Optimal Design of Fractional-Order Electrical Network for Vehicle Mechatronic ISD Suspension Using the Structure-Immittance Approach
Round 1
Reviewer 1 Report
This paper proposed a design method of fractional-order electrical network structure of a mechatronic inerter for fractional-order electrical network components. A quarter suspension dynamic simulation model is established, and the structure-immitance approach is used to design the electrical network structure. Finally, the feasibility of the fractional order electrical network structure obtained by this method is verified by simulation. The content of the article is novel and the idea is clear, which has made some contributions to the structural design of the vehicle mechatronic ISD suspension using the fractional-order electrical network, and is worth publishing. The following suggestions are proposed for reference:
1)The improved Oustaloup filter is used to approximate fractional calculus. What are its advantages over the original Oustaloup filter?
2)Why choose the quarter suspension model as the reference model? Its analytical results may be obtained easily.
3)The author shall provide the simulation values of P, kt, ke of equation (6).
Author Response
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Author Response File: 
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Reviewer 2 Report
The proposed suspension system of a vehicle system is unique characteristics as compared to the conventional one owing to the coupling mechanism between a mechanical system and a mechatronic inerter. As authors stated, the unique characteristics of proposed system may play critical role in the control of the dynamics of a vehicle system. However, several critical issues can e found in the present form.
[1] The abstract contents should be revised to state clearly what authors highlighted in the submission.
[2] Even though citing reference [26], equations ((2)-(4) are difficult to understand including Table 1. In addition, all relative parameters should be defined in equations.
[3] How to derive the specification of quarter model in Table 2? How to derive impedance expression in Equation (6)? You proposed two kind s of impedance model in Equation (7) and (8) but I cannot found why you proposed those two models?
[4] In section 4, the optimization process was also too briefly introduced so that readers may feel difficult to understand it without referring relative studies. In addition, you dynamic tire model was used as evaluation indications without proper explanations.
[5] In Fig. 7, authors explained the unique characteristics of proposed suspension system but it should compared that with conventional dynamic body diagram of spring-damper mechanical suspension one, too.
[6] You showed the superiority of the proposed suspension system in Table 4 but no explanation was done for the traditional passive suspension. Is the traditional suspension system is prepared as optimal one? Non-properly tuned mechanical suspension system may show poor performance.
These raised issues showed negative judgement for current version.
Author Response
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Author Response File: 
Author Response.pdf
Round 2
Reviewer 2 Report
Most of reviewer's issues were solved in the revised version. To improve the quality of the final version, I proposed additional comments below.
[1] Authors stated the traditional passive suspension was tuned as mature ones but little evidence was shown at the revised version, either.
[2] Simulation results were not well summarized for two ISD suspensions in Table 4. It is better to revise it.
[3] The improvement of the proposed ISD suspensions were not remarkable except for 'RMS of suspension working space’ index. Additional explanation should be added to highlight your achievements.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
