scholarly journals Development of analytical dynamic model for heavy-duty crane ship in cargo drop conditions

2019 ◽  
Vol S-I (2) ◽  
pp. 63-66
Author(s):  
I. Blagovidova ◽  
◽  
N. Dyachuk ◽  
D. Nesin ◽  
A. Pyanov ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Heavy Duty ◽  
Analytical Dynamic

scholarly journals Parameter Estimation of a Countershaft Brake for Heavy-Duty Vehicles with Automated Mechanical Transmission

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1036
Author(s):  
Yunxia Li ◽  
Lei Li
Keyword(s):  
Parameter Identification ◽  
Least Squares ◽  
Dynamic Model ◽  
Control Flow ◽  
Mechanical Transmission ◽  
Equivalent Resistance ◽  
Heavy Duty ◽  
Characteristic Parameters ◽  
Resistance Torque ◽  
Heavy Duty Vehicles

A countershaft brake is used as a transmission brake (TB) to realize synchronous shifting by reducing the automated mechanical transmission (AMT) input shaft’s speed rapidly. This process is performed to reduce shifting time and improve shifting quality for heavy-duty vehicles equipped with AMT without synchronizer. To improve controlled synchronous shifting, the AMT input shaft’s equivalent resistance torque and the TB’s characteristic parameters are studied. An AMT dynamic model under neutral gear position is analyzed during the synchronous control interval. A dynamic model of the countershaft brake is discussed, and its control flow is given. The parameter identification method of the AMT input shaft’s equivalent resistance torque is given on the basis of the least squares algorithm. The parameter identification of the TB’s characteristic parameters is proposed on the basis of the recursive least squares method (RLSM). Experimental results show that the recursive estimations of the TB’s characteristic parameters under different duty cycles of the TB solenoid valve, including brake torque estimation, estimation accuracy, and braking intensity estimation, can be effectively estimated. The research provides some reliable evidence to further study the synchronous shifting control schedule for heavy-duty vehicles with AMT.

scholarly journals Development of an Analytical Dynamic Model of a Vibro-Compactor Used in Carbon Anode Production

2013 ◽  
pp. 1111-1115
Author(s):  
Fatma Rebaïne ◽  
Mohamed Bouazara ◽  
Daniel Marceau ◽  
Duygu Kocaefe ◽  
Brigitte Morais
Keyword(s):  
Dynamic Model ◽  
Carbon Anode ◽  
Analytical Dynamic

Use of an Innovative Predictive Heat Release Model Combined to a 1D Fluid-Dynamic Model for the Simulation of a Heavy Duty Diesel Engine

2013 ◽  
Vol 6 (3) ◽  
pp. 1566-1579 ◽  
Author(s):  
Mirko Baratta ◽  
Roberto Finesso ◽  
Hamed Kheshtinejad ◽  
Daniela Misul ◽  
Ezio Spessa ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Dynamic Model ◽  
Fluid Dynamic ◽  
Heavy Duty ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Release Model

scholarly journals Improved Deep Belief Networks (IDBN) Dynamic Model-Based Detection and Mitigation for Targeted Attacks on Heavy-Duty Robots

2018 ◽  
Vol 8 (5) ◽  
pp. 676 ◽  
Author(s):  
Lianpeng Li ◽  
Lun Xie ◽  
Weize Li ◽  
Zhenzong Liu ◽  
Zhiliang Wang
Keyword(s):  
Dynamic Model ◽  
Belief Networks ◽  
Deep Belief Networks ◽  
Heavy Duty ◽  
Model Based ◽  
Targeted Attacks

An Analytical Dynamic Model of a Hollow Cylindrical Roller Bearing

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Jing Liu ◽  
Yimin Shao
Keyword(s):  
Fatigue Life ◽  
Dynamic Model ◽  
Contact Stiffness ◽  
Roller Bearing ◽  
Great Influence ◽  
Radial Load ◽  
Shaft Speed ◽  
Roller Bearings ◽  
Cylindrical Roller ◽  
Analytical Dynamic

Hollow cylindrical roller bearings (HCRBs) have obtained much attention from design engineers in bearing industries since they can perform better than solid cylindrical roller bearings (SCRBs) in centrifugal forces, contact stiffness, cooling ability, fatigue life, etc. In this study, an analytical dynamic model of a lubricated HCRB is presented to analyze the influences of the radial load, the shaft speed, and the hollowness percentage of the roller on the bearing vibrations, which cannot be formulated by the methods in the reported literature. Both the support stiffness of the shaft and the roller mass are formulated in the presented dynamic model. The hollow hole in the roller is modeled as a uniform one. Numerical results show that the hollowness percentage of the roller has a great influence on the vibrations of the roller and the inner race of the HCRB. Moreover, the vibrations of the components of the HCRB are not only determined by the hollowness percentage of the roller, but also depended on the external radial load and shaft speed. Therefore, during the design process for the hollowness percentage of the roller, the influences of the radial load and the shaft speed on the vibrations of the bearing components should be considered, except for the fatigue life. The results show that this work can give a new dynamic method for analyzing the vibrations of the HCRBs. Moreover, it can give some guidance for the design method for the HCRBs.

scholarly journals Analysis and Optimisation of Ride Vibration of a Heavy-Duty Truck Based on a Vertical-Pitch-Roll Driver-Vehicle Coupled Dynamic Model

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Peng Guo ◽  
Jiewei Lin ◽  
Zefeng Lin ◽  
Jinlu Li ◽  
Chi Liu ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Degrees Of Freedom ◽  
Ride Comfort ◽  
Design Method ◽  
Human Model ◽  
Design Parameters ◽  
Heavy Duty ◽  
Heavy Duty Truck ◽  
Heavy Duty Vehicle ◽  
Vehicle Dynamic Model

The ride comfort and the cargo safety are of great importance in the vibration design of heavy-duty vehicle. Traditional ride comfort design method based on the response of components of vehicles or interaction between human and seat overlooks the most direct criterion, the response of occupants, which makes the optimisation not targeted enough. It will be better to conduct the ride comfort design with the biodynamic response of driver. To this end, a 17-degrees-of-freedom (DOFs) vertical-pitch-roll vehicle dynamic model of a three-axle heavy-duty truck coupled with a 7 DOFs human model is developed. The ride comfort of human body under the vertical, the pitch, and the roll vibrations can be evaluated with the weighted root-mean-square (r.m.s.) acceleration of the driver in multiple directions. The flexibilities of chassis and carriage are also considered to improve the accuracy of the prediction of the ride comfort and to constrain the mounting optimisation of cab and carriage. After validation, the sensitivity analysis of the mounting system, the suspensions, and arrangement of sprung masses is carried out and significant factors to ride vibration are identified. The optimal combination of design parameters is obtained with the objective of minimizing the vibration of the driver and carriage simultaneously. The optimisation result shows that the weighted driver vibration is reduced by 27.9% and the carriage vibration is reduced by 31.8% at various speeds.

A condensed dynamic model of a heavy-duty truck for optimization of the powertrain mounting system considering the chassis frame flexibility

2020 ◽  
Vol 234 (10-11) ◽  
pp. 2602-2617
Author(s):  
Bohuan Tan ◽  
Yuanchang Chen ◽  
Quanfu Liao ◽  
Bangji Zhang ◽  
Nong Zhang ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Coupling Model ◽  
Rigid Foundation ◽  
Model Optimization ◽  
Optimization Strategy ◽  
Heavy Duty ◽  
Vehicle Model ◽  
Heavy Duty Truck ◽  
Proposed Model ◽  
Rigid Model

The existing powertrain mounting models of the heavy-duty truck for optimizing the mounts parameters cannot well describe the deformation of the chassis frame. To overcome this disadvantage, a new full vehicle model is proposed which embraces the view of system modeling and includes the frame flexibility. The model can achieve optimal parameters of the Powertrain Mounting System for isolating the vibration transmitted from the powertrain to the chassis. A model reduction technique, improved reduced system, is used to obtain a reduced model of the frame to represent its original large-scale finite element analysis model for the accessibility of time-efficient solutions of the model. The reduced frame model is integrated with the powertrain mounting and suspension model to form the full dynamic model of the vehicle. The accuracy and effectiveness of the proposed model are evaluated by its original vehicle model built in software ADAMS and an existing rigid model with rigid foundation. A hybrid model optimization strategy is also presented to tune the dynamic parameters of the powertrain mounts using the developed coupling model. The simulation results show that the proposed coupling model has better representation of the dynamic characteristics of the real vehicle system, and the presented hybrid model optimization strategy can obtain better optimization results compared with the existing rigid model with rigid foundation. In addition, the application of the proposed model can also be extended to the vibration control and the structural fatigue prediction.

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