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Peer-Review Record

Observability Analysis and Observer Design for a Nonlinear Three-Tank System: Theory and Experiments

Sensors 2020, 20(23), 6738; https://doi.org/10.3390/s20236738
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Sensors 2020, 20(23), 6738; https://doi.org/10.3390/s20236738
Received: 9 September 2020 / Revised: 18 October 2020 / Accepted: 19 October 2020 / Published: 25 November 2020
(This article belongs to the Section Intelligent Sensors)

Round 1

Reviewer 1 Report

the paper’s quality is generally good. Theoretical derivation is correct, both simulations and experimental validations were provided. Comments are

  1. The smooth condition for the system dynamics f and h seems too strong. Is continuous a better assumption?
  2. In the theoretical manner, the uncertainty bounds of system models are not clarified. How much robustness margin can be achieved on this manner?
  3. The estimation comparisons among couple methods are presented. How to justify the comparison is fair?  Gains are the same? Which one is more robust?
  4. In the experimental comparison, it is better to use a table to list some quantities to clarify the conclusion, like the root mean square error, convergence time, etc. Fig. 13 needs to be zoomed out.

Author Response

Please find the response within the attached document.

Author Response File: Author Response.pdf

Reviewer 2 Report

Please see the attached pdf file.

Comments for author File: Comments.pdf

Author Response

Please find the response within the attached document.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

the authors have revised to address the comments. Quality has been improved. It is eligible for acceptance now.

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