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

Round 1

Reviewer 1 Report

Authors have studied "the parameter estimation method of a countershaft brake for heavy-duty vehicles  with AMT without synchronizer". Most of the information presented in this paper is already published or studied. Analysis is weak and the results are not presented in good manner. Highlight the novelty of your work. 

• Present your work in good style by adding more graphs
• Add comparison 
• Check English style and grammatical mistakes 

This paper can be accepted for publication after major revision. 

Author Response




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Reviewer 2 Report

This paper studies the parameter estimation of the countershaft brake for a heavy-duty vehicle with automated mechanical transmission. The parameter identification is proposed based on the recursive least square method. 

Few minor comments are: 

1) In the recursive least square estimation, it is difficult to handle the constraints. It may happen that using this method the estimated parameter may provide physically unrealistic parameters. How are the authors going to handle the issue if it happens with the proposed method? 

2) Is figure 12 is the estimation result of figure 11? If yes,  why the estimation error changes largely at the beginning for 60% and 70% duty cycles while the torque values are nearly zero at the beginning in figure 11? 

3) The authors may specify some potential limitations of the current approach. 

 

 

Author Response

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Reviewer 3 Report

The parameter estimation method of a countershaft brake for heavy-duty vehicles with AMT is presented in this paper by the Autors. The AMT dynamic analysis is analyzed on the basis of the shifting model under specific condition. The estimation methods of the model parameters based on the RLSM are described by the Authors. Using the experimental data of the AMT input shaft speed without TB action, the calibration of the model was obtained by the Authors. The presented by the Authors results show that the estimation methods are effective and provide an experimental basis for further studying the shift schedule for heavy-duty vehicles with AMT without synchronizer. The work is interesting and clearly presented. However the Authors in the summary could provide more detailed information on the possibility of further use of a given model. For example, what are the benefits of such a model, what can its use be, and can it by use for e.g. improve the dynamics of shifting gears? etc.

Author Response

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Round 2

Reviewer 1 Report

Authors made significant changes in the manuscript and now it can be accepted.