PONE-D-22-08046Parameter estimation for nonlinear sandwich system using instantaneous performance principlePLOS ONE

Dear Dr. Li,

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Qichun Zhang, PhD

Academic Editor

PLOS ONE

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Additional Editor Comments :

This paper investigates an interesting topic and would generate impact in practice. Basically, the writing needs to be improved and the typos should be corrected by a careful proof reading. Technically speaking, the contribution should be highlighted in revised version and the the details of technical design should be further explained as the comments mentioned that some assumptions cannot be met in real industrial processes. Therefore, a major revision is the decision for the current manuscript.

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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3. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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4. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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5. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: This paper proposes a predefined performance estimation approach using predefined constraint technology and high-effective filter for sandwich system. Few findings are reported for the instantaneous performance of parameter estimation because the instantaneous performance is difficult to quantify based on the design algorithm. A numerical simulation and real-life process are employed to demonstrate the effectiveness of the proposed novel estimator.

CMT.1: In Introduction, the specific reasons for the difficulty of transient performance research can be explained, which reflects the innovation of the article.

CMT.2: Is the degree information of two linear systems known or need to be re-estimated

CMT.3: In real industry, the sine signal of this paper is chosen as estimate the nonlinear process. For me this can cause issue as the input signal is not of sufficiently high order.

CMT.4: Piecewise deadzone function is described by the function (3) instead of the function based on (7)-(8).

CMT.5: Compared with the classic PPF, the function proposed (see, (17)) in this paper is designed as a whole design plan.

CMT.6: Is the estimation error used by authors the difference between the real value and the estimated value, or other definition forms.

Reviewer #2: In this work，an instantaneous performance scheme of parameter estimation is introduced for nonlinear sandwich system. The content of the paper meets the requirements of the journal and the writing is standard. Some other comments have been uploaded as the attachment.

Reviewer #3: Comment

The almost existing identification algorithms do not consider the prescribed error bound on the parameter estimation error information, which may result in the poor transient performance of parameter estimation during the identification process. In this paper, a novel identification scheme is presented for nonlinear sandwich model, which is implemented by using prescribed performance function and error transformation technique. The numerical example and experiment results validate that the proposed scheme can provide more accurate parameter estimation and better transient performance than the existing methods.

Comment 1: If the noise attribute is unknown, how to design the de-noising filter of this paper.

Comment 2: There exist two linear subsystems in this paper, the assumptions on the two linear systems should be stated as formal assumptions.

Comment 3: In Eq.(15), please remove the necessary derivation steps and give the results directly, because these formulas are easy to deduce.

Comment 4: The presentation and language need be improved.

Comment 5: The auxiliary model method can indeed solve the problems in this paper, but the specific solution block diagram needs to be provided.

Comment 6: In the process of proving the convergence of the proposed algorithm, I am interested in the meaning of the symbolic representation of “O” in Eq.(31).

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Reviewer #1: No

Reviewer #2: No

Reviewer #3: No

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Attachments

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Submitted filename: PONE-D-22-08046-suggestions.pdf

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Submitted filename: Comment.docx

Parameter estimation for nonlinear sandwich system using instantaneous performance principle

PONE-D-22-08046R1

Dear Dr. Li,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication.

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Kind regards,

Qichun Zhang, PhD

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

All the comments have been addressed well in the revised version. Therefore, the paper is recommended being accepted as it is.

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. If the authors have adequately addressed your comments raised in a previous round of review and you feel that this manuscript is now acceptable for publication, you may indicate that here to bypass the “Comments to the Author” section, enter your conflict of interest statement in the “Confidential to Editor” section, and submit your "Accept" recommendation.

Reviewer #1: All comments have been addressed

Reviewer #2: All comments have been addressed

Reviewer #3: All comments have been addressed

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2. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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4. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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5. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: I am satisfied with the revision, the technique issues are all addressed. The paper can be accepted in its presented form.

Reviewer #2: In this work，an instantaneous performance scheme of parameter estimation is introduced for nonlinear sandwich system. To achieve the above purpose, the estimation error information reflecting the transient performance of parameter estimation is procured using the developed some intermediate variables. Then, a predefined constraint function is used to prescribe the error convergence boundary, in which the convergence rate is lifted. The advantages and usefulness of the article are proved by examples. The major novelty of this paper is to use preset performance technology.

The revision is enough to be accepted for this journal. We have no other comments.

Reviewer #3: The author has dealt with all my opinions, and I am quite satisfied. I suggest the paper be accepted.

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7. PLOS authors have the option to publish the peer review history of their article (what does this mean?). If published, this will include your full peer review and any attached files.

If you choose “no”, your identity will remain anonymous but your review may still be made public.

Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy.

Reviewer #1: No

Reviewer #2: No

Reviewer #3: No

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