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In recent years, with increase in the number of vehicles, more and more traffic issues are becoming the focus of attention worldwide. One of the most important problems is traffic congestion. Currently, most traffic systems still use fixed-time setting for a very long cycle. These systems cannot dynamically adjust traffic light timing in response to unexpected situations such as traffic accidents,...
Efficient control schemes of Autonomous underwater vehicle (AUV) are challenging due to uncertainties and highly nonlinearities. In this paper, improved fractional order PID controller is proposed for the control of AUV motion with six degrees of freedom (DOF). Genetic algorithm and Particle Swarm Optimization (PSO) are employed to find suboptimal coefficients of FOPID controller to improve performance...
Over the past several years, Micro Aerial Vehicles (MAVs) have received considerable attentions due to many useful applications in military and civil missions. Applications such as search and rescue, mapping, and surveillance require the MAVs to autonomously follow a predefined three dimensional path. Because of unavailability of the pilot during a mission, it is necessary to use autopilot systems...
Conventional controllers like Proportional Derivative (PD), Proportional Integral (PI) and Proportional Integral Derivative (PID) controllers were used in implementing Velocity Control Mode (VCM) in Cruise Control (CC) and Adaptive Cruise control (ACC) vehicles. Transition that occur in "resume mode" of CC and transitions that occur during switching from Distance Control Mode (DCM) to VCM...
It is to study a new hierarchical intelligent control system in the vehicle's steering antilock brake stability fields in this paper. A layered control system consisting of the execution layer and the cooperation layer is designed. On the execution layer, optimal sliding mode controller based on genetic algorithms is designed for the automotive brake controller. Optimal sliding mode controller based...
A semiautomatic control system to steering a torpedo-shaped remotely operated vehicle is considered in the paper. Two independent controllers with fuzzy control law implemented are used to generate command signals assuring desired orientation of the vehicle in an underwater space. Input variables fuzzification, a base of rules, and an output set defuzzification are described. Parameters of membership...
In this work, a robust suboptimal controller for the longitudinal-motion of highly maneuverable technology (HiMAT) vehicle is presented. The controller design is centered around a linearized short period rigid model at a Mach 0.9, altitude 20,000 ft and angle of attack 1.19 deg flight condition. The weighting matrices with respect to the suboptimal control scheme, which are used to synthesize a performance...
There has been an increasing interest in a kind of underactuated mechanical systems, mobile wheeled inverted pendulum (MWIP) models, which are widely used in the field of autonomous robotics and intelligent vehicles. A novel structure including an MWIP system and a movable seat called UW-Car is proposed in the study. The dynamic model of UW-Car system running in the flat ground is obtained by applying...
Allocating software components and messages to computing devices and their interconnecting networks is a great challenge in vehicle control system development. The allocation decisions are usually made at an early development stage without the implementation details of the computing platform. To produce low-cost products with correct vehicle control, the software allocation must facilitate the final...
A semi-track air-cushion vehicle (STACV) which combines an air-cushion lifting system with a semi-track propulsion system is an efficient solution for heavy-duty vehicles working on soft terrain, such as the vehicles for agricultural, oil industrial and military purposes. Focusing on optimizing fuel economy of the vehicle, five main issues are studied in this paper. Firstly, based on the analyses...
A nonlinear control system that integrated active front steering system and vehicle dynamics control system based on a multi-body vehicle dynamic model is introduced in this paper. The multibody vehicle dynamic model based on ADAMS can accurately predict the dynamics performance of the vehicle. The control strategy consists of two control objectives (yaw velocity omega and sideslip angle beta). An...
Aiming at the minimal delay of vehicles in each direction along the artery at the expected speed of travel, this paper proposes an optimal offset model for artery traffic signal control system by analyzing the rules of two directional traffic flow delay at the intersections, which introduces the idea of bidirectional green-wave signal control. The objective function is optimized by applying the genetic...
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