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Automatic lane detection is known to facilitate the real-time traffic planning and identify traffic congestion. In this paper, we develop a visual surveillance trajectory clustering (VSTC) framework for automatic lane detection. Given a surveillance video, trajectories of vehicles are extracted at first. These trajectories contain behavior of vehicles on different lanes and are clustered by VSTC to...
This paper presents a mixed variable variational algorithm to the optimal atmospheric ascent guidance problem of launch vehicles subject to path constraints and final condition constraints. The optimal three-dimension ascent problem is transformed into a Hamiltonian boundary value problem. And the solving algorithm is a symplectic numerical method based on the dual variational principle, which transforms...
Under the requirements of desired terminal position changing and on-line reconfigurable control and guidance, an on-board trajectory generation technology based on the footprint analysis for a glide vehicle with a double-pulse rocket engine is presented in this paper. It is firstly judged by footprint analysis to determine whether the new target is within the old footprint area. If not, the rocket...
After studying the existing methods of collision detection and early warning, a vehicle auxiliary anti-collision warning system based on positioning in electronic map is proposed. In this system, OBD, GPS, vehicle sensor and wireless LAN technologies are used to obtain the driving information of a vehicle itself and other vehicles around, and map positioning technologies to display the positions of...
Precision linearization control of IPMSM system is realized with nonlinear state feedback and coordinates transformation. The IPMSM is decomposed into two linear subsystems, d-axis flux subsystem and rotation speed subsystem. Simulation results show that IPMSM control system based on the design of input and output decoupling and linearization achieves high dynamic performance than the ordinary field...
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