Development of a parametric design and optimization platform for a helicopter tail-rotor driveline

Abstract

A helicopter tail-rotor driveline incorporates multiple shafts, couplings, and dampers to transmit power from the middle gear to the tail propeller. Designers face a challenge in adjusting parameters for these components due to a lack of reference information on parameter design and optimization. To address this gap, this study presents a parametric design software platform for facilitating parameter analysis and optimization. A mathematical model is developed to capture the system behavior and precise boundary conditions, considering all relevant components and their interactions. The software design issues, basic modules, architecture, and interfaces are developed using MATLAB App Designer. Generative design is employed to create a damper's parameters optimization function, combining a design-driven process with analytical calculations and expandable multi-objective algorithms. A numerical calculation module and a response analysis module are designed to present comprehensive dynamic responses. The software is utilized to simulate a helicopter tail-rotor driveline, providing insights into multi-stage damping characteristics and the combined effects of rub impact and misalignment. A multi-objective optimization case is conducted by generative design module to enhance damping and durability of the damper. The simulation results of the software are validated using test results from a test rig designed to mimic an actual helicopter tail-rotor driveline. This study serves as a valuable reference for software development in shaft/damper systems and similar rotor machinery.