Last edited by Taukinos
Tuesday, October 6, 2020 | History

3 edition of Active and Adaptive Control for Payload Launch Vibration Isolation found in the catalog.

Active and Adaptive Control for Payload Launch Vibration Isolation

Active and Adaptive Control for Payload Launch Vibration Isolation

  • 73 Want to read
  • 7 Currently reading

Published by Storming Media .
Written in English

    Subjects:
  • SCI041000

  • The Physical Object
    FormatSpiral-bound
    ID Numbers
    Open LibraryOL11848018M
    ISBN 10142353638X
    ISBN 109781423536383

    Patent pending ShockWave isolator product family is the perfect solution for small payload and cubesat launch isolation. ShockWave leverages over two decades of spaceflight hardware heritage and packages launch worthy technology into a reliable, predictable system at a price point that is comparable to non-aerospace, elastomeric isolation mounts.   Parallel Active Vibration Isolation Capable of detecting payload vibrations, which initiates the corrective force to be applied to minimize the sensor output Typically used for stage motion cancellation as compared to floor vibration isolation applications.

    The active payload adaptor is thought to replace the conventional passive payload adaptors, for instance, the conical Carbon Fiber Reinforced Plastics (CFRP) shell structures. the future research will focus on the investigation of active vibration isolation performance. Three-degree-of-freedom adaptive-passive isolator for launch. An augmented adaptive sliding-mode controller is proposed in this paper for a diaphragm-type pneumatic vibration isolation (PVI) system containing nonlinear characteristics and time-varying uncertainties with unknown bounds. To capture and deal with the time-varying uncertainties, a controller design based primarily on the functional approximation (FA) technique complemented with an adaptive.

    While the on-orbit vibration isolation systems were active-passive systems, which lately used smart structures and new control algorithms including adaptive neural network-based, launch isolation systems evolved from passive to active-passive systems . As its title implies, the book does not address active vibration isolation. The first of the book's four chapters deals with the basics of isolation of rigid bodies, including consideration of all six degrees of freedom. It presents the relevant equations, but dwells more extensively on simpler situations and practical real-life applications.


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Active and Adaptive Control for Payload Launch Vibration Isolation Download PDF EPUB FB2

Active and Adaptive Control for Payload Launch Vibration Isolation [Julian R. Jarosh] on *FREE* shipping on qualifying offers. Active and Adaptive Control for Payload Launch Vibration IsolationAuthor: Julian R.

Jarosh. Adaptive control for payload launch vibration isolation Adaptive control for payload launch vibration isolation Jarosh, Julian R. ABSTRACT The Department of Defense has identified launch vibration isolation as a major research interest. Reducing the loads a satellite experiences during launch will greatly enhance the reliability and lifetime and decrease the payload.

Reducing the loads a satellite experiences during launch will greatly enhance the reliability and lifetime and decrease the payload structural mass. DoD space programs stand to benefit significantly from advances in vibration isolation technology. This study explores potential hybrid vibration isolation using adaptive control with a passive Cited by: 5.

At the Spacecraft Research and Design Center (SRDC) of Naval Postgraduate School, active vibration isolation by using smart struts is an active are a of research. For the problems of precision payload pointing, tracking and vibration isolation, a hexapod platform with advanced active control is a promising device.

The Department of Defense has identified launch vibration isolation as a major research interest. Reducing the loads a satellite experiences during launch will greatly enhance the reliability and lifetime and decrease the payload structural mass. DoD space programs stand to benefit significantly from advances in vibration isolation technology.

This study explores potential hybrid vibration Cited by: 5. In book: Vibration Analysis and Control in Mechanical Structures and Wind Energy Conversion Systems, Chapter: Passive, Adaptive, Active Vibration Control, and Integrated Approaches, Publisher.

Active Vibration Isolation System for Launch Load Alleviation Michael E. Everta, Paul C. Janzena, actuation and isolation architectures and control strategies.

Integration of two flight experiments is summarized. An adaptive-passive or semi-active isolation system could achieve some of the benefits of a fully active system while. stability enhancement by vibration isolation, vibration damping and disturbance rejection, and (ii) precision pointing and positioning.

The details of the control strategy depends on specific features of the machine involved (Table 1). This paper is organized as follows.

Section 2 reviews the basic concept used for active vibration isolation. Active Vibration Isolation for Stewart Platforms Using Adaptive Backstepping Sliding Mode Control Vibration isolation and dual-stage actuation pointing system for space precision payloads Acta Astronautica, Vol.

Vibration isolation controllers are used to suppress undesirable disturbance in order to guarantee better performance in many industrial and scientific domains. To overcome the drawbacks of the conventional passive systems, a novel design based on the action dependent heuristic dynamic programming (ADHDP) is addressed in this paper for the semi-active vibration isolator.

Passive vibration control solutions like tuned vibration absorbers are often limited to tackle a single structural resonance or a specific disturbance frequency. Active vibration control systems can overcome these limitations, yet requiring continuously electrical energy for a sufficient performance.

Thus, in some cases, a passive vibration control system is still preferable. The feedback of integrated forces and the FxLMS based adaptive cancellation are combined in the active isolation to attenuate random and periodical responses of the payload induced by vibration in the base.

Simulation and experiments are carried out to verify the effectiveness of active isolation of micro-vibrations with the Stewart platform.

Active vibration isolation by adaptive proportional control is theoretically and experimentally investigated. Absolute velocity feedback control is implemented experimentally for active vibration control incorporating a passive vibration isolator to suppress the resonant oscillation of natural frequencies.

With the development of space technology, the adverse effects to the spacecraft payload caused by the inevitable vibration from electromechanical system become increasingly prominent.

To effectively reduce low frequency vibration, this paper presents a design scheme which takes voice coil motor servo system as active actuator of vibration isolation platform, and for the actual vibration.

Introduction into active vibration isolation. Abstract: Adaptive control has drawn attention for active vibration isolation and vehicle suspensions because of its potential to perform in the presence of nonlinearities and unknown or time-varying parameters.

Model-reference adaptive control has been used to force the plant to track the states or certain outputs of the ideal reference model. Proceedings of SPIE. ; Bicos A S, Johnson C D, Davis L P.

Need for and benefits of launch vibration isolation. Proceedings of SPIE. ; Jarosh J R, Agnes G S, Karahalis G G. Adaptive control for payload launch vibration isolation.

Proceedings of SPIE. ; The pneumatic vibration isolation (PVI) system adopted in this paper consists of a single pneumatic chamber, a rubber diaphragm and a piston that supports the payload as shown in Figure 1. The payload mass is 42 kg. The PVI is used as an actuator in the active-isolation cases.

Semi-active isolation is known to offer appreciable improvement over passive isolation for tonal vibration. As regards broadband vibration, semi-active control leads to a conflict between the demand for damping, which induces less good isolation performance than for tonal vibration.

However, they have limitations the major drawback is their sensitivity to payload induced vibrations and dynamic forces. IDE Active Isolation Technology Active isolation provides "real time" 6 degrees of freedom control utilizing pneumatic air spring, coil spring or elastomeric springs as the basis for this unique hybrid approach.

This work investigates the use of multi-degree of freedom (MDOF) passive and active vibration absorbers for the control of structural vibration as an improvement to conventional single degree of freedom (SDOF) vibration absorbers.

An analytical model is first used to compare passive two degree of freedom (2DOF) absorbers to SDOF absorbers using point impedance as the performance criterion. Adaptive control has drawn attention for active vibration isolation and vehicle suspensions because of its potential to perform in the presence of .The payload cost includes a substantial component for provision to withstand the severe launch vibration environment.

In this paper, a novel three degree-of-freedom isolation system built in the footprint and within the existing PAFs is presented. The vibration isolator consists of a mechanical constraining mechanism that prevents the rotation.