A5091451601- Aerospace and Aviation Technology
- Control Systems and Identification
- Real-time simulation and control systems
- Structural Health Monitoring Techniques
- Air Traffic Management and Optimization
- Target Tracking and Data Fusion in Sensor Networks
- Hydraulic and Pneumatic Systems
- Adaptive Control of Nonlinear Systems
- Robotic Path Planning Algorithms
- Vehicle Noise and Vibration Control
- Computational Fluid Dynamics and Aerodynamics
- Bladed Disk Vibration Dynamics
- Aerospace Engineering and Control Systems
- Human-Automation Interaction and Safety
- Speech and dialogue systems
- Acoustic Wave Phenomena Research
- Advanced Vision and Imaging
- Magnetic Bearings and Levitation Dynamics
- Aerodynamics and Acoustics in Jet Flows
- Inertial Sensor and Navigation
- Space Exploration and Technology
- Tribology and Lubrication Engineering
- Aerospace Engineering and Energy Systems
- Vehicle Dynamics and Control Systems
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2015-2024
Aircraft system identification has a five-decades-long tradition at German Aerospace Center (DLR). Over the last two decades, research covered various topics related to of fixed- and rotary-wing aircraft, nonconventional applications atmospheric effects, development new flight-test procedures for purposes, specific aircraft model enhancements corresponding parameter estimation. Comprehensive tools were developed that support this can be applied variety different problems types vehicles. The...
Over the last decades system identification has become a standard method for developing rotorcraft models from flight test data. Using data Bell 412 Advanced Systems Research Aircraft (ASRA) helicopter operated by National Council of Canada, different methods and tools are applied to common database. The identified 6-DoF rigid-body at one condition compared in detail regarding eigenvalues match both time frequency domain. development global model point that were conditions is described....
In contrast to the fixed frame, measuring rotor states in rotating frame of a helicopter is complex and costly therefore usually unaffordable for small production rotorcraft. this paper, data-driven approach linear observer tuning proposed illustrated predicting mast bending moments using fixed-frame rigid-body measurements only. The method demonstrated on research helicopter, where flight test data used identify three possible design models, optimize their respective performances, select...
New research activities on DLR’s EC135 ACT/FHS helicopter, has led to new challenges for the automatic flight control software of this testbed. Noise abatement flights, innovative approach trajectories and other topics all require helicopter follow a set waypoints as precisely possible. This paper presents algorithm which is capable generating curvature-continuous trajectories. A modification natural cubic spline presented, allows incrementally fit splines with defined boundary conditions...
Frequency-response function calculation is an essential element in rotorcraft data analysis, especially for system identification, model validation and analysis. This article analyzes the performance of a recently developed method frequency-response functions, called local polynomial (LPM), when applying it to systems. The presented as alternative methods that are based on segmenting windowing particularly effective reducing leakage error. both first compared simulated from linear helicopter...
Within the FaUSt (Fast Unmanned Scout) project, an existing UAV with intermeshing rotors was enhanced by two electric pusher propellers to extend speed range for future manned-unmanned teaming research. The modeling of such a compound has not yet been covered in literature. To extract models simulation and flight control design, dedicated tests were performed using multi-axis binary noise signal system identification activated base system. Two different methods are applied estimate...
This paper presents the analysis of fidelity obtained when performing in-flight simulations Bo-105 helicopter in forward flight with Active Control Technology/ Flying Helicopter Simulator (ACT/FHS). The results are preliminary sense that they based on real-time and fully non-linear simulation model ACT/FHS DLR’s simulator not itself. Yet, a test proven controller setting is used simulations. ACT/FHS, model-based controller, command briefly presented. precision MBC for each control/response...
Current frequency-domain system identification methods require an open-loop experiment design to identify the bare airframe dynamics of rotorcraft. Trained test pilots are needed fly these flight tests on unstable air vehicle and thus rotorcraft is very challenging. In this paper, a novel closed-loop approach presented. This does not pilot controls but applies Generalized Binary Noise as automatic signals all helicopter simultaneously. The ACT/FHS simulator identified by optimized...
Within the project "US-German Advanced Technologies for Rotorcraft Project Agreement (PA-ATR)" a human-machine interaction concept with purpose of increasing mode and situational awareness simplifying authority transfer highly automated helicopters has been developed. It combines multimodal cueing system tactile, auditive, visual components an automatic trajectory following capability. The development involved iterative optimization evaluation pilots using simulator ACT/FHS research...