Simulation model of an electrohydraulic-actuated double-clutch transmission vehicle: modelling and system design

2017 ◽  
Vol 55 (12) ◽  
pp. 1865-1883 ◽  
Author(s):  
J. Schoeftner ◽  
W. Ebner
Keyword(s):  
Simulation Model ◽  
System Design ◽  
Double Clutch Transmission

Construction of Multi-Domain System Simulation Model for Trade Studies in System Design Considering Multiple Scenes

2019 ◽  
Author(s):  
Kazuya Oizumi ◽  
Keita Ishida ◽  
Yoshihiro Uchibori ◽  
Kazuhiro Aoyama
Keyword(s):  
Simulation Model ◽  
System Design ◽  
Systems Engineering ◽  
System Simulation ◽  
Cognitive Model ◽  
Simulation Models ◽  
Modelling Method ◽  
Variable Transmission ◽  
Physical Phenomena ◽  
Model Based Systems Engineering

Abstract As a product is sold globally, usages of the product have much wider variety. Thus, a product needs to be designed considering multiple scenes. To certify that the product performs properly in any scene, industries started to apply Model Based Systems Engineering (MBSE). Whereas multi-domain system simulations are regarded as a prominent approach for the system design of a product, construction of model depends on knowledge and sense modelers. This paper proposes a modelling method to construct appropriate multi-domain system simulation models while reducing dependencies to senses of modelers. The proposed method comprises two parts. First, significant tradeoffs to be studied by the simulation are specified. Second, features of simulation models are deliberated for specified tradeoffs. To specify significant tradeoffs, product and scenes where the product is used are integrated into a model. Further, to deliberate features of simulation model, cognitive model of physical phenomena in a product is employed as well. The proposed method was applied to the development of continuously variable transmission to verify its validity.

Aircraft test of engineered material arresting system

2018 ◽  
Vol 90 (1) ◽  
pp. 229-236
Author(s):  
Hong-Yu Yao ◽  
Xiang-Jun Kong ◽  
Ya-Jie Shi ◽  
Xian-Bo Xiao ◽  
Ning-Ning Le
Keyword(s):  
Simulation Model ◽  
System Design ◽  
Design Methodology ◽  
Field Tests ◽  
Test Results ◽  
Practical Application ◽  
Core Component ◽  
Content Type ◽  
Model Aircraft ◽  
Test Verification

Purpose Engineered material arresting systems (EMASs) are dedicated to stopping aircraft that overrun the runway before they enter dangerous terrain. The system consists of low-strength foamed concretes. The core component of the arresting system design is a reliable simulation model. Aircraft test verification is required before the practical application of the model. This study aims to propose a simulation model for the arresting system design and conducts serial verification tests. Design/methodology/approach Six verification tests were conducted using a Boeing 737 aircraft. The aircraft was equipped with an extra inertia navigation system and a strain gauge system to measure its motion and the forces exerted on the landing gears. The heights of the arrestor beds for these tests were either 240 or 310 mm, and the entering speeds of the aircraft ranged from 23.9 to 60.6 knots. Findings Test results revealed that both the aircraft and the pilots on board were safe after the tests. The maximum transient acceleration experienced by the dummies on board was 2.5 g, which is within the human tolerance. The model exhibited a satisfied accuracy to the field tests, as the calculation errors of the stopping distances were no greater than 7 per cent. Originality/value This study proposes a simulation model for the arresting system design and conducts serial verification tests. The model can be used in EMAS design.

Precise Mechanics Control and Simulation of Automotive ABS

2012 ◽  
Vol 214 ◽  
pp. 817-821
Author(s):  
Ya Kun Wang ◽  
Peng Tan
Keyword(s):  
Simulation Model ◽  
System Design ◽  
Computer Technology ◽  
Automotive Industry ◽  
Rapid Development ◽  
Dynamic Equations ◽  
Simulation Studies ◽  
Precise Control ◽  
Braking System ◽  
Braking Distance

The rapid development of computer technology has brought a huge boost to the automotive industry. This paper uses computer technology to carry out simulation studies of automotive anti-lock braking system (ABS), through braking characteristics of the dynamic equations, we establish the simulation model, and get ABS braking distance and time in different roads, and through optimizing the system design simulation, we provide parameters in accordance with the precise control of the anti-lock braking system.

Miller Cycle-Regulatable Two Stage Turbocharging System Design of Marine Diesel Engines

2012 ◽  
Author(s):  
Yi Cui ◽  
Zhilong Hu ◽  
Kangyao Deng ◽  
Qifu Wang
Keyword(s):  
Simulation Model ◽  
System Design ◽  
High Speed ◽  
Combustion Model ◽  
Nox Emissions ◽  
Miller Cycle ◽  
Two Stage ◽  
Cycle Simulation ◽  
Turbocharging System ◽  
Marine Diesel

Satisfying the coming International Marine Organization (IMO) NOx emissions requirements and regulations is the main focus of attention in marine engine design. Miller cycle, which reduces in-cylinder combustion temperature by reducing effective compression ratio, is the main measure to reduce NOx specific emissions on the cost of volumetric efficiency and engine power. Therefore, it is essential to combine Miller cycle with highly boosted turbocharging system, for example, two stage turbocharing, to recover the power. In this paper, different two stage turbocharging system scenarios are introduced and compared. The system design and matching process is presented. A multi-zone combustion model based one dimensional cycle simulation model is established. The intake valve closure timing and the intake exhaust valves overlap duration are optimized according to the IMO NOx emission limits by the simulation model. The high and low stage turbochargers are selected by an iterative matching method. Then the control strategies of the boost air and the high stage turbine bypass valves are also studied. As an example, a Miller cycle-regulatable two stage turbocharging system is designed for a type of highly boosted high speed marine diesel engine. The results show that the NOx emissions can be reduced 30% and break specific fuel consumption can also be improved by means of moderate Miller cycle combined with regulatable two stage turbocharing.

Logistic Simulator for Steel-Making Process

2010 ◽  
Vol 154-155 ◽  
pp. 712-715
Author(s):  
La Mei He ◽  
Yan Hu
Keyword(s):  
Simulation Model ◽  
System Design ◽  
Production Planning ◽  
Process Parameters ◽  
Production System ◽  
Steel Plant ◽  
Decision Makers ◽  
Production Parameters ◽  
Steel Making ◽  
Design And Manufacture

Setting up an adaptable and flexible simulation model for steel-making process is very important to improve production system design and manufacture automation. To assist the decision-makers in steel-making plants, the Logistical simulator for steel-making has been developed using em-Plant software. The Simulator can be used to rapidly model any steel plant, including the movement of the operation equipments and the changes of production parameters. With the help of Simulator, the influences of lay-out changes, process parameters, and changes in planning could be revealed vividly, and the realistic production planning could be created. Results include production Gantt charts, display of cranes track, utilization figures and production statistics. Simulation cases show that the simulator is valid for simulating different steel-making processes, and production states on different conditions can be investigated by using this model.

scholarly journals How coping can hide larger systems problems: the routine immunisation supply chain in Bihar, India

2019 ◽  
Vol 4 (5) ◽  
pp. e001609 ◽  
Author(s):  
Bruce Y Lee ◽  
Patrick T Wedlock ◽  
Elizabeth A Mitgang ◽  
Sarah N Cox ◽  
Leila A Haidari ◽  
...  
Keyword(s):  
Supply Chain ◽  
Health System ◽  
Simulation Model ◽  
System Design ◽  
Computational Simulation ◽  
Routine Immunisation ◽  
Logistics Cost ◽  
Design Deficiencies ◽  
Vaccine Availability ◽  
The Impact

IntroductionCoping occurs when health system personnel must make additional, often undocumented efforts to compensate for existing system and management deficiencies. While such efforts may be done with good intentions, few studies evaluate the broader impact of coping.MethodsWe developed a computational simulation model of Bihar, India’s routine immunisation supply chain where coping (ie, making additional vaccine shipments above stated policy) occurs. We simulated the impact of coping by allowing extra trips to occur as needed up to one time per day and then limiting coping to two times per week and three times per month before completely eliminating coping.ResultsCoping as needed resulted in 3754 extra vaccine shipments over stated policy resulting in 56% total vaccine availability and INR 2.52 logistics cost per dose administered. Limiting vaccine shipments to two times per week reduced shipments by 1224 trips, resulting in a 7% vaccine availability decrease to 49% and an 8% logistics cost per dose administered increase to INR 2.73. Limiting shipments to three times per month reduced vaccine shipments by 2635 trips, which decreased vaccine availability by 19% to 37% and increased logistics costs per dose administered by 34% to INR 3.38. Completely eliminating coping further reduced shipments by 1119 trips, decreasing total vaccine availability an additional 24% to 13% and increasing logistics cost per dose administered by 169% to INR 9.08.ConclusionOur results show how coping can hide major system design deficiencies and how restricting coping can improve problem diagnosis and potentially lead to enhanced system design.

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