An Elastic Transmission Error Compensation Method for Rotary Vector Speed Reducers Based on Error Sensitivity Analysis
Round 1
Reviewer 1 Report
The methodology for the elastic transmission error compensation is well described.
In the abstract: "TE experiment results demonstrate that the TE of the modified speed reducer reduced by 47.22% than that of the initial speed reducer." should be reworded
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pg. 2, line 82: "Since the TE that is caused by thermal deformation is very small, it is not considered here."
How is this known? Typically thermal deformation can produce significant strain values. What temperature ranges are typically experienced?
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It would be beneficial to label the components in Figure 1.
Figure 1. Three-view drawing of the RV speed reducer
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on page 5, the first list is given in lower case letters and the second list is given in upper case letters. Are they meant to correspond to each other? If so, these two lists should be connected in a more clear manner.
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pg. 7, line 212: coefficient or coefficients?
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pg. 11, line 288: the conduct deformations?
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pg. 11, Figure 4:
The upper left figure adequately shows the stress distribution of the system. The upper right figure is unnecessary.
Also, the lower left figure is confusing.
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pg. 14, Figure 6: the equation in the last block of the flowchart is hard to read.
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pg. 15, line 365: "There are nine pinwheels between the m th and the n th pinwheels are in the meshing state with the cycloidal gear before modification of the cycloidal gear." should be reworded
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pg. 15, Table 4: 2nd column should have either 0 or 1 decimal point consistently. 3rd column should have 2 decimal points consistently.
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pg. 18, Table 7: similar decimal point formatting as Table 4
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pg. 19, Figure 12: it is hard to see what is going on between peaks.
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pg. 19, section 5.3: It is inconsistent calling the gear specimens a1 & a2 or A1 & A2
Also, it would be helpful to label them on the experimental setup
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pg. 19, line 451: what does curve A0 correspond to?
Author Response
Response to Reviewer 1 Comments Dear experts, this is my responses to your reviews. Point 1. The methodology for the elastic transmission error compensation is well described. In the abstract: "TE experiment results demonstrate that the TE of the modified speed reducer reduced by 47.22% than that of the initial speed reducer." should be reworded Response 1: Corrected. ---------------------------------- Point 2: pg. 2, line 82: "Since the TE that is caused by thermal deformation is very small, it is not considered here." How is this known? Typically thermal deformation can produce significant strain values. What temperature ranges are typically experienced? Response 2: The general operating temperature of RV Reducer is -10 ℃ to 35 ℃. Even if it is operated for a long time, the temperature of RV Reducer box will not exceed 80 ℃. In general, the room temperature of assembly line factory is constant at 20 ℃. So the thermal deformation of RV Reducer is almost zero. Therefore, the TE caused by thermal deformation is not considered in this paper. Explanations are also added in paper. ---------------------------------- Point 3: It would be beneficial to label the components in Figure 1. Figure 1. Three-view drawing of the RV speed reducer Response 3: Corrected. ---------------------------------- Point 4: on page 5, the first list is given in lower case letters and the second list is given in upper case letters. Are they meant to correspond to each other? If so, these two lists should be connected in a more clear manner. Response 4: In this section, the lower case letters explain the reason for the TE. The sentences marked with upper case letters show the relationship between TE and the factors of component errors. The two parts are related but not completely corresponding. For example, the sentence marked with lower case letter a states isometric and shifting tooth profile modifications and the relational sentences are marked with upper case letters A and B, respectively. Similarly, there are lower case letter h corresponding to upper case letter H and I. So, I think it's very difficult to represent the relationship between those two parts in a list. I think later readers can understand the connection between the two case letters in a careful reading. So I tend not to combine the two parts into a list. ---------------------------------- Point 5: pg. 7, line 212: coefficient or coefficients? Response 5: It is correct to use coefficients here. I forgot to write the letter s. Thank you for your correction. ---------------------------------- Point 6: pg. 11, line 288: the conduct deformations? Response 6: Yes. It is conduct deformations between pinwheels and cycloidal gears here. ---------------------------------- Point 7: pg. 11, Figure 4: The upper left figure adequately shows the stress distribution of the system. The upper right figure is unnecessary. Also, the lower left figure is confusing. Response 7: In simulation, only when the display range of stress is reduced, the stress on cycloidal gear and pinwheel can be displayed at the same time. That is why I add the stress distribution of the system in the upper right figure. So as the lower left figure. ---------------------------------- Point 8: pg. 14, Figure 6: the equation in the last block of the flowchart is hard to read. Response 8: I tried many times and finally improved the clarity. Later, I will ask the editor to improve the clarity and reduce the size of the Figure.6 before the paper are published. ---------------------------------- Point 9: pg. 15, line 365: "There are nine pinwheels between the m th and the n th pinwheels are in the meshing state with the cycloidal gear before modification of the cycloidal gear." should be reworded. Response 9: Corrected. ---------------------------------- Point 10: pg. 15, Table 4: 2nd column should have either 0 or 1 decimal point consistently. 3rd column should have 2 decimal points consistently. Response 10: Corrected. ---------------------------------- Point 11: pg. 18, Table 7: similar decimal point formatting as Table 4 Response 11: Corrected. ---------------------------------- Point 12: pg. 19, Figure 12: it is hard to see what is going on between peaks. Response 12: The original intention of Figure 12 is to show the maximum meshing force between cycloidal gears and pinwheels through simulation. The reason of the two peaks comes from the meshing process of cycloidal gears and pinwheels. One side of the tooth profile of a cycloidal gear first contacts pinwheels, and then the other side contacts the pinwheel later. This alternates into two peaks. ---------------------------------- Point 13: pg. 19, section 5.3: It is inconsistent calling the gear specimens a1 & a2 or A1 & A2 Also, it would be helpful to label them on the experimental setup Response 13: I have two places that are not case sensitive. Thank you for your correction. A1 and A2 are test pieces of cycloidal gear. A1 and A2 are the tooth shapes of cycloidal gear specimens A1 and A2. Since the initial and modified cycloidal gears are installed in the same RV Reducer, I cannot mark A1 and A2 on the experimental setup at the same time. ---------------------------------- Point 14: pg. 19, line 451: what does curve A0 correspond to? Response 14: Curve A0 is the tooth profile without any modification, which is theoretical tooth profile. This has been corrected in paper. Thank you for your review. If you still have questions, I'd be happy to answer them.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The paper ‘An Elastic Transmission Error Compensation Method for RV Speed Reducers based on Error-Sensitivity Analysis’ is suitable to publish in Applied Sciences after minor revision. Detailed comments are listed below:
- The literature review and the actual state of knowledge about ‘Elastic transmission error compensation’ are missing.
- Detail information about each view of drawing should be indicated in Figure 1 (e.g. cross-section view, top view)
- Some simulation details such as mesh type and loading and constraints conditions are missing for stress analysis.
- The resolution of Figure 7 is too low.
- The index and labels of Figure 8 are too complicated and messy; reviewer recommends separate it into several parts.
- Reference format is not consistent: some have issue number, but some others have not even same journal (e.g. Ref 29 and 30)
Author Response
Response to Reviewer 2 Comments
Dear experts, this is my responses to your reviews.
Point 1: The literature review and the actual state of knowledge about ‘Elastic transmission error compensation’ are missing.
Response 1: At present, there is almost no research on the elastic transmission error compensation of RV Reducer. So I didn't write it in the literal review and the actual state of knowledge. Because of the lack of research in this area, my paper chose the elastic transmission error compensation of RV Reducer as the research point.
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Point 2: Detail information about each view of drawing should be indicated in Figure 1 (e.g. cross-section view, top view)
Response 2: Corrected.
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Point 3: Some simulation details such as mesh type and loading and constraints conditions are missing for stress analysis.
Response 3: This is a quasi-static simulation. The hexahedral mesh is adopted to divide the model. The pinwheels are fixed and the cycloidal gears can only rotate around the central axis. Loads in the form of torque are applied at the geometric center of the cycloidal gears. These simulation details have also been added in paper.
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Point 4: The resolution of Figure 7 is too low.
Response 4: Are you talking about Figure 6?
I tried many times and finally improved the clarity. Later, I will ask the editor to improve the clarity and reduce the size of the Figure.6 before the paper are published.
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Point 5: The index and labels of Figure 8 are too complicated and messy; reviewer recommends separate it into several parts.
Response 5: The original intention of Figure 8 is a schematic diagram of RV Reducer in ADAMS. Because there are too many settings in ADAMS, many of which are software settings rather than constraint settings, I finally chose to display the constraint settings of RV Reducer in ADAMS in Figure 8.
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Point 6: Reference format is not consistent: some have issue number, but some others have not even same journal (e.g. Ref 29 and 30)
Response 6: Corrected.
Thank you for your review. If you still have questions, I'd be happy to answer them.
