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2026 Vol.8, Issue 2 Preview Page

Research Article

Comparison of equal- and CRITIC-weighted desirability functions for multi-response optimization of blade angles in amaranth stem cutting
SungHun Jung1
,
DongGun Lee12
,
SungBo Shim1*
1Department of Bio Industrial Machinery Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
2Department of Industrial Machinery DX, Korea Institute of Machinery and Materials, Daejeon 34103, Republic of Korea
*Corresponding Author
30 June 2026. pp. 184-203
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Abstract

The production and commercialization of amaranth have expanded due to increasing interest in its nutritional value and environmental adaptability, creating a need to improve the cutting performance of harvesting machinery. Improving cutting performance is closely related to determining the optimal blade conditions, and multi-response optimization considering both force and energy indices is required. In multi-response optimization, the desirability function is commonly applied using equal weights. However, when responses are highly correlated or when the relative importance of each response is difficult to determine in advance, the use of equal weights may lead to biased optimal conditions. Therefore, in this study, the model-predicted optimal cutting conditions for amaranth stems were derived using the Criteria Importance Through Intercriteria Correlation (CRITIC) weighting method and compared with those obtained using the equal weighting method. As a result, both methods produced the same model-predicted optimal conditions: a shear angle of 40.00°, an approach angle of 40.00°, and a bevel angle of 10.00°. Under these conditions, the predicted cutting strength and specific cutting energy were 0.06798 N/mm2 and 0.41062 mJ/mm2, respectively. The overall desirability was 0.90797 for the equal weighting method and 0.90858 for the CRITIC weighting method, showing a slightly higher value when the CRITIC weighting method was applied. However, the identical optimal conditions obtained by the two methods were attributed to the fact that both responses decreased toward the same boundary of the design space and that the difference in the normalized standard deviations of the two responses was small. This study demonstrated the feasibility of the CRITIC weighting method for optimizing the cutting conditions of amaranth stems, and further multi-response optimization studies including additional responses such as blade wear and cut-surface quality are needed.

Keywords
Amaranth stem
Cutting blade angles
Desirability function
CRITIC
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Information
  • Publisher :Korean Society of Precision Agriculture
  • Publisher(Ko) :한국정밀농업학회
  • Journal Title :Precision Agriculture Science and Technology
  • Journal Title(Ko) :정밀농업과학기술
  • Volume : 8
  • No :2
  • Pages :184-203
  • Received Date : 2026-06-05
  • Revised Date : 2026-06-27
  • Accepted Date : 2026-06-29
  • DOI :https://doi.org/10.22765/pastj.20260015
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