本文主要探討線控四輪轉向之操控特性研究，由於沒有轉向機柱結構連結，因此可在控制核心內加入不同的車輛穩定控制策略，而本研究為加入模糊控制器，利用模糊控制法則在非線性控制上的優勢，將橫擺率以及前輪轉角的誤差作為輸入值，進而控制後輪轉角，同時將車輛之重心測滑角及橫擺率降低。本研究軟體模擬使用CarSim 模擬軟體，藉由與模糊控制器結合，增CarSim 軟體在模擬車輛動態上的準確度。本研究運用CAN Bus 通訊協定以及分散式架構來建構線控轉向系統實驗平台。利用LabVIEW 圖控程式來建立控制平台系統的人機介面並包含即時監控功能。依據車速做判斷，達到後輪低速逆相位轉向及高速同相位轉向之控制目標。並於線控實驗平台設計線控轉向之備用系統，利用鋼索以及滾輪機構設計出線控轉向之備用系統。平常線控轉向系統作動時，鋼索與線控轉向系統共同作動，在線控轉向系統喪失轉向功能時，能毫無時間差的介入線控轉向系統做轉向動作，讓駕駛者可以順利將車輛停置路邊等待救援。

This study focused on the handling characteristics of vehicles with four-wheel steer-by-wire systems. To eliminate several limitations of traditional steering systems, four-wheel steer-by-wire systems can be used to stabilize the handling characteristics of vehicles with better handling strategies for stabilizing vehicles. With this handling strategy combined with a fuzzy controller and having used fuzzy rules that were superior. The input yaw rate and front wheel angle error were used to control rear wheel angle. Simultaneously referencing sideslip angles and yaw rates signal correspondence to the desired setting. This study analyzed the stability of dynamic vehicles primarily using CarSim
combined with fuzzy controllers to improve the accuracy of dynamic vehicle imitation from CarSim.The construction of distributed steer-by-wire system experimental platforms are based on CAN Bus techniques that use LabVIEW to connect with the steer-by-wire system platform. The controller for the steering motor reaches the second control interface and uses the experimental platform to verify four-wheel steer-by-wire system. At slow speeds, the rear wheels move in the opposite
direction of the front wheels; while at high speeds, the rear wheels move
in the same direction as the front wheels. This study used cables and wheeling mechanisms in the design and implementation of the backup system. The cables and wheeling mechanisms were also applied to the experimental platform of the steer-by-wire system. The system can intervene to the steer-by-wire system as soon as possible when the steer-by-wire system has failed, because of the connection between cables and
wheeling mechanism allowing the driver to pull the vehicle over and wait for rescue on the roadside.