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Microsatellite simulation for constellation research

Microsatellite simulation for constellation research

引用

aiaa modeling and simulation technologies conference, 2017

作者： Leidig, Kai Eickhoff, Jens Institute of Space Systems University of Stuttgart Stuttgart70569 Germany Airbus Defence and Space GmbH Friedrichshafen88039 Germany

ISBN: (数字)9781624104510

ISBN: (纸本)9781624104510

Over the past years, a variety of industrial and scientific standards have been introduced by spacecraft manufacturers to the effect of reducing costs and production cycles. Hence, spacecraft industry is heading for projects of increased complexity such as constellation and formation satellites demanding powerful simulation infrastructures. This paper addresses the challenges and the approach of developing such an infrastructure within a university framework, as well as the proceedings of setting-up an all-new microsatellite simulator tailored to that purpose. Focusing on the set-up of a software verification facility, the approach follows the hybrid concept of a controller-in-the-loop simulation running in parallel with a cluster of fully simulated (virtual) satellites. The infrastructure introduced in this paper therefor takes advantage of existing know-how gained at Institute of Space Systems regarding several aspects of system modeling and simulation as well as satellite bus design and telecommand. © 2017, American Institute of Aeronautics and Astronautics Inc, aiaa. All rights reserved.

关键词： DNA sequences

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Dynamic modeling and hardware-in-loop simulation for a tail-sitter unmanned aerial vehicle in hovering flight

Dynamic modeling and hardware-in-loop simulation for a tail-...

引用

aiaa modeling and simulation technologies conference, 2017

作者： Sun, Jingxuan Li, Boyang Shen, Lu Chen, Chih-Keng Wen, Chi-Yung Department of Mechanical Engineering The Hong Kong Polytechnic University Hong Kong National Taipei University of Technology Taipei Taiwan

ISBN: (数字)9781624104510

ISBN: (纸本)9781624104510

This paper presents a hardware-in-loop (HIL) simulation method for a tail-sitter vertical take-off and landing (VTOL) unmanned aerial vehicle (UAV). A six-degree-of-freedom (DOF) dynamic model for the tail-sitter vehicle is obtained with an aerodynamic database. An HIL simulation environment is developed that is capable of real-time dynamic simulation and supports a robot operating system (ROS)-based open-source autopilot. An independent ROS package is developed for data communication between a simulator and flight control computer. The hardware-in-loop setup is an indispensable tool for both hardware and software design of the control system for tail-sitter vehicles. © 2017, American Institute of Aeronautics and Astronautics Inc, aiaa. All rights reserved.

关键词： Antennas

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modeling and flight control simulation of a quad rotor tail-sitter VTOL UAV

Modeling and flight control simulation of a quad rotor tail-...

引用

aiaa modeling and simulation technologies conference, 2017

作者： Zhang, Fu Lyu, Ximin Wang, Ya Gu, Haowei Li, Zexiang Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Clear Water Bay Hong Kong

ISBN: (数字)9781624104510

ISBN: (纸本)9781624104510

This paper presents the modeling and simulation of a quad rotor tail-sitter VTOL UAV. The VTOL UAV is configured with four rotors for full attitude control and thrust generation for both vertical and forward fight. In the modeling process, a full attitude wind tunnel test was performed on the full scale UAV to capture the UAV aerodynamics. In our model, we explicitly consider the degradation of motor thrust and torque at the presence of forward speed, which is usually neglected in most multi-rotor models. Quaternion based attitude representation is utilized to drive the dynamics of the aircraft. When monitoring and commanding the UAV attitude, ZXY Euler angles are used to avoid the singularity at pitching angle of 90 degrees of commonly used ZYX Euler angles. Other minor considerations include motor dynamics, gyroscopic effect, etc. Such a model captures the UAV kinematics, dynamics, aerodynamics and actuator dynamics, and serves a good reference model for flight controller design and verification. As a testimony of the presented model, an attitude controller with an altitude holding loop will be presented. © 2017, American Institute of Aeronautics and Astronautics Inc, aiaa. All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

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An iteration on the horizon simulation framework to include .NET and Python scripting

An iteration on the horizon simulation framework to include ...

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aiaa modeling and simulation technologies conference, 2017

作者： Yost, Morgan Mehiel, Eric A. Lockheed Martin Space Systems Company LittletonCO80127 United States California Polytechnic State University San Luis ObispoCA93410 United States

ISBN: (纸本)9781624104510

modeling and simulation is a crucial element of the aerospace engineering design process because it allows designers to thoroughly test their solution before investing in the resources to create it. The Horizon simulation Framework (HSF) v3.0 is an aerospace modeling and simulation tool that allows the user to verify system level requirements in the early phases of the design process. A low fidelity model of the system that is created by the user is exhaustively tested within the built-in Day-in-the-Life simulator to provide useful information in the form of failed requirements, system bottle necks and leverage points, and potential schedules of operations. The model can be stood up quickly with Extended Markup Language (XML) input files or can be customly created with Python Scripts that interact with the framework at runtime. The goal of the work presented in this paper is to progress HSF from v2.3 to v3.0 in order to take advantage of current software development technologies and modern software architecting strategies. By updating the codebase from C++ and Lua to C#and Python, previously unreachable constructs became available and a new architecture was achieved. The details of the decisions, implementation and benefits of the new framework are discussed within the paper and may be useful to the reader who is designing or re-architecting a simulation framework. The new framework was also compared to the old framework for performance and accuracy and was found to perform similarly if not better in some cases. © 2017, American Institute of Aeronautics and Astronautics Inc, aiaa. All rights reserved.

关键词： Python

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Scenario development at the vertical motion simulator

Scenario development at the vertical motion simulator

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aiaa modeling and simulation technologies conference, 2017

作者： Reardon, Scott E. Beard, Steven D. Lewis, Emily Aerospace Simulation Research and Development Branch NASA Ames Research Center Moffett Field MS 243-1 CA94035 United States SAIC NASA Ames Research Center SimLabs Moffett Field Mail Stop 243-6 CA94035 United States

ISBN: (纸本)9781624104510

There has been a significant effort within the simulation community to standardize many aspects of flight simulation. More recently, an effort has begun to develop a formal scenario definition language for aviation. A working group within the aiaa modeling and simulation Technical Committee has been created to develop a standard aviation scenario definition language, though much of the initial effort has been tailored to training simulators. Research and development (R&D) simulators, like the Vertical Motion Simulator (VMS), and training simulators have different missions and thus have different scenario requirements. The purpose of this paper is to highlight some of the unique tasks and scenario elements used at the VMS so they may be captured by scenario standardization efforts. The VMS most often performs handling qualities studies and transfer of training studies. Three representative handling qualities simulation studies and two transfer of training simulation studies are described in this paper. Unique scenario elements discussed in this paper include special out-the-window (OTW) targets and environmental conditions, motion system parameters, active inceptor parameters, and configurable vehicle math model parameters. © 2017, American Institute of Aeronautics and Astronautics Inc, aiaa. All rights reserved.

关键词： Flight simulators

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Dynamic modeling and simulation of a quadcopter with motor dynamics

Dynamic modeling and simulation of a quadcopter with motor d...

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aiaa modeling and simulation technologies conference, 2017

作者： Kim, A. Ram Vivekanandan, Prasanth McNamee, Patrick Sheppard, Ian Blevins, Aaron Sizemore, Alex Department of Aerospace Engineering School of Engineering The University of Kansas LawrenceKS66045 United States Department of Electrical Engineering and Computer Science School of Engineering The University of Kansas LawrenceKS66045 United States

ISBN: (数字)9781624104510

ISBN: (纸本)9781624104510

Increased usage of quadcopters as an embedded system has raised the necessity of developing high quality dynamic models for designing controllers and simulations. In this work, a dynamic model was developed for a quadcopter platform by conducting experiments for estimating the moments of inertia and for determining motor dynamics. The dynamic model consisted of equations of motions derived from Newton and Euler's approach. Moments of inertia were estimated by operating a bifilar pendulum test. The motor dynamics were developed using a custom built test bed. The thrust, torque, voltage, and current were recorded in order to develop an adaptive dynamic model with respect to battery volt-age. Following the completion of the dynamic model, the state space model was developed in linear time invariant condition so that it could be utilized for designing a controller for simulation purposes. The system was flight tested and parameter estimation was performed on the thrust and torque motor coefficients. © 2017, American Institute of Aeronautics and Astronautics Inc, aiaa. All rights reserved.

关键词： Dynamic models

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Evaluation of a Tactical Surface Metering Tool for Charlotte Douglas International Airport via Human-in-the-Loop simulation 36

Evaluation of a Tactical Surface Metering Tool for Charlotte...

引用

36th IEEE/aiaa Digital Avionics Systems conference (DASC)

作者： Verma, Savita Lee, Hanbong Martin, Lynne Stevens, Lindsay Jung, Yoon Dulchinos, Victoria Chevalley, Eric Jobe, Kim Parke, Bonny NASA Ames Res Ctr Moffett Field CA 94035 USA San Jose State Univ NASA Ames Res Ctr Moffett Field CA USA

ISBN: (纸本)9781538603659

NASA has been working with the FAA and aviation industry partners to develop and demonstrate new concepts and technologies that integrate arrival, departure, and surface traffic management capabilities. In March 2017, NASA conducted a human-in-the-loop (HITL) simulation for integrated surface and airspace operations, modeling Charlotte Douglas International Airport, to evaluate the operational procedures and information requirements for the tactical surface metering tool, and data exchange elements between the airline controlled ramp and ATC Tower. In this paper, we focus on the calibration of the tactical surface metering tool using various metrics measured from the HITL simulation results. Key performance metrics include gate hold times from pushback advisories, taxi-in/out times, runway throughput, and departure queue size. Subjective metrics presented in this paper include workload, situational awareness, and acceptability of the metering tool and its calibration

关键词： air traffic management integrated operations tactical surface metering human-in-the-loop simulation

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Design and benchmarking of a network-in-the-loop simulation for use in a hardware-in-the-loop system

Design and benchmarking of a network-in-the-loop simulation ...

引用

aiaa modeling and simulation technologies conference, 2017

作者： Aretskin-Hariton, Eliot D. Thomas, George L. Culley, Dennis E. Kratz, Jonathan L. NASA Glenn Research Center ClevelandOH44135 United States N&R Engineering Parma HtsOH44130 United States

ISBN: (数字)9781624104510

ISBN: (纸本)9781624104510

Distributed engine control (DEC) systems alter aircraft engine design constraints because of fundamental differences in the input and output communication between DEC and centralized control architectures. The change in the way communication is implemented may create new optimum engine-aircraft configurations. This paper continues the exploration of digital network communication by demonstrating a Network-In-the-Loop simulation at the NASA Glenn Research Center. This simulation incorporates a real-time network protocol, the Engine Area Distributed Interconnect Network Lite (EADIN Lite), with the Commercial Modular Aero-Propulsion System simulation 40k (C-MAPSS40k) software. The objective of this study is to assess digital control network impact to the control system. Performance is evaluated relative to a truth model for large transient maneuvers and a typical flight profile for commercial aircraft. Results show that a decrease in network bandwidth from 250 Kbps (sampling all sensors every time step) to 40 Kbps, resulted in very small differences in control system performance. © 2017, American Institute of Aeronautics and Astronautics Inc, aiaa. All rights reserved.

关键词： Engines

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Recent advances in wind lidar technologies for characterization of wake vortices 10th

Recent advances in wind lidar technologies for characterizat...

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10th aiaa Atmospheric and Space Environments conference, 2018

作者： Prasad, Narasimha S. NASA Langley Research Center Remote Sensing Branch 5 N. Dryden St. MS 468 HamptonVA23681 United States

ISBN: (数字)9781624105586

ISBN: (纸本)9781624105586

Fast-time wake vortex models have been studied in various details for possible operational and research applications related to air traffic management. The wake vortex LIght Detection and Ranging (lidar) technology plays a critical role in validating these numerical wake models. With the advent of lasers, various types of remote sensing techniques and systems began to develop in laboratories across the world. Fundamentally, all these techniques depend upon sensing of wind velocities at a given range coupled with effective algorithms for extraction of wake vortex characteristics. When solid-state lasers appeared on the scene, practical lidar systems were built for field operations. These lidars have enabled wake vortex data collection in airports under various environmental and air craft orientation conditions for analysis and validation of CFD generated fast-time wake vortex models. In this paper, a brief history of wake vortex measurements followed by prominent field campaigns conducted by NASA Langley Research Center will be discussed. In subsequent sections, salient aspects of recently developed novel wind lidar technology will be presented. © 2018, American Institute of Aeronautics and Astronautics Inc, aiaa. All rights reserved.

关键词： NASA

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aiaa modeling and simulation technologies conference, 2016

AIAA Modeling and Simulation Technologies Conference, 2016

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aiaa modeling and simulation technologies conference, 2016

ISBN: (纸本)9781624103872

The proceedings contain 81 papers. The special focus in this conference is on modeling and simulation technologies. The topics include: Probabilistic airport acceptance rate prediction;effects of aircraft mass and weather data errors on trajectory optimization and benefits estimation;creating severe weather model for arrival manager by analyzing the flight data of weather front passage;analyzing feasibility of continuous descent operation following fixed-flight path angle from oceanic route to tokyo international airport;modeling and simulation of spacecraft pointing modes using quaternion-based nonlinear control laws;compressor performance modeling and prognostics using artificial neural networks;development of a cockpit-pilot model for thermal comfort optimization during long-mission flight;aerodynamic modelling of the 5-MW wind turbine for development and application of real-time nonlinear receding horizon control;optimal attitude control of a 27U cubesat with a pyramid reaction wheel array and magnetic torque coils;extracting measurements from operational flight data using the are example;co-simulation of spatial automatic assembly system based on stewart platform;using airport fast-time simulation models to increase the quality of airport capacity utilization studies;global simulation of aviation operations;validation study on descent trajectory optimization and scheduling improvement using actual operation data;simulation approach to the resilience engineering assessment of the ATM system in crisis scenarios and next generation flight management system simulator and optimal attitude control of agile spacecraft using combined reaction wheel and control moment gyroscope arrays.

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