複合動力機車系統建模與參數最佳化

Hybrid Electric Scooter System Modeling and Parameter Optimization

林苑婷(Yuan-Ting Lin)

指導教授 ： 曾全佑

國立屏東科技大學/工學院/車輛工程系所/碩士(2009年)

https://doi.org/10.6346/NPUST.2009.00048

摘要

為了有效設計及開發不同規格之動力組合之複合動力機車系統，並瞭解其動態特性，準確評估其省油效能及最佳動力分配，必須先建立合理的複合動力機車系統模擬模型，但因機車系統為非線性且複雜，完全以數學模型建立模型，將使模型過於複雜且參數過多，難以完全取得。本論文共分為兩個項目，首先針對具機械式無段變速機構(CVT)之複合動力機車系統，建立數值模擬模型，並且探討最佳化設計之法。本研究之複合動力機車，主要由125c.c.燃料噴射引擎(fuel injection internal combustion engine)、發電機、離合器、無段變速系統、最終傳動機構及動力輔助馬達所組成，本研究將以結合數學模型，物理特性方程式，以及實驗數據所構成之混合模型，建立該複合動力機車系統之模擬模型，並分別在Hardware-in-the-Loop (HIL)實驗平台，以及實車在機車底盤動力計上進行實驗，以驗證所建立模型之正確性。本論文之第二個工作項目為，發展一種整合前饋式類神經網路架構(Feedforward neural networks, FNN)與動態規劃(Dynamic Programming, DP)法之能量管理參數最佳化演算法，以便獲得複合動力機車之全域最佳動力分配值，並探討不同成本函數(Cost function)的定義及權重對於整體油耗及能量損耗之影響，以作為未來開發複合動力機車之參考。

關鍵字

複合動力機車 ； 動態規劃 ； 前饋式類神經網路

並列摘要

The works of this thesis are divided into two parts. Firstly, a dynamic simulation model for hybrid electric scooters (HES) is developed. Attention is paid to the prediction of key parameters of the scooter such as the engine speed, CVT gear ratio, and fuel consumption on the ECE40 drive cycle in order to evaluate the performance of the HES. The scooter studied in this research consists of an electronically controlled fuel injection internal combustion engine (ICE), a generator, clutch, final drive gears, a power assistant motor, and a mechanical-type continuously variable transmission (CVT). Due to the system being complicated and nonlinear in nature, the simulation model is simultaneously constructed using mathematical models, empirical equations, and experimental data. The effectiveness of the model was verified experimentally using a scooter hardware-in-the-loop (HIL) system, as well as using a HES running on chassis dynamometer. With the developed dynamic simulation model, the second part of this thesis is to develop a parameter optimization algorithm for the energy management system (EMS) of the HES. The proposed algorithm integrates the dynamic programming (DP) method with a feedforward neural network (FNN), which is intended to determine the global optimal values of the power split ratio of the HES on the ECE40 drive cycles. Based on the algorithm, the effects of different cost functions with various weight coefficients on the fuel consumption rate were discussed.

並列關鍵字

Hybrid Electric Scooter ； Dynamic Programming ； Feedforward Neural Network

參考文獻

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