Control of a hybrid active-passive vibration isolation system

Lee, Jin Ho; Kim, Hyo Young; Kim, Ki‐Hyun; Kim, Myeong Hyeon; Lee, Seok Woo

doi:10.1007/s12206-017-1112-2

Cited by 20 publications

(6 citation statements)

References 20 publications

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“…However, active isolation primarily focuses on low-frequency suppression. In contrast, active–passive hybrid isolation technology [ 15 , 16 , 17 ] combines the strengths of both active and passive isolation methods, addressing the drawbacks of each and achieving optimal isolation performance. In an active–passive hybrid isolation system, passive isolation primarily handles high-frequency isolation, while active isolation is primarily responsible for low-frequency isolation.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Study of a Hybrid Micro-Vibration Isolation System Based on a Strain Sensor for High-Precision Space Payloads

Guo,

Zhou,

et al. 2024

Sensors

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Micro-vibrations significantly influence the imaging quality and pointing accuracy of high-precision space-borne payloads. To mitigate this issue, vibration isolation technology must be employed to reduce the transmission of micro-vibrations to payloads. In this paper, a novel active–passive hybrid isolation (APHI) system based on a strain sensor is proposed for high-precision space payloads, and corresponding theoretical and experimental studies are implemented. First, a theoretical analysis model of the APHI system is established using a two-degrees-of-freedom system, and an integral control method based on strain sensing is presented. Then, an electromagnetic damper, active piezoelectric actuator, and strain sensor are designed and manufactured. Finally, an APHI experimental system is implemented to validate the effectiveness of electromagnetic damping and strain-sensing active control. Additionally, the control effects of acceleration, displacement, and strain sensors are compared. The results demonstrate that strain sensors can achieve effective active damping control, and the control method based on strain sensors can effectively suppress the payload response while maintaining stability. Both displacement and strain sensors exhibit superior suppression effects compared with the acceleration sensor, with the strain sensor showing greater potential for practical engineering applications than the displacement sensor.

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Section: Introductionmentioning

confidence: 99%

Design and Experimental Study of a Hybrid Micro-Vibration Isolation System Based on a Strain Sensor for High-Precision Space Payloads

Guo,

Zhou,

et al. 2024

Sensors

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“…The nested configuration reduces shaft length and increases critical speed, thus becoming a popular bearing arrangement. Different structures of foil bearings and connections with AMBs have been proposed by Nadjafi and Pedro(2000), Foshage and Lovelace(2006) and Lee et al (2014). Nonetheless, the integration of GBs and AMBs is mainly achieved by inserting foil structures into the internal circumference of the AMBs, which is inconvenient for assembly and is prone to abrasion.…”

Section: Introductionmentioning

confidence: 99%

Clearance compatibility and design principle of the single-structured hybrid gas-magnetic bearing

Liu,

Wang,

Feng

2023

ILT

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Purpose This paper aims to study the clearance compatibility of active magnetic bearing (AMB) and gas bearing (GB) to achieve a single-structured hybrid gas-magnetic bearing (HGMB), which uses a single bearing structure to realize both the functions of gas bearing and magnetic bearing. Design/methodology/approach Because the radial clearance size of the AMB is typically ten times larger than that of the GB, radial clearance compatibility of GB and AMB needs to maximize the radial clearance of GB by adjusting structural parameters. Parametric analysis of structural parameters of GB is explored. Furthermore, a general structural design principle based on static analysis, rotordynamic performance and system stability is established for the single-structured HGMB. Findings Load capacity is vastly reduced due to the enlarged radial clearance of the GB. A minimum clearance needs to be ensured by increasing the bearing diameter or width to compensate for the reduced load capacity, yet indirectly raising the bearing load. Increased bearing load is conducive to stability, yet it raises the risk of rotor abrasion. In addition, excessively large bearing diameter leads to system instability, and inappropriate bearing width affects critical speeds. A general structural design principle is established and the designed HGMB–rotor processes optimal performances. Originality/value A single-structured HGMB is proposed to address the urgent demand for high-speed, cryogenic turboexpanders with frequent starts/stops. This design applies a single-bearing structure to realize the characteristics of both GB and AMB, greatly simplifying the implementation, reducing air friction loss and raising critical speeds. This paper provides a fresh perspective on the development of cryogenic turboexpanders for hydrogen liquefaction. It theoretically validates the feasibility and provides a design guide for a single-structured HGMB system.

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“…At present, the specific implementation methods for the suppression of micro-vibration include passive vibration isolation, 11,12 semi-active vibration isolation, 13–16 active vibration isolation, 17,18 and active-passive integrated vibration isolation. 19–21 The active vibration isolation performance is mainly concentrated in the middle and low frequencies, and the passive vibration isolation performance is concentrated in the middle and high frequencies. Combining the active and passive vibration isolation technologies together, that is, the active-passive integrated vibration isolation, which can give full play to the advantages of the two vibration isolation technologies and make up for their respective deficiencies, so that the best vibration isolation effect.…”

Section: Introductionmentioning

confidence: 99%

Design of micro-vibration suppression platform based on piezo-stack array intelligent structure

Wang

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Micro-vibration seriously affects the precision and stability of precision mechanical systems. Aiming at the micro-vibration existing in the semiconductor package positioning system, this paper first designed an active-passive integrated actuator (APIA) based on piezo-stack array, which compensated the mechanical error through the piezo-stack array to improve its positioning accuracy. Based on the APIA, a 6-PUU parallel micro-vibration suppression platform (MVSP) was designed, in which the two APIAs were combined into one and installed on the lower platform along the tangential distribution of the circle, and then the kinematic model of the platform was established. Finally, the PID control algorithm was used to conduct vibration isolation experiments on the MVSP. The experimental results showed that the MVSP had good vibration isolation performance for micro-vibration, the vibration isolation frequency band was above 5 Hz, and the attenuation of micro-vibration signals was between 18% and 64%.

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Control of a hybrid active-passive vibration isolation system

Cited by 20 publications

References 20 publications

Design and Experimental Study of a Hybrid Micro-Vibration Isolation System Based on a Strain Sensor for High-Precision Space Payloads

Design and Experimental Study of a Hybrid Micro-Vibration Isolation System Based on a Strain Sensor for High-Precision Space Payloads

Clearance compatibility and design principle of the single-structured hybrid gas-magnetic bearing

Design of micro-vibration suppression platform based on piezo-stack array intelligent structure

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