journal article·2025-06-13Open access

Investigation of the Applicability of Acoustic Emission Signals for Adaptive Control in CNC Wood Milling

Miroslav Dado, Peter Koleda, František Vlašic, Jozef Salva

Applied Sciences· Volume 15· Issue 12

Abstract

The integration of acoustic emission (AE) signals into adaptive control systems for CNC wood milling represents a promising advancement in intelligent manufacturing. This study investigated the feasibility of using AE signals for the real-time monitoring and control of CNC milling processes, focusing on medium-density fiberboard (MDF) as the workpiece material. AE signals were captured using dual-channel sensors during side milling on a five-axis CNC machine, and their characteristics were analyzed across varying spindle speeds and feed rates. The results showed that AE signals were sensitive to changes in machining parameters, with higher spindle speeds and feed rates producing increased signal amplitudes and distinct frequency peaks, indicating enhanced cutting efficiency. The statistical analysis confirmed a significant relationship between AE signal magnitude and cutting conditions. However, limitations related to material variability, sensor configuration, and the narrow range of process parameters restrict the broader applicability of the findings. Despite these constraints, the results support the use of AE signals for adaptive control in wood milling, offering potential benefits such as improved machining efficiency, extended tool life, and predictive maintenance capabilities. Future research should address signal variability, tool wear, and sensor integration to enhance the reliability of AE-based control systems in industrial applications.
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Research context

OpenAlex topics: Advanced machining processes and optimization · Manufacturing Process and Optimization · Engineering Technology and Methodologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Manufacturing Technology and Quality Management, Faculty of Technology, Technical University in Zvolen, Študentská 26, 960 01 Zvolen, Slovakia

Department of Manufacturing and Automation Technology, Faculty of Technology, Technical University in Zvolen, Študentská 26, 960 01 Zvolen, Slovakia

Institute of Machine and Industrial Design, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2, 61669 Brno, Czech Republic

Department of Environmental Engineering, Faculty of Ecology and Environmental Sciences, Technical University in Zvolen, T. G. Masaryka 24, 960 01 Zvolen, Slovakia

Funding

Slovak Research and Development Agency

References (54)

Show source-provided references
1. Method for Drill-Bit Arrangement in CNC Woodworking Drilling Machine for Mass Customization10.1016/j.jmsy.2024.11.019 ↗
2. Comparison of the Roughness of the CNC Milled Surface of Selected Wood Species
3. Chen, C. (2024). Application of Support Vector Machine–Based CNC Machining in Furniture Product Visual Design and Production Control Process. Int. J. Adv. Manuf. Technol, 1–9.10.1007/s00170-024-14243-x ↗
4. Advanced Adaptive Feed Control for CNC Machining10.1016/j.rcim.2023.102621 ↗
5. Active-Passive Hybrid Feed Rate Control Systems in CNC Machining: Mitigating Force Fluctuations and Enhancing Tool Life10.1016/j.jmsy.2024.09.004 ↗
6. Sousa, V.F.C., Silva, F.J.G., Fecheira, J.S., Lopes, H.M., Martinho, R.P., Casais, R.B., and Ferreira, L.P. (2020). Cutting Forces Assessment in CNC Machining Processes: A Critical Review. Sensors, 20.10.3390/s20164536 ↗
7. Multi-Objective Feed Rate Optimization of Three-Axis Rough Milling Based on Artificial Neural Network10.1007/s00170-021-06902-0 ↗
8. Multi-Objective Feedrate Optimization Method of End Milling Using the Internal Data of the CNC System10.1007/s00170-018-2923-8 ↗
9. Linear Programming Feedrate Optimization10.1007/s00170-022-08708-0 ↗
10. Kasiviswanathan, S., Gnanasekaran, S., Thangamuthu, M., and Rakkiyannan, J. (2024). Machine-Learning- and Internet-of-Things-Driven Techniques for Monitoring Tool Wear in Machining Process: A Comprehensive Review. J. Sens. Actuator Netw., 13.10.3390/jsan13050053 ↗
11. Tool Condition Monitoring Techniques in Milling Process—A Review10.1016/j.jmrt.2019.10.031 ↗
12. Lazar, E., Bennett, K.S., Hurtado Carreon, A., and Veldhuis, S.C. (2024). An Automated Feature-Based Image Registration Strategy for Tool Condition Monitoring in CNC Machine Applications. Sensors, 24.10.3390/s24237458 ↗
13. Kotha Amarnath, S., Inturi, V., Rajasekharan, S.G., and Priyadarshini, A. (2025). Combining Sensor Fusion and a Machine Learning Framework for Accurate Tool Wear Prediction During Machining. Machines, 13.10.3390/machines13020132 ↗
14. Predicting Cutting Tool Life: Models, Modelling, and Monitoring10.1007/s00170-024-14961-2 ↗
15. State-of-the-Art Review of Applications of Image Processing Techniques for Tool Condition Monitoring on Conventional Machining Processes10.1007/s00170-023-12679-1 ↗
16. Przybyś-Małaczek, A., Antoniuk, I., Szymanowski, K., Kruk, M., and Kurek, J. (2023). Application of Machine Learning Algorithms for Tool Condition Monitoring in Milling Chipboard Process. Sensors, 23.10.3390/s23135850 ↗
17. Cutting Forces and Cutting Quality in the Up-Milling of Solid Wood Using Ceramic Cutting Tools10.1007/s00170-021-06991-x ↗
18. Learning Approach to Cycle-Time-Minimization of Wood Milling Using Adaptive Force Control
19. Cao, K., Han, J., Xu, L., Shi, T., Liao, G., and Liu, Z. (2022). Real-Time Tool Condition Monitoring Method Based on in Situ Temperature Measurement and Artificial Neural Network in Turning. Front. Mech. Eng., 17.10.1007/s11465-021-0661-3 ↗
20. Process Monitoring Evaluation and Implementation for the Wood Abrasive Machining Process10.3390/s101110401 ↗
21. Kminiak, R., Němec, M., Igaz, R., and Gejdoš, M. (2023). Advisability-Selected Parameters of Woodworking with a CNC Machine as a Tool for Adaptive Control of the Cutting Process. Forests, 14.10.3390/f14020173 ↗
22. Dong, W., Xiong, X., Ma, Y., and Yue, X. (2021). Woodworking Tool Wear Condition Monitoring during Milling Based on Power Signals and a Particle Swarm Optimization-Back Propagation Neural Network. Appl. Sci., 11.10.3390/app11199026 ↗
23. Discrete wavelet transformation and genetic algorithm—Back propagation neural network applied in monitoring woodworking tool wear conditions in the milling operation spindle power signals10.15376/biores.16.2.2369-2384 ↗
24. Zhu, Z., Buck, D., Guo, X., Xiong, X., Xu, W., and Cao, P. (2022). Energy Efficiency Optimization for Machining of Wood Plastic Composite. Machines, 10.10.3390/machines10020104 ↗
25. Intelligent Wood Machining Monitoring Using Vibration Signals Combined with Self-Organizing Maps for Automatic Feature Selection10.1007/s00170-020-05505-5 ↗
26. Apostolou, G., Ntemi, M., Paraschos, S., Gialampoukidis, I., Rizzi, A., Vrochidis, S., and Kompatsiaris, I. (2024). Novel Framework for Quality Control in Vibration Monitoring of CNC Machining. Sensors, 24.10.3390/s24010307 ↗
27. Hortobágyi, Á., Koleda, P., Koleda, P., and Kminiak, R. (2023). Effect of Milling Parameters on Amplitude Spectrum of Vibrations during Milling Materials Based on Wood. Appl. Sci., 13.10.3390/app13085061 ↗
28. Application of audible sound signals in tool wear monitoring: A review
29. Ahmed, M., Kamal, K., Ratlamwala, T.A.H., Hussain, G., Alqahtani, M., Alkahtani, M., Alatefi, M., and Alzabidi, A. (2023). Tool Health Monitoring of a Milling Process Using Acoustic Emissions and a ResNet Deep Learning Model. Sensors, 23.10.3390/s23063084 ↗
30. Accelerated Singular Spectrum Analysis and Machine Learning to Investigate Wood Machining Acoustics10.1016/j.ymssp.2024.111879 ↗
31. Vibro-acoustic signals as a source of information about tool wear during laminated chipboard milling
32. Use of cutting force and vibro-acoustic signals in tool wear monitoring based on multiple regression technique for compreg milling10.15376/biores.14.2.3379-3388 ↗
33. Effects of Grain Angle on the Amplitudes of Acoustic Emission and Surface Roughness in Wood Machining10.1007/s00226-006-0117-2 ↗
34. Toward a Process Monitoring and Control of a CNC Wood Router: Development of an Adaptive Control System for Routing White Birch
35. Tool Condition Monitoring Strategies from Metal Cutting: Insights for Optimizing Wood-Based Material Processing10.1007/s00107-024-02198-5 ↗
36. Advances on Indirect Methods to Evaluate Tool Wear for Radiata Pine Solid Wood Molding10.1016/j.wear.2015.12.011 ↗
37. Tool Wear Monitoring by Ensemble Learning and Sensor Fusion Using Power, Sound, Vibration, and AE Signals
38. A Machine Learning Approach to Predict Properties of Wood Products During Milling
39. (2001). Non-Destructive Testing—Acoustic Emission Inspection (Standard No. ISO 12716:2001). Available online: http://www.iso.org/standard/34090.html.
40. Acoustic Emission–Basic Principles and Future Directions10.1111/j.1475-1305.2000.tb01173.x ↗
41. Application of Acoustic Emissions in Machining Processes: Analysis and Critical Review10.1007/s00170-018-2341-y ↗
42. Characterization, Optimization, and Acoustic Emission Monitoring of Airborne Dust Emission during Wood Sawing10.1007/s00170-020-05842-5 ↗
43. Overview on Development of Acoustic Emission Monitoring Technology in Sawing10.1007/s00170-021-07559-5 ↗
44. (2009). Wood Fibre Boards. Definition, Classification and Symbols (Standard No. EN 316).
45. (2009). Fibreboards. Specifications. Part 5: Requirements for Dry Process Boards (MDF) (Standard No. EN 622-5).
46. (2015). Wood-Based Panels. Determination of Formaldehyde Release. Part 5: Extraction Method (Called the Perforator Method) (Standard No. EN ISO 12460-5).
47. (2013). Non-Destructive Testing. Acoustic Emission. Examination of Metallic Pressure Equipment During Proof Testing. Planar Location of AE Sources (Standard No. EN 14584).
48. Identification of Tool Wear Using Acoustic Emission Signal and Machine Learning Methods10.1016/j.precisioneng.2021.07.019 ↗
49. Application of Wavelet Ratio between Acoustic Emission and Cutting Force Signal Decomposing in Intelligent Monitoring of Cutting Tool Wear When Turning SKD 6110.1007/s12008-023-01571-7 ↗
50. Maia, L.H.A., Abrão, A.M., Vasconcelos, W.L., Júnior, J.L., Fernandes, G.H.N., and Machado, Á.R. (2024). Enhancing Machining Efficiency: Real-Time Monitoring of Tool Wear with Acoustic Emission and STFT Techniques. Lubricants, 12.10.3390/lubricants12110380 ↗
51. Cutting Tool Monitoring Technology Using Wireless Acoustic Emission Sensor10.20965/ijat.2024.p0812 ↗
52. Predictive Modelling of Tool Wear in CFRP Drilling Using Acoustic Emission Sensors under Dry and Cryogenic Conditions10.1016/j.wear.2025.205930 ↗
53. Intelligent Milling Tool Wear Estimation Based on Machine Learning Algorithms10.1007/s12206-024-0131-z ↗
54. Estimation of Minimum Chip Thickness in Micro Milling Using Acoustic Emission10.1177/0954405411404801 ↗