&lt;title&gt;Miniature vibration isolation system for space applications&lt;/title&gt;

Quenon, Dan; Boyd, Jim; Buchele, Paul; Self, Rick; Davis, Torey; Hintz, Timothy L.; Jacobs, Jack H.

doi:10.1117/12.429654

Cited by 11 publications

(4 citation statements)

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“…Active control systems are effective in controlling the vibrations of structural elements such as rods, columns, beams, plates, and shells. Active struts with vibration suppression capabilities have been studied by Boyd et al (2001), Quenon et al (2001), Fujita et al (1998), Song et al (1999), Dekens and Neat (1999), O'Brien et al (1998), Hyde and Davis (1998), Masters and Crawley (1997), Huang et al (1997), Darby and Pellegrino (1997), and Wada et al (1990). Active struts have primarily been used for vibration suppression to maintain precision positioning rather than a direct precision positioning function.…”

Section: Introductionmentioning

confidence: 99%

Performance of an Active Composite Strut for an Intelligent Composite Modified Stewart Platform for Thrust Vector Control

Doherty

Ghasemi‐Nejhad

2005

Journal of Intelligent Material Systems and Structures

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Adaptive or intelligent structures which have the capability for sensing and responding to their environment promise a novel approach to satisfying the stringent performance requirements of future space missions. This research effort focuses on the development and performance evaluation of an active composite strut (ACS) with precision positioning and active vibration suppression capabilities for use in space structures. Such ACS has potentials to be used as active strut members in Stewart platforms, modified Stewart platforms (MSPs), space truss structures, etc. The developed ACS utilizes piezoelectric actuators/sensors providing precision positioning and vibration suppression capabilities that would enhance mission performance of space structures by fine position-tuning, and potentially eliminating the nonoperational period of a satellite while minimizing the fuel consumption utilized for its position correction in a thrust vector control (TVC) application. Precision positioning of the ACS is achieved by extending or contracting its internal piezoelectric actuator. To magnify the positioning capabilities of a stack piezoelectric actuator, a miniature inchworm mechanism is designed and incorporated within the ACS. A precision positioning experimental setup is developed and employed to demonstrate the precision positioning capabilities of the developed ACS. The axial vibration suppression capability of the ACS can also be provided by its internal piezoelectric stack actuator, and is demonstrated employing a developed vibration suppression experimental setup. Analytical and finite element analysis numerical verification, simulation, and modeling of the vibration suppression capabilities of the ACS are presented. Active vibration suppression schemes, using finite element analyses, are employed to numerically demonstrate the vibration suppression capabilities of the developed ACS. The ACS housing is a composite tubing. The numerical and experimental results show that the proposed ACS offers a promising method for achieving fine tuning of positioning tolerances as well as minimizing the effects of disturbances generated during a thruster firing of a satellite for the TVC application using a MSP.

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Section: Introductionmentioning

confidence: 99%

Performance of an Active Composite Strut for an Intelligent Composite Modified Stewart Platform for Thrust Vector Control

Doherty

Ghasemi‐Nejhad

2005

Journal of Intelligent Material Systems and Structures

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“…But those platforms commonly behave poor output performances no matter in response amplitude or output stability below 1 Hz driving frequency because of its own actuation mechanism. On the other hand, the Jet Propulsion Laboratory (Spanos et al, 1995), Honeywell (Quenon et al, 2001), CSA Engineering Inc. (Anderson et al, 2000) all propose their own satellite ultraquiet isolation technology experiment system for isolating those disturbances mainly ranging from 5 Hz to 250 Hz. In addition, passive vibration isolation is considered as the mainstream on orbit in view of the advantage of no energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on a new sensitive payload platform with simultaneous positioning and vibration suppression capabilities

Sun

Bai

et al. 2021

Journal of Vibration and Control

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Precision positioning and vibration isolation are two main challenges for the sensitive payloads, to realize high quality observation. It means that on the one hand the sensitive payload should keep pace with the changes of target location for achieving alignment; on the other hand, the micro-vibrations from space cabin equipment should be suppressed for avoiding image jitter. A six-degree-of-freedom platform with simultaneous positioning and vibration suppression capabilities is proposed for replacing the original scheme with series connection of a positioning platform and a vibration isolation platform. The theoretical model of the platform with rigid payload is established and then is utilized as a constraint to conduct the passive vibration suppression optimization. Subsequently, a finite element model is constructed to verify the optimization results. Finally, experimental setups are built and tests are carried out to validate the performances. The test results demonstrate that the proposed platform possesses good simultaneous positioning and vibration suppression capabilities.

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“…For example, Hexapod Stewart platforms with six degrees of freedom for device-plates [1][2][3][4][5][6][7] have been developed in the past for precision positioning or vibration suppression as optical benches, although some of them may not possess considerable motion ranges or frequency bands. It is desirable for the active structures to possess simultaneous precision positioning and vibration suppression (SPPVS) capabilities, since these capabilities help avoid any inaccuracy and malfunctioning of devices due to the external disturbances (i.e., vibration sources), and also contribute to the overall vibration suppression of the entire structure.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous thrust vector control and vibration isolation of satellites using steerable smart platforms

Ghasemi‐Nejhad

2010

Active and Passive Smart Structures and Integrated Systems 2010

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This paper presents an innovative concept, control strategies and experimental verification of simultaneous thrust vector control and vibration isolation of satellites. First, the innovative concept is introduced by employing a smart platform as an active structural interface between the main thruster of a satellite and the satellite structure. Second, the inverse kinematics and singularity analysis of the smart platform are performed. Third, thrust vector control model of satellites with smart platforms is deduced. Fourth, a multiple loop control strategy is proposed. It includes three cascaded feedback loops for nonlinear compensation of actuators, smart platform control and trust vector control, respectively, and a combined feedback-feedforward control scheme for vibration isolation. Finally, experiments are carried out and experimental results are illustrated and discussed. The cascaded multiple feedback loops compensate the hysteresis (for piezoelectric stacks inside the three linear actuators that individually have simultaneous precision positioning and vibration suppression), dead-zone, back-lash, and friction nonlinearities very well, and provide precision and quick smart platform control and satisfactory thrust vector control capability. The experimental results demonstrate that the simultaneous thrust vector control and vibration suppression is achieved with satisfactory performance.

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<title>Miniature vibration isolation system for space applications</title>

Cited by 11 publications

References 0 publications

Performance of an Active Composite Strut for an Intelligent Composite Modified Stewart Platform for Thrust Vector Control

Performance of an Active Composite Strut for an Intelligent Composite Modified Stewart Platform for Thrust Vector Control

Experimental investigation on a new sensitive payload platform with simultaneous positioning and vibration suppression capabilities

Simultaneous thrust vector control and vibration isolation of satellites using steerable smart platforms

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