A Systematic Literature Review of Various Control Techniques for Active Seat Suspension Systems

Round 1

Reviewer 1 Report

The reviewed text is a study to be a comprehensive study. Therefore, in terms of assessing the impact of vibration on the driver, in addition to the standard: “ISO 2631-1:1997 Mechanical vibration and shock — Evaluation of human exposure to whole-body vibration — Part 1: General requirements”, it is also worth using: “ISO 8041-1:2017 Human response to vibration — Measuring instrumentation — Part 1: General purpose vibration meters” and “EN 14253 : 2003 + A1 2007 Mechanical vibration - Measurement and calculation of occupational exposure to whole-body vibration with reference to health - Practical guidance”

In the analysis of the impact of vibrations on humans, it is worth using the model developed by R.R Coerman. It is also worth using ISO 10068: 2012 Mechanical vibration and shock - Mechanical impedance of the human hand-arm system at the driving point.

The reference list should list the standards that have been used.

In my opinion, the article is a good study of the issue but requires supplementation with new guidelines in the field of research and assessment of the impact of vibrations on humans.

Author Response

Review 1

The reviewed text is a study to be a comprehensive study. Therefore, in terms of assessing the impact of vibration on the driver, in addition to the standard: “ISO 2631-1:1997 Mechanical vibration and shock — Evaluation of human exposure to whole-body vibration — Part 1: General requirements”, it is also worth using: “ISO 8041-1:2017 Human response to vibration — Measuring instrumentation — Part 1: General purpose vibration meters” and “EN 14253 : 2003 + A1 2007 Mechanical vibration - Measurement and calculation of occupational exposure to whole-body vibration with reference to health - Practical guidance”

Answer: Agree. The ISO 8041-1:2017 Human response to vibration — Measuring instrumentation — Part 1: General purpose vibration meters has been added to the manuscript.

The following paragraph has been added: “On the other hands, ISO 8041-1:2017 is an international standard which is essentially used to assess the human response to vibration through the instrument vibration design. It principally specifies the performance specification for instrument designed to measure the vibration values. Vibration instruments specified in ISO 8041-1:2017 are intended to measure vibration for hand transmitted vibration, whole body vibration or low frequency whole body vibration [36]. The time averaged weighted acceleration value can be expressed mathematically as

where  presents the translational or rotational frequency weighted vibration acceleration in a specified direction as a function of instantaneous time ;  is in meters per second squared  or radians per second squared .”

 

In the analysis of the impact of vibrations on humans, it is worth using the model developed by R.R Coerman.

Answer: Agree. This text has been already included in the manuscript: “For simplicity, majority of studies have considered the seating suspension system model with a seated driver body as 1 DOF as presented in Figure 1(a) which is mainly composed of a single stiffness, mass and damper [26-28].” Coerman’s paper has been cited in the manuscript.

It is also worth using ISO 10068: 2012 Mechanical vibration and shock - Mechanical impedance of the human hand-arm system at the driving point.

Answer: Agree. This text has already been included in the manuscript. Researchers in the field of WBV have classified the vibration assessment measures into three categories namely: the mechanical impedance, apparent mass and seat to head transmissibility. These function categories are used to assess the human body subjected to the vibration. The mechanical impedance is defined as the periodic excitation force at a certain frequency divided by the resulting vibration velocity.

The reference list should list the standards that have been used.

Answer: Agree. The reference list has been updated.

 

In my opinion, the article is a good study of the issue but requires supplementation with new guidelines in the field of research and assessment of the impact of vibrations on humans.

Answer: Agree. New guidelines in the field of research and assessment of the impact of vibrations on humans have been amended. In this paper, the main efforts will be directed toward active vibration control of seat suspension system, the control methods and implementations. So, the core of the paper is to evaluate the control methods applied to the seating suspension system. The paper does not focus on the assessment of the impact of vibrations on human. But the paper has provided a general overview on the impact of vibration on human body.

Author Response File: Author Response.docx

Reviewer 2 Report

 

References must be cited in square brackets within the text. The square brackets must be used in the reference section also. The abstract is an important section of a paper. Its main goal is to present in a clear and concise way, the central idea of the work and its novelty. The authors must improve the abstract section in this sense. They must focus their explanations. We recommend to improve the introduction section.  In addition to this, it would be advisable to indicate, in the last part of the introduction, the advantages of your proposal. It would be interesting that the authors motivate that the results obtained and presented in this paper are limited to application. We suggest that the conclusion section must be more focused. The first paragraph is interesting but long a general for this kind of section. It would be necessary to improve a bit this section.

Author Response

Reviewer 2

1.     References must be cited in square brackets within the text. The square brackets must be used in the reference section also.

Answer: Agree.  All the references have been cited in square brackets.

2.     The abstract is an important section of a paper. Its main goal is to present in a clear and concise way, the central idea of the work and its novelty. The authors must improve the abstract section in this sense. They must focus their explanations.

Answer: Agree. The abstract section has been improved where the explanations are focused.

3.     We recommend improving the introduction section.  In addition to this, it would be advisable to indicate, in the last part of the introduction, the advantages of your proposal.

Answer: Agree. The introduction section has been improved. The advantage of the work has been added to the last part of the introduction.

The main contribution of this paper is in providing a systematic review about the active vibration control of seating suspension systems including their actuation system structures and control algorithms. The advantage of the work is identification of the research gaps and clarification of the future research questions.

4.     It would be interesting that the authors motivate that the results obtained and presented in this paper are limited to application.

Answer: Agree. The authors aim to reviewing technologies of reducing the seat vibration transmitted into the human body through applying a control force to the seat structure.  The results obtained and presented in this paper will be directed toward identification of research gaps and answering the research questions raised for engineering applications.

5.     We suggest that the conclusion section must be more focused. The first paragraph is interesting but long a general for this kind of section. It would be necessary to improve a bit this section. 

Answer: Agree. The conclusion section has been improved to be more focused. The first paragraph has been shorten and sharpen up.

The following paragraph has been added: “This paper attempts to provide a systematic literature review on the active vibration control of seating suspension system. Based on the examined findings, the active seating suspension system is suggested to be the future development trend of the seating suspension system due to the accurate force control, good ride quality and handling performances. Fundamental concepts of the biodynamic model of the seating suspension system and human body have been studied. The bio-dynamic models are categorised into three: the lumped mass-spring-dashpot model, finite element analysis model and multi-body human model. Degrees of freedom of the lumped mass-spring-dashpot models such as 1 DOF and 2 DOF models are determined based on the number of the independent coordinates to which the oscillators are referred. Three types of the ride comfort assessment strategies of frequency weighted RMS acceleration, VDV and SEAT values have been illustrated. The paper has also summarized the control strategies that have been applied in the active seating suspension system and evaluated their performances. The research gaps have been identified where research questions have been raised and will be answered in our future work. The authors have proposed the control algorithm of the model predictive control to be applied in the active seating suspension system.”

Reviewer 3 Report

The submitted paper is a review paper. It includes the literature review on the subject of an active vibration control of the seat suspension system. The paper summarizes the control strategies used in the active seat suspension system and evaluates their performance. The paper can be published in the Journal.

Author Response

Reviewer 3

The submitted paper is a review paper. It includes the literature review on the subject of an active vibration control of the seat suspension system. The paper summarizes the control strategies used in the active seat suspension system and evaluates their performance. The paper can be published in the Journal.

Answer: Agreed.