The nonlinear behavior of a passive zero-spring-rate suspension system

Woodard, Stanley E.; Housner, J. M.

doi:10.2514/6.1988-2316

Cited by 8 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Woodard used the combination of various springs and structures to form a suspension device, which was named "ZSRM" and had approximately zero stiffness. However, the disadvantage of this device is that the adjustable stroke is short and the motion range is limited [9]. Ashory proposed a SMURF method based on direct substructure technology.…”

Section: Introductionmentioning

confidence: 99%

Encapsulation Based Method for Natural Frequency Identification of Deployable Solar Arrays with Multiple Plates

Zhao

Chen

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

The ground modal test is an important approach to the natural frequency of solar arrays to support the attitude control of spacecraft. However, for the batch production of small satellites, the accuracy and efficiency of traditional ground modal testing methods are limited. This shortcoming restricts the development of satellite constellations. Based on the encapsulation method widely used in the computer field, this paper proposed a natural frequency identification method of deployable solar arrays with multiple plates. This method is of high accuracy and efficiency that meets the demand of attitude control and makes sense to accelerate the batch production of small satellites. First, a suspended modal test system with gravity compensation function is designed. Second, the mathematical model of the test system is established. Abstracting parts of the parameters of the test object into an encapsulated entity, the mathematical model is simplified by equivalent variables. Thus, the direct mapping relationship between the ground test result and the true natural frequency is proposed. Finally, to verify the identification accuracy, finite element analysis (FEA) and the ground modal test of a two-folder solar array simulant are carried out. The results show that the relative error of the first-order natural frequency after correction and the theoretical value is less than 3%. Meanwhile, the identification accuracy of the ground modal test is improved by more than 50%. This method improves the availability of ground test results and reduces the calculation amount, so that it is convenient for engineering applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Encapsulation Based Method for Natural Frequency Identification of Deployable Solar Arrays with Multiple Plates

Zhao

Chen

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…Other studies reported on the use of nonlinear springs with softening characteristics to achieve a quasi-zero stiffness effect for vibration isolation purposes [13][14][15]. The combination of mechanical springs and magnets has been exploited in [16].…”

Section: Introductionmentioning

confidence: 99%

On the Dynamic Behavior of a Nonlinear Oscillator With Softening Characteristics Attached to an Electro-Dynamic Actuator

Cutuli¹,

Aiello²,

Gatti³

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

View full text Add to dashboard Cite

show abstract

“…For many politically minded geographers, the less ‘instructive’ side of geophilosophy is even less useful, or rather trying too hard to be cool to be useful, with its apparent fetishisation of human extinction or certain types of matter, including fossils, obsidian, soil, rot, slime and other objects of gothic appeal (e.g. Negarestani, 2010; Woodard, 2012). This preference for ‘dark matter’ has prompted the question whether ‘geophilosophy’ is merely an aesthetic project or a genuine challenge to dematerialised thought or to the ‘cutesy reflexive things’ of STS (Wyatt, 2014).…”

Section: Introductionmentioning

confidence: 99%

Re-reading worldliness: Hannah Arendt and the question of matter

Last

2016

Environ Plan D

View full text Add to dashboard Cite

Both new and historical materialisms have attracted a reputation for leading to ‘bad politics’. Historical materialisms have been accused of reducing too much to material relations and their production, whereas new materialisms have been accused of avoiding politics completely. This article reads the critique directed at materialisms against Hannah Arendt’s exceptional distrust of matter. Focusing on her concept of ‘worldliness’, it grapples with the question ‘why do we need an attention to matter in the first place?’ The attempted re-reading takes place through a feminist and postcolonial lens that draws out the contributions and failures of Arendt’s (anti)materialist framework in its banishing of matter from politics. Arendt’s focus on the prevention of dehumanisation further serves as a means to discuss materialism’s risk in negotiating the tension between deindividuation and dehumanisation.

show abstract

The nonlinear behavior of a passive zero-spring-rate suspension system

Cited by 8 publications

References 0 publications

Encapsulation Based Method for Natural Frequency Identification of Deployable Solar Arrays with Multiple Plates

Encapsulation Based Method for Natural Frequency Identification of Deployable Solar Arrays with Multiple Plates

On the Dynamic Behavior of a Nonlinear Oscillator With Softening Characteristics Attached to an Electro-Dynamic Actuator

Re-reading worldliness: Hannah Arendt and the question of matter

Contact Info

Product

Resources

About