Vehicle variable-speed cruise control method under wireless communication channel attenuation

Abstract

A vehicle variable-speed cruise control method under wireless communication channel attenuation includes the following steps: 1) establishing a third-order dynamic mathematical model of vehicle variable-speed cruise control; 2) defining x1=[beta1, beta1<.>, alpha1]<T> to obtain a vehicle variable-speed cruise control system state space model; 3) defining the vehicle distance, the speed and the acceleration control function of the variable-speed cruise system at the time t under the wireless communication channel attenuation; 4), giving real numbers rho1 and lambda, solving a real matrix P=P<-><T>>= 0, Q<->=Q<-><T>>= 0 and V to satisfy a linear matrix inequality; and 5) obtaining a distance difference and a speed difference between a host vehicle and a vehicle ahead, and the acceleration ofthe vehicle ahead, calculating the acceleration, the speed and the distance control amount of the host vehicle in real time, driving the host vehicle to follow the motion state of the vehicle ahead,and repeating the process to achieve vehicle variable-speed cruise control with high real-time performance and high accuracy under the wireless communication channel attenuation. The method considersthe channel attenuation characteristics of the vehicle during driving, thereby well achieving a vehicle variable-speed cruise control target.

Description

technical field [0001] The invention relates to a vehicle variable speed cruise control method, in particular to a vehicle variable speed cruise control method under wireless communication channel attenuation. Background technique [0002] The variable speed cruise control of the vehicle is to collect the vehicle driving information of the vehicle in front and the vehicle through the vehicle sensor such as radar, and then establish the vehicle safety distance, speed and acceleration model, input the collected driving information of the vehicle in front and the vehicle into the model, and control the speed of the vehicle , acceleration, a control method to realize the automatic driving of the vehicle. The variable speed cruise control of the vehicle prevents the driver from being in a state of tension all the time, improves the driver's driving safety and comfort, and can reduce traffic congestion at the same time. However, since this control method uses the vehicle-mounted ...

AI Technical Summary

Problems solved by technology

Among them, PID control will cause severe jitter when following the car under channel attenuation, which has a great impact on the comfort and safety of following the car; fuzzy synovial film control is a control that combines synovial film structure control and fuzzy structure control method, compared with the PID control method, the jitter of this control method has been improved to a certain extent, but the simulation results such as the change of speed are still not smooth changes; H ∞ The control model is more complex, and the amount of calculation is relatively large

Therefore, although some achievements have been made in the research of variable speed cruise control under wireless communication channel attenuation, many scholars still conduct detailed research on this issue, making the control method meet the requirements of more complex environments and more precise vehicle control.

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