Precise Configuring of Actuators/Sensors for Active Control of Sound Quality in Cabs with Modal Vibration Energy and LA-PSO

Round 1

Reviewer 1 Report

The authors present and discuss their work on configuring actuators/sensors methods for active control of sound quality in cabs with modal vibration energy and LA-PSO. 

The topic is within the scope of Applied Sciences.

The work is systematic, complete, and well-organized. The results are convincing. Some small details need to be adjusted.

 Minor comments:

1) Figure 1: Please briefly introduce the models of heavy commercial vehicles studied in this paper.

2) Figure 3, Figure 4, and Figure 4 are not very clear, please modify them.

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

This paper presents a study on the precise configuring actuators/sensors method for active control of sound in cabs with modal vibration energy. An multi-mode composite control criterion is postulated, and an improved Linear Adaptive Particle Swarm Optimization (LA-PSO) technique is developed. The work is interesting for the field of active noise control of cabs. However, two main concerns should be addressed as follows:

1. The structural-acoustic coupling problem isn't considered In this paper, but it has to be involved when the cab interior noise is studied, which involves complicated couplings between the structural and acoustic modes, and thus results in the sound radiation into the cab. 

2. The simulation effect of active sound control should be presented to verify the optimized  actuators/sensors configuration and control system.

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

The present manuscript proposes a method to determine a suitable amount of sensors and actuators for active sound suppression in truck cabs. The authors offer a numerical study where they first analyze the problem in state space, aided with eigen-frequency finite-element results.

 

The paper is linear and easy to follow. It would fall into the scope of the target journal.

 

However, I have some queries that require the authors’ attention:

·       The contribution of the work is weak requires deeper insight. The authors claim that this type of study has been carried out only in simple structures. What is the implication of developing already known methods on a more complex structure?

·       The authors use LQR optimal control. However, it is not clear how they choose weighting matricx coefficients for Q and R. 

·       Authors employ piezoelectric actuators, but they are not modeled in the work. Please address this either by adding the model to your formulation or by justifying your choice.

·       In terms of organization, it would be better to introduce first the state space model and then the LQR formulation. Also, in the LQR formulation, not all the symbols of the cost function are clear.

·       Given the amount of symbols, I suggest to introduce a Nomenclature section.

·       Please proof-read your manuscript to solve minor language inaccuracies.

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

It can be accepted in its current form.

Reviewer 3 Report

The authors have successfully addressed my comments. From my perspective, the paper can be accepted for publication.