Sensor-Fusion-Based Simultaneous Positioning and Vibration Suppression Method for a Three-Degrees-of-Freedom Isolator

Round 1

Reviewer 1 Report

Manuscript ID: micromachines-2885395

Title: Sensor Fusion Based Simultaneous Positioning and Vibration Suppression Method for a 3-DOF Isolator

This manuscript proposes a new control method called H∞ control to improve the accuracy of platform positioning. This method addresses the limitations of the current absolute velocity feedback strategy by using information from multiple sensors combined through sensor fusion.. The topic is interesting, and the manuscript is well organized. However, the reviewer has some comments below.

1.       Abbreviated terms need to be explained. Ex: LQG, H₂/ H∞, PI…

2.       Check Eq. (1).

3.       Enlarge Fig. 12 for visualization.

4.       Can the author describe the experiment setup in more detail?

Minor editing of English language required

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

This paper is devoted to a novel H-infinity control strategy based on sensor fusion feedback.

There is an important remark. As far as I know, DGKF method for synthesizing H-infinity control allows to obtain full-order controller, but not reduced-order controller. The authors of the paper say about the reduced-order controller (see lines 226, 227). This point needs to explain in more details.

No comments.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 3 Report

- Since the sensor blending method is similar to reference [30], and the H∞ technique also does not appear to have significant differences from the previous method, it is necessary to describe the originality of the paper.

- It would be desirable to express the coordinates of Figure 1 more clearly.

- Provide justification for the H∞ norm of 3.1738.

- Please provide a caption for Figure 6 to include descriptions of n1, n2, and any other omitted elements.

- For Figure 7, it would be beneficial to include an analysis of why velocity feedback is superior to fusion feedback in terms of stability.

- Figure 10(b) step response needs to be more clearly drawn (to show characteristics of fusion feedback).

- Overall, well written, but some unclear expressions need revision.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

I recommend this paper for publication.