M. Uijt de Haag

M. Uijt de Haag
Technische Universität Berlin | TUB · Department of Aeronautics and Astronautics

Ph.D.

About

181
Publications
22,111
Reads
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973
Citations
Citations since 2017
47 Research Items
377 Citations
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20172018201920202021202220230204060

Publications

Publications (181)
Article
This paper proposes an individual aircraft emission estimation method that uses a multimodel approach based on the widely accepted Base of Aircraft Data model. With the identification of the influences, the baseline aircraft model was enhanced by an atmospheric model, which merges an airport database with Version 2 of the Modern-Era Retrospective A...
Conference Paper
View Video Presentation: https://doi.org/10.2514/6.2022-0435.vid In this paper we analyze the applicability of Detect-And-Avoid (DAA) approaches for small Unmanned Aircraft Systems (sUAS) operating in non-segregated Very-Low-Level (VLL) airspace in the vicinity of uncontrolled airfields. Although the issue of DAA capabilities of UAS has been identi...
Conference Paper
View Video Presentation: https://doi.org/10.2514/6.2022-0436.vid Other than engine fuel burn, the aircraft engine lubricating oil consumption is sparsely addressed in the present open literature. Nevertheless, while operating an engine, oil losses to the environment cannot be prevented. That implies an alteration in air parcel consumption and, thus...
Poster
Full-text available
Prgram of the Nov. 4th 2021 online workshop
Cover Page
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Subscribe to newsletter on: https://seu2.cleverreach.com/f/300552-302767/ EuroGNC is the biannual conference for the international community of researchers and practitioners in the field of aerospace guidance, navigation and control. It provides a platform to discuss latest research results, perspectives on future developments and innovative appli...
Article
Full-text available
When using GNSS navigation for final approach guidance of aircraft to a landing site, the only systems currently available are differential GNSS with additional integrity data called augmentation systems. These work well when the landing site is fixed in space and well surveyed. In all other cases, augmentation systems are difficult to use. Here, w...
Chapter
This chapter describes a global navigation satellite system/inertial measurement unit (GNSS/IMU) integration unlike all others preceding it, placing robustness, flexibility, and interoperability first among all considerations. The topology of the filter is segmented, with sequential changes incarrier phase used for dynamics only, to provide precise...
Chapter
This chapter focuses on capabilities needed to automatically enforce geospatial constraints as a means of avoiding static obstacles and specified locations designated as no‐fly zones. Examples of no‐fly zones for most commercial Unmanned Aircraft Systems (UAS) are airports, military bases, urban environments, and densely populated areas. The chapte...
Chapter
Laser‐based sensors have been used extensively in robotics and aerospace applications for a variety of tasks, including navigation, collision avoidance, and mapping. This chapter discusses the use of laser‐based sensors in estimating the platform pose, and in some cases, the change of pose over time. It begins with a short overview of laser ranging...
Conference Paper
Unmanned aerial systems (UAS) are used for a wide variety of applications, including agriculture, law enforcement, search and rescue, mapping, and journalism. The number of applications can be expected to increase in the near future, as is the impact of such systems on the environment-urban or rural. Moreover, unknown UAS penetrating airport areas...
Conference Paper
The use of unmanned aerial systems (UAS) or drones for a wide variety of applications, such as law enforcement, search and rescue, agriculture, infrastructure inspection, mapping, filming and journalism has become common. As it can be expected that the number of applications will increase in the near future, the impact of these systems on the envir...
Conference Paper
Full-text available
This paper discusses the flight test setup and preliminary results of a precise relative navigation and separation assurance system to support safe simultaneous operation of general aviation aircraft and UAS at low altitudes in the vicinity of an uncontrolled airfield. With an increased use of UAS for a wide variety of applications, such as law enf...
Conference Paper
Full-text available
The paper discusses the preliminary analysis of an urban availability tool required for preflight flight planning. In this tool, areas in an urban environment are assessed with respect to GNSS availability, separation to traffic and obstacles, impact of UAS noise, and various other criteria. GNSS availability will drive the necessity to include alt...
Article
This paper proposes an optimization framework that computes conflict-free optimal trajectories in dense terminal airspace, while continuously monitoring trajectory conformance in an effort to improve predictability. The objective is to allow, as much as possible, continuous vertical trajectory profiles without impacting negatively on airspace capac...
Article
This paper discusses the use of 3D corner features extracted from a 2D Laser scanner as landmarks in a simultaneous localization and mapping solution. The corner landmarks can be identified and tracked using their angles, and the observations of the corners are directly used to correct attitude errors. The proposed method can be used to navigate a...
Article
This paper discusses the estimation algorithms for Three-Dimensional (3D) displacement and 3D rotation using Two-Dimensional (2D) laser scanners. An efficient outlier detection method is proposed for both algorithms to help protect the integrity of navigation. The algorithms have been evaluated using both simulation and field test results. They are...
Article
Global Positioning System (GPS) surface reflected signals have previously been studied for aircraft passive bistatic altimetry and remote sensing. In this research, GPS reflected measurements from a software-defined receiver (SDR) are used for aircraft passive bistatic altimetry and coasting with a Stable Frequency Reference (SFR) to continue navig...
Article
Full-text available
We investigate the feasibility of completing an aircraft precision approach using two global navigation satellite systems (GNSS) satellites from different constellations in combination with a stable frequency reference (SFR), barometric height and a radar altimeter. Before the start of two-satellite positioning, a full GNSS solution is used to cali...
Article
As the use of unmanned aerial vehicles has become more prevalent, the need for a reliable three-dimensional positioning and navigation capability is required to enable operation in challenging environments where the Global Positioning System (GPS) may not be available. For many of these environments, there may not be one particular method to solve...
Conference Paper
This paper discusses a positioning and navigation algorithm to support autonomous flight of a small-size unmanned aircraft system in a structured GNSS-denied environment during a maintenance mission. The proposed method is based on the integration of depth imagery and outputs from an inertial measurement unit (IMU). In addition, 2D images of a low...
Conference Paper
This paper discusses the preliminary design and implementation of a simultaneous navigation, and mapping method for operation of multi-copter unmanned aircraft systems (UAS) in forest environments under the canopy. A data collection platform has been developed using a 3DR hexacopter platform equipped with laser scanners, cameras, GNSS and inertial...
Article
This paper describes a Multiple Hypothesis Prediction (MHP) method that is used to improve aircraft state (energy and attitude) and automation mode awareness. The paper specifically focuses on its application for mode awareness during the use of the Vertical Navigation (VNAV) function. VNAV is used during the majority of the flight phases to govern...
Article
System degradation due to sensor failures has been a contributing factor in many aircraft accidents. For example, an autopilot (A/P) disconnect due to incorrect airspeed data was a primary factor in the events leading to the crash of Air France Flight 447 (AF447) into the Atlantic Ocean. Similarly, on Turkish Airlines Flight 1951 (TK1951) a faulty...
Conference Paper
Full-text available
For Unmanned Aircraft Systems to meet the intent of the Federal Aviation Regulations, a technical solution is being developed to enable a Sense and Avoid capability. To contribute to a reduction in the overall Near Mid Air Collision encounter probability, the intended function of conflict probe displays is to provide the pilots with increased aware...
Conference Paper
Full-text available
In an effort to improve the efficiency of air traffic operations, whilst reducing the envi- ronmental impact on aviation and increase capacity, 4D trajectory optimisation has shown good potential. In previous research the authors have described a framework where complex departure routes can be optimised, producing conict free fuel optimal trajector...
Conference Paper
Full-text available
The basis for a conflict probe display is the function which computes the 3-D locations where a conflict exists if ownship were to travel in that direction. The conflict space that is computed by the probe depends on the definition of its boundary. Initial implementations of conflict probe displays used a spatial separation threshold such as, for e...
Article
Full-text available
This paper discusses the development of navigation algorithms to enable seamless operation of a small-size multi-copter in an indoor-outdoor environment. In urban and indoor environments a GPS position capability may be unavailable not only due to shadowing, significant signal attenuation or multipath, but also due to intentional denial or deceptio...
Conference Paper
Full-text available
This paper discusses an integrated dual airborne laser scanner (DALS)/inertial (INS) navigator for Unmanned Aerial Vehicles (UAV). The discussed navigator enables UAV operations over environments for which no a priori terrain data is available and trajectories for which loop closure is not a possibility. The system was designed, implemented and, in...
Article
This paper discusses the extraction of 3D corner features using 2D Laser scanners, and the potential applications of these corner features in an integrated navigation solution. Compared against a 3D flash Laser Detection and Ranging (LADAR), a 2D laser scanner has advantages in terms of cost, range and resolution. A 2D laser scanner can be used to...
Conference Paper
Full-text available
• Conflict Probes can be used to aid the pilot in performing Sense and Avoid functions • Well Clear can be considered a separation standard - Spatial and Temporal considerations should be used to define WCV • Conflict Probes can accommodate Spatial and Temporal thresholds - Temporal thresholds better match equal risk - Spatial thresholds needed for...
Conference Paper
Full-text available
This article consists of a collection of slides from the author's conference presentation.
Article
Future Aircraft Surveillance Applications (ASA) systems for situational awareness applications (e.g., conflict detection and resolution, final approach and runway occupancy awareness, and airport surface situational awareness methods), airborne spacing applications, airborne separation applications, and self-separation applications will benefit fro...
Conference Paper
Full-text available
An alternative Automatic Dependent Surveillance-Broadcast (ADS-B) implementation that transmits measurements from the Global Navigation Satellite System (GNSS) instead of processed aircraft state vector and performance parameters was previously proposed to improve surveillance performance. Both simulation results and flight test results have shown...
Conference Paper
Recent years have seen a rise in sophisticated navigational positioning techniques. Starting from classical GPS, differential GPS, ground based augmentation, and raw data submission have opened possibilities for high precision lateral positioning for beyond what was thinkable before. This yields new perspectives for technologies like ACAS/TCAS, by...
Conference Paper
Full-text available
Future Aircraft Surveillance Applications (ASA) systems such as conflict detection and resolution, final approach and runway occupancy awareness, and airport surface situational awareness methods will benefit from the introduction of Automatic Dependent Surveillance-Broadcast (ADS-B). An alternative measurement-based ADS-B system, which transmits m...
Conference Paper
Full-text available
Presents a collection of slides covering the following topics: data link; air-to-air collision avoidance; aeronautical communication; Minerva data acquisition board; A2A project; flight tests; and data rates.
Conference Paper
One of the key technologies in future air traffic management is air-to-air communication. Especially data links, that is, direct wireless transmission of digital data will play a major role for air traffic applications like ad-hoc integration into air spaces, separation assurance, collision avoidance and landing. Recently, the avionics engineering...
Conference Paper
One of the key technologies in future air traffic management is air-to-air communication. Especially data links, that is, direct wireless transmission of digital data will play a major role for air traffic applications like ad-hoc integration in air spaces, separation, collision avoidance and landing. Recently, the avionics engineering center of th...
Conference Paper
Full-text available
Future Aircraft Surveillance Applications (ASA) systems such as conflict detection and resolution, final approach and runway occupancy awareness, and airport surface situational awareness methods will benefit from the introduction of Automatic Dependent Surveillance-Broadcast (ADS-B). An alternative measurement-based ADS-B implementation, which tra...
Article
Full-text available
Synchronization tracking loops are key components of the GNSS receiver architecture. Their function is to estimate the evolution of the satellite signals’ code and carrier phases at the receiver’s antenna, yielding the observations required for computing the users’ position, velocity, and time. Hence, the tracking loop performance is intimately rel...
Conference Paper
Full-text available
To enable advanced Aircraft Surveillance Applications (ASA) system; To improve situational awareness and collision avoidance capabilities for separation assurance; To meet the expanding demand of air traffic in the NextGencomplexity; To increase safety, capacity, and efficiency of the NAS; To achieve above without scientific breakthroughs, exotic m...
Conference Paper
Full-text available
Future Aircraft Surveillance Applications System (ASAS) such as conflict detection, final approach and runway occupancy, and airport surface situational awareness methods will benefit from the introduction of Automatic Dependent Surveillance-Broadcast (ADS-B). An alternative ADS-B implementation, which transmits raw measurements from the Global Nav...
Conference Paper
Full-text available
In order to pursue solutions that simultaneously increase the flight crew's ability to avoid, detect, and recover from unexpected events while also providing countermeasures to pilot error, an onboard Hazard and Integrity Monitor (HIM) function as well as an Integrated Alerting and Notification (IAN) function have previously been proposed to detect...
Conference Paper
The work presented in this presentation is supported and funded through NASA under contract NNL11AA08C. The views and ideas in this presentation do not necessarily reflect those of the National Aeronautics and Space Administration(NASA).
Article
In a GPS/IMU integrated navigation system, problems are often encountered during periods of low-observability of heading considered essential in many applications such as antenna steering platforms, airborne navigation, swarm navigation, mobile mapping and harbor navigation. This paper proposes the use of a GPS/MEMS-based-IMU with a single GPS base...
Conference Paper
This paper discusses a hardware and software architecture that is capable of using all or a subset of its sensor inputs to determine a platform‟s position, velocity and attitude (PVA). The target application is PVA determination of unmanned aerial vehicles (UAV) and autonomous ground vehicles (AGV) in urban or indoor environments, where GNSS is onl...
Article
Future Aircraft Surveillance Applications (ASA) systems such as conflict detection, final approach and runway occupancy, and airport surface situational awareness methods will benefit from the introduction of Automatic Dependent Surveillance-Broadcast (ADS-B). An alternative ADS-B implementation, which transmits raw measurements from the Global Nav...