# Simulation and Experimental Study on the Shrub-Cutting Performance of Quasi-Planetary Cutter
## 5 Conclusions  
This paper proposes a planetary shrub-cutting tool and, based on the properties of shrubs, develops a planetary shrub-cutting test bench. In combination with finite-element simulation technology, the cutting performance of the new tool was explored:  
1. Using material mechanics methods and a universal mechanical testing machine, the material constitutive models of three types of shrubs were derived based on their transverse isotropy. Based on these constitutive models, a finite-element model of the planetary tool cutting shrubs was established. Single-factor simulation tests showed that as the tool rotation speed increases, the peak cutting force tends to decrease, while the peak cutting power initially decreases and then gradually increases. As the feed rate increases, both the peak cutting force and peak cutting power increase. Additionally, as the shrub diameter increases, both peak cutting force and peak cutting power also increase;
2. A three-factor, three-level orthogonal experiment was designed based on the constructed test bench. Regression and variance analyses were performed on the results, and a single-factor experiment was conducted with shrub moisture content as the variable. The experimental results showed that as moisture content increases, both peak cutting force and peak cutting power initially decrease and then increase. The results of the multi-factor experiment are consistent with those of the single-factor experiment;
3. With the optimisation objective of minimising both peak cutting force and peak cutting power, optimisation and experimental validation were performed. The results indicated that when the tool rotation speed is 1813 rpm, the feed rate is 30 mm/s, and  
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Number** & \(\mathbf{F_{\text{max}}}\) **(N)** & \(\mathbf{P_{\text{max}}}\) **(W)** \\ \hline
1 & 7.96 & 264.47 \\
2 & 8.35 & 277.43 \\
3 & 9.13 & 303.34 \\
4 & 8.81 & 292.71 \\
5 & 9.01 & 299.36 \\ Average value & 8.65 & 287.46 \\ Relative errors & 2.68\% & 1.56\% \\ \hline \hline \end{tabular}
\end{table}
Table 8: Test results.  
the shrub moisture content is 10.9%, the peak cutting force reaches 8.42 N, and the peak cutting power reaches 282.99 W, both achieving their optimal values. The errors between the predicted values and the validation test results are 2.68% and 1.56%, respectively [13].  
Conceptualization, Z.S. and X.D.; methodology, Z.S. and X.D.; software, Z.S. and Y.Z.; validation, Z.S. and C.T.; formal analysis, Z.S. and J.Z.; investigation, Z.S.; resources, X.D.; data curation, Z.S.; writing--original draft preparation, Z.S.; writing--review and editing, Z.S.; visualization, Z.S. and B.G.; supervision, X.D.; project administration, Z.S. and C.T. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the National Key Research and Development Program (Grant number: 2022 YFD2201001).  
Not applicable.  
The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author.  
Sincere thank also goes to [PERSON] for her kind help in the implementation of the test.  
The authors declare no conflicts of interest.  
The following abbreviations are used in this manuscript:  
A.H. Alnus hirsuta S.A. Syringa amurensis C.H. Corylus heterophylla