Dynamic programming-based multi-vehicle longitudinal trajectory optimization with simplified car following models

Trajectory Optimization for a Multistage Launch Vehicle Using Nonlinear Programming

This work is an example of application of nonlinear programming to a problem of three-dimensional trajectory optimization for multistage launch vehicles for geostationary orbit missions. The main objective is to minimize fuel consumption or equivalently to maximize the payload. The launch vehicle considered here, Europa-II, consists of 5 thrust phases and 2 coast phases. Major parameters of the...

A Study on Performance of Simplified Vehicle Models in Optimization of Hydraulic Engine Mounts in Comparison with Full-Vehicle Model

Trajectory-Based Dynamic Programming

This paper reviews a variety of ways to use trajectory optimization to accelerate dynamic programming. Dynamic programming provides a way to design globally optimal control laws for nonlinear systems. However, the curse of dimensionality, the exponential dependence of space and computation resources needed on the dimensionality of the state and control, limits the application of dynamic program...

Calibrating Car-Following Models using Trajectory Data: Methodological Study

The car-following behavior of individual drivers in real city traffic is studied on the basis of (publicly available) trajectory datasets recorded by a vehicle equipped with an radar sensor. By means of a nonlinear optimization procedure based on a genetic algorithm, we calibrate the Intelligent Driver Model and the Velocity Difference Model by minimizing the deviations between the observed dri...

Vision-Based Vehicle Trajectory Following with Constant Time Delay

A convoy problem is formulated and solved for two four-wheeled vehicles. The task is for the second vehicle to follow the leader’s trajectory with a constant time delay. This delayed trajectory can be viewed as the trajectory of a delayed leader. This novel constant-time-delay concept allows for the estimation of the delayed leader’s speed and heading using the vehicle kinematics. Decoupled lon...