Robust on-off pulse control of flexible space vehicles

final report of the second-year project

Publisher: Research Institute for COmputing and Information Systems, University of Houston-Clear Lake, Publisher: National Aeronautics and Space Administration, Publisher: National Technical Information Service, distributor in [Houston, Tex.], [Washington, DC, Springfield, Va

Written in English
Published: Downloads: 294
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Subjects:

  • Attitude control.,
  • Flexible spacecraft.,
  • Jet control.,
  • Orbit transfer vehicles.,
  • Orbital maneuvering vehicles.,
  • Robustness (Mathematics),
  • Space stations.

Edition Notes

Other titlesRobust on off pulse control of flexible space vehicles.
StatementBong Wie, Revi Sinha.
SeriesNASA contractor report -- NASA CR-192174.
ContributionsSinha, Revi., United States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL15409300M

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The Nederman m extension arm is designed to be used when extra reach is needed. Manufactured from robust steel profiles. The product can be connected direct to a single fan or to a ducted system. The product is suspended by a pivoting wall bracket close to the wall and a joint on the middle of the product, which makes it flexible in all. The proportional outputs, on-off outputs and on-off inputs share positions, see below. In order to increase the performance of proportional outputs when controlling proportional valves, the dither frequency can be adjusted. High power On/Off outputs The MDL module has six (6) on/off outputs that are high-side power outputs. These outputs may.   In the era of physical distancing, sidewalk space is at a premium, so we should disincentivize car use by rapidly launching congestion pricing and returning road space to pedestrians, buses, and. Vehicle Overview Landing Page. The space shuttle system was made up of three main components: •The two Solid Rocket Boosters (SRBs), which provided 80 percent of launch thrust. •The huge rust-colored External Tank (ET), which fed fuel to three Space Shuttle Main Engines (SSMEs) during launch •The orbiter itself (which many people think of as "the shuttle"), which .

  Robust Adaptive Fault-Tolerant Control for Hypersonic Flight Vehicles with Multiple Faults proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 12 months or until all downloads are used. Fault Diagnosis and Active Fault Tolerant Control for Near Space Vehicle Based. In this report, achievements under TO, "Robust Lateral Control of Heavy Duty Vehicles," are presented. The purposes of this project are: to design new controllers or redesign existing controllers for lateral control of heavy vehicles to improve performance; to evaluate designed controllers by experiments and to study autonomous vehicle following control.   It’s an efficient way to address Drives Motor Control system on a flexible manner, on a power range from kW to 50MW, on a voltage range from V to kV, and more. On a technical point of view, each control part may be named accordingly to academics naming or state of the art: Power Control: Pulse width modulation, Space vector Control. impulse-response function. Section 2–3 introduces automatic control systems and Sec-tion 2–4 discusses concepts of modeling in state n 2–5 presents state-space representation of dynamic n 2–6 discusses transformation of mathemat-ical models with MATLAB. Finally, Section 2–7 discusses linearization of nonlinear.

Robust on-off pulse control of flexible space vehicles Download PDF EPUB FB2

Future space vehicles such as the orbital transfer vehicles, orbital maneuvering vehicles, and space station will extensively use reaction jets for orbital maneuvering and attitude stabilization.

The proposed robust fuel- and time-optimal control algorithm is used for a three-mass spring model of flexible spacecraft.

A fuel-efficient on-off control. Get this from a library. Robust on-off pulse control of flexible space vehicles: final report of the second-year project. [Bong Wie; Revi Sinha; United States. National Aeronautics and Space. The on-off reaction jet control system is often used for attitude and orbital maneuvering of various spacecraft.

Future space vehicles such as the orbital transfer vehicles, orbital maneuvering vehicles, and space station will extensively use reaction jets for orbital maneuvering and attitude stabilization.

The proposed robust fuel- and time-optimal control Author: Bong Wie, Ravi Sinha. Get this from a library. Robust control of flexible space vehicles with minimum structural excitation: final report of the first-year project: on-off pulse control of flexible space vehicles.

[Bong Wie; Qiang Liu; United States. National Aeronautics and Space Administration.]. Robust on-off pulse control of flexible space vehicles. By Bong Wie and Ravi Sinha. Abstract.

The on-off reaction jet control system is often used for attitude and orbital maneuvering of various spacecraft. Future space vehicles such as the orbital transfer vehicles, orbital maneuvering Robust on-off pulse control of flexible space vehicles book, and space station will extensively use reaction Author: Bong Wie and Ravi Sinha.

Robust control of flexible space vehicles with minimum structural excitation: On-off pulse control of flexible space vehicles. By Qiang Liu and Bong Wie. Abstract. Both feedback and feedforward control approaches for uncertain dynamical systems (in particular, with uncertainty in structural mode frequency) are investigated.

The control. Robust Minimum Time Control of Flexible Structures,” Automatica, Vol. 34 (2 Fuel-Efficient Pulse Command Profiles for Flexible Spacecraft,” J. of Guidance, Control, and Dyn., Vol. 19 (4 Design of Space Structure Control Systems Using On-Off Thrusters,”.

Robust optimization of satellite attitude control system with on-off thruster under uncertainty. Space Vehicle Dynamics and Control, Second Edition. On the interaction of flexible modes and on-off thrusters in space robotic systems. Recommended. The describing function method is employed for the nonlinear control analysis and design of a flexible spacecraft equipped with pulse modulated reaction jets.

The method provides a means of characterizing the pulse modulator in terms of its gain and phase for structural mode limit cycle analysis. Although the describing function method is inherently inexact and is not widely used. Robust Time-OptimaI Control for Flexible StructureVibration Control by Augmented Dynamics International Journal of Aeronautical and Space Sciences, Vol.

5, No. 1 Vibration control of a telescopic handler using time delay control and commandless input shaping technique. Dynamics and control of large space structures.

Guidance, 7(5), ­ Singh, S. Robust nonlinear attitude control of flexible spacecraft. IEEE Transactions on Aerospace and Electronic Systems, 23(3), ­ Somov, S. Damping dynamics of a flexible satellite at pulse-width modulation of an engine control.

First is to design the PWPF modulator translating the continuous desired force signal to an on-off signal for the spacecraft impulse thrusters. Pulse modulated control synthesis for a flexible. Switching functions and control alternatives that include duty ratio control, pulse-width modulation, and phase control are defined.

control becomes more flexible and complex, and higher degrees of redundancies are available. to obtain stability and robust control under conditions less restrictive than other methods.

A stability robustness condition is given based on which a switch-on/off algorithm is developed. above in real vehicles, a robust scheme to the issue on control of large flexible space. Modeling and Robust Control of Large Flexible Space Structures SCG Report -- PhD Thesis by Benoit BOULET, Abstract In this thesis, we consider the problem of robust control of large flexible space structures (LFSS).

Dynamic models of LFSS are characterized by their high order and their significant number of highly uncertain, lightly.

characteristics of a crash pulse. Some of these include the vehicle shape, vehicle structure, vehicle mass, collision partner, crash mode, and am ount of engagement. Given this variability, the modeling technique must be flexible enough to accommodate a wide range of characteristics but robust enough to give good correlation to the parameters.

Abstract: In this paper, a robust single-input fuzzy logic control Robust Single Input Fuzzy Logic Controller (RSIFLC) scheme is proposed and applied for task-space trajectory control of an autonomous underwater vehicle manipulator system (AUVMS) employed for underwater manipulation tasks.

The effectiveness of the proposed control scheme is. The powerful system can be added to or replace an electronic control unit (ECU), and lets you experience and test control functionalities in a real environment. MicroAutoBox III is ideal for many different rapid control prototyping (RCP) applications from autonomous driving to zero emissions either as a single demonstrator or for equipping.

During the early stage of reusable launch vehicle (RLV) reentry flight, reaction control system (RCS) is the major attitude control device. RCS, which is much different from the atmospheric steer’s control, requires a well designed control allocation system to fit the attitude control in high altitude.

In this paper, an indexed control method was proposed for RCS preallocation, a. Coordinated robust control based on extended state observer of dual-arm space robot with closed chain for transferring a target.

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, Vol. Issue. 13, p. A minimum energy control method for on-off decentralized control of mechanical systems is introduced. Energy consumption is minimized by turning on an actuator when the structure does work on it, and turning it off when the actuator would impart energy on the structure to improve overall system response.

The paper describes the development of a microsatellite attitude determination and control subsystem (ADCS) and verification of its functionality by software-in-the-loop (SIL) method. The role of ADCS is to provide attitude control functions, including the de-tumbling and stabilizing the satellite angular velocity, and as well as estimating the orbit and attitude information during the.

Measure Control Pilot pulse width to determine maximum power EVSE can deliver. Create an identical Control Pilot signal to command the vehicle to reduce maximum charging power.

The battery management system adjusts the charge rate in response to the Control Pilot signal. Using the Control Pilot signal Control Pilot connectivity. Analysis and Design of Launch Vehicle Flight Control Systems This paper describes the fundamental principles of launch vehicle flight control analysis and design.

In particular, the classical concept of "drift-minimum" and "load-minimum" control principles is re-examined and its performance and stability robustness with respect to modeling uncertainties. We show that by a suitable nonlinear feedback, the manifold in state space which describes the dynamics of the rigid manipulator, that is, the manipulator without joint elasticity, can be made invariant under solutions of the elastic joint system.

The implications of this result for the control of elastic joint robots are discussed. Your Source for Process Control Instrumentation 19 On-Off Control • What characterizes on -off control. – Simple control, no tuning – 2 states: either on or off – Sawtooth response over time – overshoot, undershoot – Hysteresis/deadband • Gap between when output turns on and when it turns back off again.

Robust Control Design for a Flexible Unmanned Aerial Vehicle This paper concerns with control of Unmanned Aerial Vehicles (UAVs), which are expected to carry out very critical maneuvers, well in excess of what pilots are able to tolerate.

Key–Words: buck-boost converter, state-space averaging procedure, robust stability, PID control, H∞ loop-shaping control, disturbance rejection 1 Introduction In the last two decades the classical approach to designing power converters has been transformed into the one based on the application of linear and nonlinear control techniques to.

() Active Control of a 6-DOF Space Robot with Flexible Panels Using Singular Perturbation Method. The Journal of the Astronautical Sciences() Model Order Reduction for Control of Engine Thermal. Abstract. NOTE ⁃ A New Edition of This Title is Available: Digital Control in Power Electronics, 2nd Edition This book presents the reader, whether an electrical engineering student in power electronics or a design engineer, some typical power converter control problems and their basic digital solutions, based on the most widespread digital control techniques.

FastMig X Regular for robust workshop use a MIG/MAG pulse welding, mainly for welding thick plates, FastMig X Pipe for pipe and root welding and FastMig X Intelligent for demanding welding applications, for all metals and processes, including welding of thin sheets.The control of flexible systems is a large and important field of study.

Unwanted transient deflection and residual vibration are detrimental to many systems ranging from nano-positioning devices to large industrial cranes. Thousands of researchers have worked diligently for decades to provide solutions to the challenging problems posed by flexible dynamic systems.of Complex Spacecraft such as Solar Sails, Large Flexible Structures, and Agile Imaging Satellites Equipped with Control Moment Gyros (CMGs).” Book: 1.

Space Vehicle Dynamics and Control, AIAA Education Series, (2nd Edition,pages) 2. Space Vehicle Guidance, Control, and Astrodynamics, AIAA Education Series, to be published in.