Topic
Guidance system
About: Guidance system is a research topic. Over the lifetime, 4282 publications have been published within this topic receiving 45964 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, an incident data base was compiled, based on modelling of several incident/network/ traffic scenarios using a simulation tool, and generalized statistical models were then developed for predicting the spread of congestion effects following an incident and the required travel time modifications on the incident link and on affected links.
12 citations
03 Mar 2018
TL;DR: The goal was to develop a high-fidelity multiphysical simulation of such a HAPS, including a long-term mission planner, a reactive guidance system for weather avoidance, a flight control system with protections, a 6-DoF model with solar-electric propulsion system, and a comprehensive environment simulation with 4-D wind and turbulence.
Abstract: With advances made in the fields of energy generation from renewable sources, airborne electrical propulsion, and autonomous system operation, much activity has been directed towards the development of so called high altitude pseudo satellites (HAPS) in recent years, with Zephyr (Airbus) and Aquila (Facebook) as prominent examples. Compared to classical orbital satellites, these are designed to require lower deployment costs and to offer a high flexibility in operational tasks and a long mission endurance. In the project StraVARIA, the goal was to develop a high-fidelity multiphysical simulation of such a HAPS, including a long-term mission planner, a reactive guidance system for weather avoidance, a flight control system with protections, a 6-DoF model with solar-electric propulsion system, and a comprehensive environment simulation with 4-D wind and turbulence. Due to the long mission duration, the mission planner and guidance system offer an increased autonomy level compared to standard operator controlled UAVs, however human input is still required for high level planning. The acausal and object-oriented modeling language Modelica has been used to create the integrated simulation model, enabling a modular and detailed modeling approach. By automatic code generation and optimization, simulation efficiency is improved, which is an important factor when considering long-term missions. Results of the integrated simulation show that missions like area surveillance and communication relay are possible whenever adverse weather conditions can be avoided. Ascending to and descending from mission altitude of approximately 18 km also poses a threat to the lightweight HAPS construction since layers of stronger winds and atmospheric disturbance have to be passed. To this end, simulated example missions over Bavaria are presented showcasing these effects, where mission success is ensured by means of the long term mission planner, the reactive guidance, and the inner-level protections implemented in the flight control system.
12 citations
TL;DR: It is confirmed that haptic guidance can improve the risk-predictive driving performance for a slowdown task via the one-pedal driving mode.
Abstract: The research presented in this article focuses on the design of a driver support system for risk-predictive driving under a potentially hazardous situation for a pedestrian who crosses a road from the driver’s blind spots. Our aim is to develop a system that would cooperate with the driver in leading the normative speed calculated by the co-driver function. The design philosophy of haptic guidance is to communicate to the drivers the potentially hazardous situation through tactile cues from the active gas pedal and to assist drivers to in preparing for possible road surprises. We intended to combine the algorithm of the haptic feedback loop with the functionality of the one-pedal driving mode interface. Three design issues for the haptic guidance system can be distinguished: the design of a one-pedal driving mode based on a one-pedal operation; the modeling of risk-predictive driving behavior; and the haptic feedback algorithm with active gas pedal. We tested our system in human-in-the-loop experiments in a driving simulator to investigate (1) the effect of the one-pedal driving mode interface on the driver behavior and (2) the effect of haptic guidance support on the driver behavior. From the results of our experiments, we confirmed that haptic guidance can improve the risk-predictive driving performance for a slowdown task via the one-pedal driving mode.
12 citations
TL;DR: In this paper, a guidance control law for an underactuated 3D kinematics model of an underwater vehicle subject to constant, but unknown currents is designed for AUVs.
12 citations
Patent•
25 Mar 2003TL;DR: In this article, a chemical distribution such as a mosquito control guidance system is operable for controlling the distribution of airborne product via an aircraft passing over a target field, which includes a weather station carried by a helium balloon positioned at aircraft altitude.
Abstract: A chemical distribution such as a mosquito control guidance system is operable for controlling the distribution of airborne product via an aircraft passing over a target field. The system includes a weather station carried by a helium balloon positioned at aircraft altitude which communicates with a ground weather station positioned at or near the target field for transmitting weather data in real time to a central communications station and the aircraft for providing guidance in accurately, safely and effectively distributing chemicals onto the target field.
12 citations