Intelligent Transportation Systems

An Energy-Based Flight Planning System for Unmanned Traffic Management

Liu, Zhilong
Sengupta, Raja
2017

In this paper, we proposed an energy-based flight planning system for Unmanned Aircraft Systems (UAS) Traffic Management (UTM). Fuel consumption estimation at the flight planning stage is safety critical in general aviation, because energy-related failures are often life-threatening. However, conservative fuel estimation is not economical and environmentally friendly because carrying unnecessary fuel load burns a lot of extra fuel. The same reasoning holds in UTM. Aviation researchers are actively working on optimizing fuel loading, but such research is lacking in UTM. In this paper, we...

An Unmanned Aerial Traffic Management Solution for Cities Using an Air Parcel Model

Foina, Aislan Gomide
Krainer, Clemens
Sengupta, Raja
2015

The Unmanned Aerial System (UAS) market once belonged to professional companies only. Now many amateur pilots fly cheap, smartphone controlled models available in any electronic store. Due to altitude, speed, and weight, these flying objects can cause damage and injury. Hence, a way to manage them is necessary. This paper presents a UAS Traffic Management (UTM) system comprising three components: a UAS electronic identification plate with an embedded logger, a ground identification equipment, and a Traffic Routing System (TRS). This UTM system uses the air parcel model, which divides the...

Benefit Evaluation of Crash Avoidance Systems

Godbole, Datta N.
Sengupta, Raja
Misener, James
Kourjanskaia, Natasha
Michael, James B.
1998

A five-layer hierarchy to integrate models, data, and tools is proposed for benefits assessment and requirements development for crash avoidance systems. The framework is known as HARTCAS: Hierarchical Assessment and Requirements Tools for Crash Avoidance Systems. The analysis problem is multifaceted and large-scale. The driving environment is diverse and uncertain, driver behavior and performance are not uniform, and the range of applicable collision avoidance technologies is wide. Considerable real-world data are becoming available on certain aspects of this environment, although the...

Cloud Computing in Space

Huang, Jiangchuan
Kirsch, Christoph M.
Sengupta, Raja
2015

We apply virtual machine abstractions to networked vehicles, enabling what we call cloud computing in space to create performance isolation between customers. In analogy to conventional system virtualization and cloud computing, there are customer-operated virtual vehicles that essentially perform like real vehicles, although they are in reality hosted by fewer, shared, provider-operated real vehicles. The motion of the virtual vehicles and real vehicles creates migration gain. As a result, cloud computing in space can do better than conventional cloud computing in the sense of realizing...

Cooperative High-Accuracy Location (C-HALO) Service for Intelligent Transportation Systems: A Cost Benefit Study

Goodliss, Adam
Manasseh, Christian
Ekambaram, Venkatesan N.
Sengupta, Raja
Ramchandran, Kannan
2011

This paper presents a cost benefit study of a Cooperative High-Accuracy LOcation (C-HALO) service as a nationwide service capable of providing decimeter level positioning accuracy to enable several new applications across various industries. We survey and summarize work by others quantifying the benefits reaped from enabling applications that require C-HALO. However, benefits to the economy from enabling C-HALO for Intelligent Transportation Systems (ITS) have not been quantified in the literature. This study estimates these benefits. We also provide an order of magnitude rough estimate of...

Crowd Sourcing Indoor Maps with Mobile Sensors

Xuan, Yiguang
Sengupta, Raja
Fallah, Yaser
2012

The paper describes algorithms required to enable the crowd sourcing of indoor building maps, i.e., where GPS is not available. Nevertheless to enable crowd sourcing we use the 3-axis accelerometers and the 3-axis magnetometers available in many smart phones and the piezometer in a Nike running shoe. Volunteers carry the sensors while walking around in buildings, and use some application on their smart phone to send the data to a mapping server. We present the algorithms to obtain walking trajectories from the data by dead reckoning, and to estimate indoor maps with multiple walking...

Decentralized Error-Dependent Transmission Control for Model-Based Estimation Over a Multi-Access Network

Huang, Ching-Ling
Sengupta, Raja
2008

This paper is motivated by the estimation problem and active safety design for ITS. We investigate the performance of model-based estimation over a multi-access network and emphasizes on asymptotic time-averaged MSE while using error-dependent transmission control. The performance of this decentralized policy is analyzed and an improved policy is also proposed to achieve robustness in a shared channel. Our results suggest that, while designing communication logic for vehicular safety applications, dynamics of the system and channel congestion should be considered at the same time.

Distributing Synchronous Systems with Modular Structure

Zennaro, M.
Sengupta, R.
2004

Synchronous programs were introduced to simplify the development of reactive systems hiding the complexity and indeterminism of the interleaving while taking full advantage of possible concurrency. The introduction of communication networks enabled the creation of distributed systems presenting the programmer with a new burden of interleaving and nondeterminism due to the asynchronous communication medium. Again this complexity should be hidden from the user while taking full advantage of the possible concurrency to improve performance. Many algorithms for the automatic distributions of...

Drones in Smart Cities: Overcoming Barriers Through Air Traffic Control Research

Foina, Aislan Gomide
Sengupta, Raja
Lerchi, Patrick
Liu, Zhilong
Krainer, Clemens
2015

Within the last decade, the recent automation of vehicles such as cars and planes promise to fundamentally alter the microeconomics of transporting people and goods. In this paper, we focus on the self-flying planes (drones), which have been renamed Unmanned Aerial System (UAS) by the US Federal Aviation Agency (FAA). The most controversial operations envisaged by the UAS industry are small, low-altitude UAS flights in densely populated cities - robotic aircraft flying in the midst of public spaces to deliver goods and information. This subset of robotic flight would be the most valuable...

Failure Diagnosis of Dynamic Systems: An Approach Based on Discrete Event Systems

Lafortune, S.
Teneketzis, D.
Sampath, M.
Sengupta, R.
Sinnamohideen, K.
2001

We present the salient features of a methodology for failure diagnosis of dynamic systems that can be modeled as discrete event systems. This methodology was introduced by Sampath et al. for centralized systems and subsequently extended by Debouk et al. (2000) for certain classes of decentralized systems. We discuss how to perform detection and identification of unobservable fault events using diagnosers, which are finite-state automata that are built from the discrete-event model of the system under consideration. Examples of diagnosers are given. Comparisons with other methodologies for...