Review Reports

Round 1

Reviewer 1 Report

The paper is well elaborated. Figures 3 and 4 are maybe not in a sufficient quality to read.

Interestig for the reader might be also to learn more about the "intelligence" to detect faults and pissible errors and the options to interact "in-situ" with the current running process.

But overall a very good paper!

Author Response

Dear Ms. Bella Li and dear reviewers,.

Re: Manuscript ID: processes-2418828 and Title: Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin

Thank you for your letter and for the reviewers' comments concerning our manuscript entitled " Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin"

(ID: processes-2418828)Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our researches. We have studied comments carefully and have made correction which we hope meet with approval. The main corrections in the paper and the responds to the reviewer's comments are as flowing:

Responds to the reviewer's comments:

Reviewer #1:

1. Response to comment: (The paper is well elaborated. Figures 3 and 4 are maybe not in a sufficient quality to read.)

Response: I have re-edited figures 3 and figures 4 to make them a little clearer.

2.Response to comment: (Interestig for the reader might be also to learn more about the "intelligence" to detect faults and pissible errors and the options to interact "in-situ" with the current running process.)

Response: At the end of Chapter 3, the interaction between digital twinning manufacturing processes is added, and the part of article 4.3 is modified to extend the appropriate dimension.

Special thanks to you for your good comments.

 

 

 

                                                                                             Sincerely,

 

                                                                                        Dr. Li, Yunfeng

 

 

Author Response File: Author Response.pdf

Reviewer 2 Report

Authors review the key manufacturing technology, manufacturing mode and manufacturing process based on digital twin in the life cycle of aeroengine mainshaft bearings, including the metallurgical process, heat treatment process and grinding process and fault diagnosis and life analysis of aeroengine mainshaft bearings.

As large amount of calculation will be referred, I recommend that the edge and cloud computing should be discussed.

The English language should be revised carefully.

Author Response

21.Dear Ms. Bella Li and dear reviewers,.

Re: Manuscript ID: processes-2418828 and Title: Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin

Thank you for your letter and for the reviewers' comments concerning our manuscript entitled " Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin"

(ID: processes-2418828)Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our researches. We have studied comments carefully and have made correction which we hope meet with approval. The main corrections in the paper and the responds to the reviewer's comments are as flowing:

Responds to the reviewer's comments:

Reviewer:

1. Response to comment: (As large amount of calculation will be referred, I recommend that the edge and cloud computing should be discussed.)

Response: Thank you very much for your suggestion. The article introduces the module of cloud computing in Picture 8 and discusses it in line 281 of the article.

2.Response to comment: (The English language should be revised carefully.)

Response: Thank you for your reply. I have corrected some English errors in the article. If the English of the article needs to be optimized, I will continue to revise it.

 

 

 

                                                                                                 Sincerely,

 

                                                                                             Dr. Li, Yunfeng

Author Response File: Author Response.pdf

Reviewer 3 Report

This paper summarizes some applications of aeroengine main shaft bearing and digital twin. The technology of digital twin plays more vital role in modern industry，and aeroengine main shaft bearing is significant in Aviation industry，therefore the combination of these two is extremely meaningful. The whole process of the bearing production becomes more efficient，and digital twin technology is becoming more sophisticated. But there are still some questions，it's better to be tackled before publication.

Question 1: Some details like grammars need to be checked carefully，such as line 253，273，454.

Question 2: There are figures are a little bit vague，it’s better to replace them with clearer ones.

Question 3：In chapter 3，the manufacturing process of the bearing is divided into several parts，and author introduce the detailed contents from the operation model，metallurgical process，heat treatment process，and grinding process. However the part of the design of structure is ignored，author need to explain .

Question 4: In the figure 9，by using the SVM twice，the crack size are all predicted as 3mm and 6mm，author need to describe this and add some explanations.

Question 5: RUL is short for remaining useful life ，author use RUL as the

abbreviation of remaining service life incorrectly.

Question 6: Some figures are not well marched in the place that author mentioned ，it is suggested to add more sentences to describe.

Question 7:It is supposed to add more overall summary of the applications in conclusion part.

Author Response

Dear Ms. Bella Li and dear reviewers,.

Re: Manuscript ID: processes-2418828 and Title: Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin

Thank you for your letter and for the reviewers' comments concerning our manuscript entitled " Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin"

(ID: processes-2418828) Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our researches. We have studied comments carefully and have made correction which we hope meet with approval. The main corrections in the paper and the responds to the reviewer's comments are as flowing:

Responds to the reviewer's comments:

Reviewer:

1.Response to comment: (Some details like grammars need to be checked carefully，such as line 253，273，454.)

Response: Thank you for pointing out the English errors in the paper. The errors you pointed out have been corrected in the article, and some other English errors in the article have also been corrected.

2.Response to comment: (There are figures are a little bit vague，it’s better to replace them with clearer ones.)

Response: Some unclear numbers have been replaced, such as Figures 3 and Figures 4.

3.Response to comment: (In chapter 3，the manufacturing process of the bearing is divided into several parts，and author introduce the detailed contents from the operation model，metallurgical process，heat treatment process，and grinding process. However the part of the design of structure is ignored，author need to explain .)

Response: The core of the manufacturing process based on digital twins in the article is control and interaction at each manufacturing stage, thus ignoring the structural design part of bearings. However, digital twins can also be well applied in structural design, as discussed in line 273 of the paper.

4.Response to comment: (In the figure 9，by using the SVM twice，the crack size are all predicted as 3mm and 6mm，author need to describe this and add some explanations.)

Response: The paper lacks an explanation of the experimental method and has been added in line 357 of the article.

5.Response to comment: (RUL is short for remaining useful life，author use RUL as the abbreviation of remaining service life incorrectly.)

Response: Thank you for pointing out the errors, which have been corrected in the article.

6.Response to comment: (Some figures are not well marched in the place that author mentioned ，it is suggested to add more sentences to describe.)

Response: Thank you for your suggestion. The main purpose of the paper is to describe the results of the application of digital twins, focusing more on the role of some methods, thus reducing the explanation of figures.

7.Response to comment: (It is supposed to add more overall summary of the applications in conclusion part.)

Response: At the end of Chapter 3, Section 4.3, and Conclusion, modifications have been made to emphasize the core idea of the article.

 

 

Thank you very much for your comments on this paper. I have been very careful in revising the issues you pointed out, so I replied to you quite late. Thank you again!

 

                                                                                                    Sincerely,

                                                                                              Dr. Li, Yunfeng

 

 

Author Response File: Author Response.pdf

Reviewer 4 Report

This is a comprehensive presentation on digital twin philosophy and potential usage/benefits, with significant value. However, this is of a very generic nature, without any focus on the proposed topic, and should be drastically reduced so that the proposed content prevails.

"4.3. A digital twin framework for fault diagnosis of aero-engine main shaft bearings" is supposed to be the main area for development/contribution. However, it is just marginally referred, without any specific details to evaluate benefits. This should be extended to the proper dimension.

The paper should emphasize real contributions from authors, not just generic integration of state-of-the-art concepts. The value of the presentation must be based on original content and custom data/information exploitation. Technical details are a must, as well as clear direct contributions (data and quantified results) from the authors.

This part needs to be drastically improved.

Author Response

Dear Ms. Bella Li and dear reviewers,.

Re: Manuscript ID: processes-2418828 and Title: Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin

Thank you for your letter and for the reviewers' comments concerning our manuscript entitled " Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin"

(ID: processes-2418828) Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our researches. We have studied comments carefully and have made correction which we hope meet with approval. The main corrections in the paper and the responds to the reviewer's comments are as flowing:

Responds to the reviewer's comments:

Reviewer:

    1.Response to comment: (However, this is of a very generic nature, without any focus on the proposed topic, and should be drastically reduced so that the proposed content prevails.)

    Response: The core of the manufacturing process based on digital twins in the paper is the control and interaction at each manufacturing link, while the core of fault diagnosis is the analysis and calculation of data. The main purpose is to describe the achievements after the application of digital twins, and more importantly, to describe the role of some methods.

    2.Response to comment: (However, it is just marginally referred, without any specific details to evaluate benefits. This should be extended to the proper dimension.)

    Response: Your comments made me realize the serious shortcomings of this paper. I strongly agree with your comments, so I have made revisions to the end, 4.3, and conclusion of Chapter 3 of the article, emphasizing the core idea of the paper.

    3.Response to comment: (The paper should emphasize real contributions from authors, not just generic integration of state-of-the-art concepts. The value of the presentation must be based on original content and custom data/information exploitation. Technical details are a must, as well as clear direct contributions (data and quantified results) from the authors.)

    Response: The framework of Chapter 4.3 of this paper is the main content that this paper aims to express. My idea is that digital twin technology can be applied throughout the entire life cycle of bearings. However, currently, there is no enterprise or team in my field that can experiment with this idea, so there is a lack of experimental data support. Therefore, I want to use the literature on the application of digital twin technology to every aspect of the entire life cycle of bearings as the ideological support of this paper.

    Thank you very much for your comments on this paper. I have been very careful in revising the issues you pointed out, so I replied to you quite late. Thank you again!

 

 

                                                                                    Sincerely,

                                                                            Dr. Li, Yunfeng

Author Response File: Author Response.pdf

Round 2

Reviewer 4 Report

It is in your best interest to provide more reference on current work with as much as possible quantitative information. This will always bring visibility and future recognition.