Four-Bar Linkage Path Generation Problems Using a New TLBO and Optimum Path Repairing Technique

Area of Science:

• Mechanical Engineering
• Computational Intelligence
• Optimization Algorithms

Background:

• The four-bar linkage path generation problem is crucial in mechanism design.
• Existing methods like ATLBO-DA with PRT show promise but require enhancement.
• Improved optimization and path repairing are needed for complex synthesis tasks.

Purpose of the Study:

• To introduce an upgraded optimization algorithm, ATLBO-EFA, and a novel path repairing technique, OPRT.
• To enhance the exploration and exploitation capabilities of the Teaching-Learning-Based Optimization (TLBO) algorithm.
• To provide a superior solution for the four-bar linkage path synthesis problem.

Main Methods:

• Developed ATLBO-EFA by replacing the diversity archive with an evenness factor archive.
• Introduced OPRT utilizing the Degree of Limiting (DL) concept for mechanism type selection.
• Conducted comparative analysis between ATLBO-EFA/OPRT and the previous ATLBO-DA/PRT on various path generation problems.

Main Results:

• ATLBO-EFA with OPRT consistently outperformed the original version in solving four-bar linkage path generation problems.
• The updated technique yielded superior mean and minimum descriptive statistics.
• Friedman test confirmed ATLBO-EFA's top ranking (p=0.0455 < α=0.05).

Conclusions:

• ATLBO-EFA and OPRT represent a significant advancement over previous methods.
• The proposed approach offers a more effective and robust solution for four-bar path synthesis.
• The evenness factor archive enhances TLBO's performance in complex optimization tasks.