Operator & Fractional Order Based Nonlinear Robust Control for a Spiral Counter-Flow Heat Exchanger with Uncertainties and Disturbances^†

Round 1

Reviewer 1 Report

1. The analysis and summary of the relevant research in the introduction are general and lack of direct relevance to the research content. It is suggested to further summarize and refine.

2. Can the consistency between the mathematical model of the heat exchanger and the actual equipment be verified or explained?

3. How is the control parameter tuning realized in the simulation? Is the parameter combination the best? Please explain.

4. The description of the simulation conclusion is not detailed enough, and the correspondence with the simulation diagram is not obvious.

5. It is suggested to provide actual experimental data for verification, rather than using only simulation results.

Author Response

Many thanks. Please see the attached file.

Author Response File: Author Response.pdf

Reviewer 2 Report

A fractional order based robust controller with operator is presented for a spiral heat exchanger, with good simulation results.
The work is interesting and has good development, however, the results may be more described than reaffirm the conclusions. For example, a graph of tracking errors can better show the comparison. 
There are some typos (e.g. maltab) and missing spaces.

Author Response

Many thanks. Please see the attached file.

Author Response File: Author Response.pdf

Reviewer 3 Report

Dear Authors,

My remarks and corrections are listed in the attachment.

Kind Regards

Comments for author File: Comments.pdf

Author Response

Many thanks. Please see the attached file.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

The author has made a preliminary simulation study on  operator & fractional order nonlinear robust control for a spiral counter-flow heat exchanger with uncertainties and disturbances , nd looks forward to the author's further research in this field。