Study on the Stability Control of Vehicle Tire Blowout Based on Run-Flat Tire
Round 1
Reviewer 1 Report
The manuscript deals with very interesting and important issue. Unfortunately, the authors propose only a theory without experimental verification, therefore this work can be treated as a first step of their research. Nowadays a modeling and simulation itself are nothing unusual, that is why the proposed algorithm will be worth to be published but only after completing with validation.
At this stage the study is interesting from a didactic point of view only, the modeling itself at this stage is not groundbreaking and the work contributes nothing in terms of experimental research (which is lacking). In my opinion the submitted manuscript is too weak to be published in a high-indexed JCR scientific journal. I’m sure that after experimental verification, the article will be accepted.
Minor comments:
Line 27: Are you sure that [2]?
Line 89: is “wheel velocity V”, precise “wheel center velocity V”
Line 90: Instead of “relative longitudinal slip rate” you can (but not must) use the same term as in [18]. ie. "normalized longitudinal slip ratio" or simply "normalized longitudinal slip".
Equation (5): (-Dx+Xc) or (Dx+Xc)? Please check.
Line 126 and Figure 1: What specific tire are the graphs referring to?
Figure 1: It would be nice to rotate figure (b) as in (a), that is abscissa – Longitudinal displacement (mm), ordinate – Longitudinal force (N).
Line 130: Cornering stiffness is the slope of the pure slip curve at vanishing slip, ie. at alpha = 0 (see Pacejka):
Ky = d_Fy/d_alpha at alpha = 0, therefore according to Figure 1a Ky for zero pressure is rather bigger, not smaller, than by normal pressure 350 kPa. The point is nonlineartity of Fy in the range 0<alpha<1.8 and saturation by Fy = 4700 N.
If what you have in mind is a simplification, write this clearly eg.
"Adopting a simplification Ky ≈ Fy_sat/alpha_sat = 4700 N/1.8 deg the averaged cornering stiffnes Ky is about 1.48x10^5 N/rad, which is ...."
The same issue with Kx.
Line 133: Either " increased" (when you go after a strict definition) or "reduced to about 90% of normal..." (when you go after your simplification).
Table 1: Is “Insret”, should be “Insert”
Lines 153-157: Incomprehensible paragraph. Try more clear, specifically, it is not easy to follow haw “22.8 times” was calculated.
Line 168: Is: “the tire displacement under the rated pressure is 100.36 mm”. Maybe: “the zero-pressure tire displacement under the full load is 100.36 mm”? Please check.
Line 208: As far as possible, please keep the text comprehensible to scientists not familiar with the “fuzzy controller” terminology. Explain the new terms: tau, a21, b2, b1, U, Delda_beta, Delta_r.
Chapter 4. Provide basic mass and geometry data of the vehicle.
It is not enough to claim that CarSim has been used. The basic assumptions to the vehicle dynamics model are necessary, that is the number and names of degrees of freedom at least.
Line 229: If the tire size 37x12.5 R 16.5 also applies to the tire referred to in paragraph 2.2.1, introduce this size right in 2.2.1.
Line 247: That is a sudden change of state, but all the time the vehicle is stable.
Line 266-267: Unfinished sentence.
Figure 6: Truncated legends (“Uncontro”).
Author Response
please see the attachment
Author Response File: 
Author Response.pdf
Reviewer 2 Report
In this paper, the tire blowout model of inserts supporting run-flat tire is built based on the UniTire theory. The tire blowout parameters of the inserts supporting run-flat tire are adjusted through the tire mechanical characteristic test. The difference of tire blowout characteristics between inserts supporting run-flat tire and normal tire is compared, and a stability controller is designed for maintaining vehicular driving directionality. The topic is interesting and significant; however, there are some minor problems needed to be addressed for enhancing the quality of paper, which are as follows:
- The description of inserts supporting run-flat tire is not coincident in this paper, “inserts” or “insert”?
- It may be more accurate to use the “contact area” instead of the “contact patch” in Table 1.
- The details on Simulink-CarSim co-simulation platform can be given to make it clear for the readers, for example, the inputs and outputs of the platform.
- Some other details, such as misspelling and the spaces between units and values. Please check and correct.
Author Response
Dear Editors and Reviewers,
Thank you for your letter and for the reviewers' comments concerning our manuscript entitled “Study on stability control of vehicle tire blowout based on run-flat tire”. 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. Revised portion are marked in yellow in the paper. The responds to the reviewers' comments are as following:
Responds to the reviewers' comments
Reviewer #2
In this paper, the tire blowout model of inserts supporting run-flat tire is built based on the UniTire theory. The tire blowout parameters of the inserts supporting run-flat tire are adjusted through the tire mechanical characteristic test. The difference of tire blowout characteristics between inserts supporting run-flat tire and normal tire is compared, and a stability controller is designed for maintaining vehicular driving directionality. The topic is interesting and significant; however, there are some minor problems needed to be addressed for enhancing the quality of paper, which are as follows:
Comment 1: The description of inserts supporting run-flat tire is not coincident in this paper, “inserts” or “insert”?
Response: Thank you for your question. We have unified the description as “inserts supporting run-flat tire”.
Comment 2: It may be more accurate to use the “contact area” instead of the “contact patch” in Table 1.
Response: Thank you for your comment. We have corrected it.
Comment 3: The details on Simulink-CarSim co-simulation platform can be given to make it clear for the readers, for example, the inputs and outputs of the platform.
Response: Thank you for your suggestion. We have added the inputs and outputs of the platform. After tire blowout, the most variable parameters are cornering stiffness, longitudinal stiffness, rolling resistance coefficient and rolling radius, therefore, this paper only selects these four input parameters to describe, other detailed input parameters are shown in table 1. The vehicle two degree of freedom model is taken as the ideal vehicle motion model in this paper, and the main output parameters of yaw rate and sideslip angle of the mass center are described. At the same time, the lateral displacement and lateral acceleration are extracted to observe the change of vehicle.
Table 1. Vehicle and tire parameters
|
Parameter /unit |
Parameter symbol |
Parameter value |
|
Sprung mass /kg |
Ms |
2290 |
|
Height of center of mass /mm |
h |
810 |
|
Front axle distance /mm |
a |
1180 |
|
Rear axle distance /mm |
b |
1170 |
|
Wheel base /mm |
l |
2950 |
|
Effective rolling radius /mm |
Re |
454 |
|
Static load radius /mm |
R0 |
470 |
|
Rim diameter /mm |
D |
419 |
|
Width of tire section /mm |
B |
317 |
|
Radial stiffness /N×mm-1 |
Kt |
405 |
Comment 4: Some other details, such as misspelling and the spaces between units and values. Please check and correct.
Response: Thanks for your careful work. We have modified the above problems according to your comment.
We tried our best to improve the manuscript by making some corrections. Surely these corrections abided by the advice of reviewers. We really hope that they can obtain the approval of the academic editor and reviewers. Finally, we greatly appreciate for the editors and reviewers' warm work for my paper, and thanks again for the comments.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Dear Authors,
Thank you very much for your effort. Validation, especially of a series of the run-flat tires al well as a generalization of parametres would be welkomed. It can improve a lot your research in the future. I accept your corrected manuscript, however look once again at two points in your corrected version:
line 133: is "105", sholud be "105"
line 256-287 unfinished first sentence of Paragraph 4.2. Maybe what you have in mind is ""Stability control analysis in order to study the change of the stability parameters of the inserts supporting run flat tire after the tire blowout".
Best regards
Best regards.
Reviewer 2 Report
The questions that pointed in the last round have been addressed, and I have no futher comments.
