpose.

High Speed Photography System of Vehicle/Barrier Crash Testing Laboratory

2011 ◽  
Vol 255-260 ◽  
pp. 1745-1749
Author(s):  
Yan Zhao Wang ◽  
Mu Xi Lei ◽  
Zheng Bao Lei ◽  
Jian Jun Ling
Keyword(s):  
High Speed ◽  
Test Laboratory ◽  
Crash Test ◽  
High Speed Photography ◽  
High Speed Camera ◽  
Single System ◽  
Financial Loss ◽  
Testing Laboratory ◽  
Crash Testing ◽  
Car Crash

Based on the characteristic of the shortest time, no repetition and a huge financial loss at the car crash test, High Speed Photography system plays a strictly utilitarian role. This paper mainly analyses High Speed Photography system, from the perspective of a single system we can prove the feasibility about new crash test laboratory, meanwhile, this paper describes parameters, principle of HG-100K high speed camera adopted by our laboratory, at the same time, the application of the camera is analyzed generally in the experiment of car crash test in order to proving its practicability. High speed photography system is described further in the experiment of the car crash test.

scholarly journals Model predictive control for autonomous ground vehicles: a review

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Shuyou Yu ◽  
Matthias Hirche ◽  
Yanjun Huang ◽  
Hong Chen ◽  
Frank Allgöwer
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
High Performance ◽  
Control Method ◽  
Theoretical Background ◽  
Future Research ◽  
Centralized Control ◽  
Ground Vehicles ◽  
Uncertain Environments ◽  
Autonomous Ground Vehicles

AbstractThis paper reviews model predictive control (MPC) and its wide applications to both single and multiple autonomous ground vehicles (AGVs). On one hand, MPC is a well-established optimal control method, which uses the predicted future information to optimize the control actions while explicitly considering constraints. On the other hand, AGVs are able to make forecasts and adapt their decisions in uncertain environments. Therefore, because of the nature of MPC and the requirements of AGVs, it is intuitive to apply MPC algorithms to AGVs. AGVs are interesting not only for considering them alone, which requires centralized control approaches, but also as groups of AGVs that interact and communicate with each other and have their own controller onboard. This calls for distributed control solutions. First, a short introduction into the basic theoretical background of centralized and distributed MPC is given. Then, it comprehensively reviews MPC applications for both single and multiple AGVs. Finally, the paper highlights existing issues and future research directions, which will promote the development of MPC schemes with high performance in AGVs.

Finite Element Simulation of a Strong-Post W-Beam Guardrail System

SIMULATION ◽  
2002 ◽  
Vol 78 (10) ◽  
pp. 587-599 ◽  
Author(s):  
Ali O. Atahan
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Full Scale ◽  
Nonlinear Finite Element ◽  
Crash Test ◽  
Original Design ◽  
Dynamic Interactions ◽  
Crash Testing ◽  
Element Simulation ◽  
Test Requirements

Computer simulation of vehicle collisions has improved significantly over the past decade. With advances in computer technology, nonlinear finite element codes, and material models, full-scale simulation of such complex dynamic interactions is becoming ever more possible. In this study, an explicit three-dimensional nonlinear finite element code, LS-DYNA, is used to demonstrate the capabilities of computer simulations to supplement full-scale crash testing. After a failed crash test on a strong-post guardrail system, LS-DYNA is used to simulate the system, determine the potential problems with the design, and develop an improved system that has the potential to satisfy current crash test requirements. After accurately simulating the response behavior of the full-scale crash test, a second simulation study is performed on the system with improved details. Simulation results indicate that the system performs much better compared to the original design.

scholarly journals A Speed Control Method for Underwater Vehicle under Hydraulic Flexible Traction

2015 ◽  
Vol 2015 ◽  
pp. 1-16
Author(s):  
Yin Zhao ◽  
Ying-kai Xia ◽  
Ying Chen ◽  
Guo-Hua Xu
Keyword(s):  
Control System ◽  
Control Theory ◽  
Control Method ◽  
Sliding Mode ◽  
Variable Structure ◽  
Speed Control ◽  
Underwater Vehicle ◽  
Vehicle Speed ◽  
Sliding Mode Variable Structure ◽  
Traction System

Underwater vehicle speed control methodology method is the focus of research in this study. Driven by a hydraulic flexible traction system, the underwater vehicle advances steadily on underwater guide rails, simulating an underwater environment for the carried device. Considering the influence of steel rope viscoelasticity and the control system traction structure feature, a mathematical model of the underwater vehicle driven by hydraulic flexible traction system is established. A speed control strategy is then proposed based on the sliding mode variable structure of fuzzy reaching law, according to nonlinearity and external variable load of the vehicle speed control system. Sliding mode variable structure control theory for the nonlinear system allows an improved control effect for movements in “sliding mode” when compared with conventional control. The fuzzy control theory is also introduced, weakening output chattering caused by the sliding mode control switchover while producing high output stability. Matlab mathematical simulation and practical test verification indicate the speed control method as effective in obtaining accurate control results, thus inferring strong practical significance for engineering applications.

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