- 期刊
Speed Ratio Tracking Strategy of an Improved HMCVT for Commercial Vehicles
一種改進的商用HMCVT及其速比跟蹤策略研究
摘要
The traditional hydro-mechanical continuously variable transmission (HMCVT) is mainly used in off-highway vehicles such as tractors. This paper proposes an improved HMCVT that is suitable for commercial vehicles. It has the same functions as the current commercial vehicle automatic transmission while making commercial vehicles overcome muddy roads like tractors. Furthermore, this paper analyzes the torque, speed, and power characteristics of the improved HMCVT, and proposes a sliding mode control strategy based on H_∞ to solve the problem of speed ratio tracking. It reduces the inherent chattering characteristics of sliding mode control while ensuring the accuracy and real-time performance of speed ratio tracking. Finally, this paper carries out the simulation verification by MATLAB/Simulink and compares with the PID speed ratio tracking method, which confirms the excellent performance of the strategy proposed in this paper.
並列摘要
傳統的液力機械無級變速器（HMCVT）主要用於拖拉機等非公路車輛。本文提出了一種適用於商用車的改進了的HMCVT。它具有與目前商用車自動變速箱相同的功能，同時可以使商用車像拖拉機一樣克服泥濘的道路。本文在進一步分析了改進後的HMCVT的轉矩、轉速和功率特性的基礎上，提出了一種基於H_∞的滑模控製策略來解決速比跟蹤問題。它抑製了滑模控製固有的抖振特性，同時保證了速比跟蹤的準確性和實時性。最後，本文通過MATLAB／Simulink進行仿真驗證，並與PID速比跟蹤方法進行對比，證明了本文提出的策略的優越性。