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2023 | Buch

Vehicle Steer-by-Wire System and Chassis Integration

verfasst von: Wanzhong Zhao

Verlag: Springer Nature Singapore

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SUCHEN

Über dieses Buch

This book focuses on the control-by-wire system, particularly the steer-by-wire system, as well as its control and optimization issues in chassis integration. The steering stability of the vehicle, handling portability, and overall performance of the chassis system are improved by steer-by-wire technology, which includes stability control, road-feeling control, decoupling control, force and displacement coordinated control, and chassis integration optimization. Furthermore, intelligent control goals such as active collision avoidance and active rollover prevention of the vehicle are realized, and the active safety of the vehicle is increased, due to the integrated control of the steer-by-wire system and chassis system. In this book, different types of steer-by-wire systems are introduced, as well as thorough force and displacement control strategies and their implementation in chassis integrated control, ensuring the intelligent and unmanned driving's control reaction speed and precision.

Inhaltsverzeichnis

Frontmatter
Chapter 1. Active Steering System
Abstract
Due to the unchangeable transmission ratio of the traditional mechanical steering system, it has the disadvantage of heavy steering load at low speeds and floating steering at high speeds, which affects the driver’s driving experience and is easy to cause vehicle instability under extreme driving conditions. In order to improve the driver steering feel, the electric power steering system has been widely popularized in all kinds of passenger vehicles.
Wanzhong Zhao
Chapter 2. Front-Wheel Steer-By-Wire System
Abstract
The basic structure of the front-wheel steer-by-wire (SBW) system is shown in Fig. 2.1. Different from the active steering system, its main feature is that the mechanical connection between the steering wheel and the front wheels is canceled, so it is also called the flexible steering system.
Wanzhong Zhao
Chapter 3. Differential Steering System
Abstract
The differential steering is a new steer-by-wire technology developed based on the full control-by-wire control chassis structure. For conventional cars, the left and right steering wheels on well symmetrical roads produce roughly equal driving torque in opposite directions, and thus offset each other under mechanical steering trapezoidal connections.
Wanzhong Zhao
Chapter 4. Electro Hydraulic Hybrid Power Steering System
Abstract
Large commercial vehicles often need to travel for a long time and a long distance, so the steering system of commercial vehicles must have characteristics of low energy consumption and good steering feeling. However, the existing electronically controlled hydraulic power steering (ECHPS) system and electro-hydraulic power steering (EHPS) system and electric power steering (EPS) system are difficult to meet design requirements of steering system of large electric commercial vehicles in the future. The electro hydraulic hybrid power steer-by-wire system developed on the basis of the above steering system adopts dual actuator design.
Wanzhong Zhao
Chapter 5. Distributed Steer-By-Wire System
Abstract
With the development of electronic control technology and automation technology, a four-wheel steer-by-wire (SBW) system with both front and rear SBW has been developed based on the front SBW system.
Wanzhong Zhao
Chapter 6. Integrated Optimization of Differential Steering Chassis by Wire
Abstract
The differential steer-by-wire system is a new type of steer-by-wire system developed based on the full chassis-by-wire system. On the basis of the traditional mechanical steering mechanism, the driving force difference between the two front wheels of the chassis-by-wire is used for steering assistance, and the driving force difference between the two rear wheels is used for steering stability control. According to its operation principle, the steering system and the drive/brake system of the chassis by wire act simultaneously in the steering process.
Wanzhong Zhao
Chapter 7. Active Collision Avoidance Control of Wired Chassis System
Abstract
The vehicle active collision avoidance technology is an advanced intelligent assistant driving technology. When the vehicle is driving, ECU detects the obstacle around by the sensor data and judges the possibility of collision; when the collision is about to happen, active steering or braking are operated to avoid obstacles, improve driving safety and traffic efficiency. By controlling the steering motor connected with the planetary gear structure, the steer-by-wire system can add an active angle to the steering system based on the input of the driver, and thus the functions of steering intervention and stability control are realized, which is an important way to realize active collision avoidance control.
Wanzhong Zhao
Chapter 8. Active Anti-rollover Control of Wired Chassis
Abstract
High centroid SUV vehicles are becoming more and more popular in the market. Due to their high centroid, such vehicles have higher rollover risk at the same speed as ordinary hatchback cars, and drivers often ignore this factor, which often leads to rollover accidents. The research shows that when the vehicle speed is not too high and the lateral acceleration is not very large, the active steering plays a good control role in the stability and handling of the vehicle, and can effectively improve the anti-rollover performance of the vehicle. However, when the vehicle speed is high and the lateral acceleration is large, the anti-rollover effect of the active steering system is becoming smaller and smaller.
Wanzhong Zhao
Metadaten
Titel
Vehicle Steer-by-Wire System and Chassis Integration
verfasst von
Wanzhong Zhao
Copyright-Jahr
2023
Verlag
Springer Nature Singapore
Electronic ISBN
978-981-19-4250-1
Print ISBN
978-981-19-4249-5
DOI
https://doi.org/10.1007/978-981-19-4250-1

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