Coordinated Control of Unmanned Ground Vehicle and Unmanned Aerial Vehicle Under Line-of-Sight Maintenance Constraint

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

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Comments for author File: Comments.pdf

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

This work proposes a cooperative control framework for a hybrid system of vehicles. In my opinion, the authors should treat:

1. In Section 2, at the beginning, please describe the problem. It is not clear to me why the drone has a goal state, as it supports the ground vehicle. Is the goal state of the drone somehow derived from the goal state of the UGV?
2. Eq. 1. The codomains of the functions fk seem to be R3. Please define these functions by setting also their domains and codomains.
3. Fig. 3. Please also represent the points xgk.
4. Section 3. Please give full names and short descriptions for APF, VO, and DWA. Also, mention who implemented them.
5. Please describe the computing environment used, and whether the applications are available for future research.
6.  Fig 5. Please show where the Turns 1 - 6 are.
7. Table 4 is not clearly mentioned in the text. 
8. Add a new column in Table 4, showing the computational resources needed for each method (for example, the execution time). Perform an analysis of cost-gain. 

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

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Comments for author File: Comments.pdf

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

Comments and Suggestions for Authors

The authors correctly and completely treated all the issues.

Reviewer 3 Report

Comments and Suggestions for Authors

The authors have addressed all the comments.