1. 研究目的与意义（文献综述）

the full name of the repair vehicle is road repair vehicle, also known as trailer, road rescue vehicle, towing vehicle, with lifting, pulling and lifting traction and other functions, the repair vehicle is mainly used for road fault vehicles, urban vehicles and illegal rescue and rescue.

road clearance and rescue technology originated from the united states, where road traffic is very developed. as early as the 1950s, the world's first repair truck was produced. this beginning marks the beginning of the development history of repair trucks.the vehicle is mainly used to remove road obstacles, clean up the accident vehicles, clean up the urban environment, and provide assistance and rescue services to drivers and vehicles.widely used in highways, urban construction, auto repair industry, airports, ports and highway companies and other departments.it is also used for special transportation functions of "trouble-free vehicles".the first stage of the development of the repair vehicle is characterized by single function and simple structure. in this stage, self-made chassis is often adopted.in the second stage, with the introduction of hydraulic transmission and control technology as the mark, from the 1950s to the 1970s, a number of well-known breakdown vehicle enterprises emerged, such as america's entury, challenger, jerr-dan, wrecker, australia's empl, japan's tokyu, and canada's nrc.at this stage, the variety, scale, structure and chassis of the series of repair vehicles are increased.the third stage, from the 1980s to the present, is a period of rapid development.the fourth stage, working ability is bigger, operating mode is more advanced, working environment is more comfortable.

i. technical status of repair vehicles at home and abroad

2. 研究的基本内容与方案

1. using catia to design the loading system for the 2-ton folding flat-bed car, and draw design drawings;

2. using the dmu module of catia to carry out motion simulation for the mounted system of the 2-ton folding flat-panel repair truck;

3. use cae software to conduct finite element analysis on the top system of the 2-ton folding flat platform repair truck;

3. 研究计划与安排

schedule(weekly)

1-2 project conception, document retrieval, document retrieval of the opening report and the opening report

2-4 foreign language translation, data collection and foreign language translation

4. 参考文献（12篇以上）

[1] the general pickup and delivery problem. m. sol , m.w.p. savelsbergh.

[2] modified flatbed tow truck model for stable and safe platooning in

presences of lags, communication and sensing delays. alan ali, gaetan garcia and philippe martinet.