Adaptive control for payload launch vibration isolation

2001 ◽  
Author(s):  
Julian R. Jarosh ◽  
Gregory S. Agnes ◽  
Gregory G. Karahalis
Keyword(s):  
Adaptive Control ◽  
Vibration Isolation

Adaptive control of a two‐stage vibration isolation mount

1990 ◽  
Vol 88 (2) ◽  
pp. 938-944 ◽  
Author(s):  
Scott D. Sommerfeldt ◽  
Jiri Tichy
Keyword(s):  
Adaptive Control ◽  
Vibration Isolation ◽  
Two Stage

Model reaching adaptive control for vibration isolation

2005 ◽  
Vol 13 (4) ◽  
pp. 611-617 ◽  
Author(s):  
L. Zuo ◽  
J.-J.E. Slotine ◽  
S.A. Nayfeh
Keyword(s):  
Adaptive Control ◽  
Vibration Isolation

scholarly journals Summarisation, Simulation and Comparison of Nine Control Algorithms for an Active Control Mount with an Oscillating Coil Actuator

Algorithms ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 256 ◽  
Author(s):  
Rang-Lin Fan ◽  
Pu Wang ◽  
Chen Han ◽  
Li-Jun Wei ◽  
Zi-Jian Liu ◽  
...  
Keyword(s):  
Adaptive Control ◽  
Active Control ◽  
Control Algorithm ◽  
Vibration Isolation ◽  
Feedforward Control ◽  
Operating Conditions ◽  
Control Algorithms ◽  
Force Transmission ◽  
Fuzzy Pid Control ◽  
Adaptive Feedforward

With the further development of the automotive industry, the traditional vibration isolation method is difficult to meet the requirements for wide frequency bands under multiple operating conditions, the active control mount (ACM) is gradually paid attentions, and the control algorithm plays a decisive role. In this paper, the ACM with oscillating coil actuator (OCA) is taken as the object, and the comparative study of the control algorithms is performed to select the optimal one for ACM. Through the modelling of ACM, the design of controller and the system simulations, the force transmission rate is used to compare the vibration isolation performance of the nine control algorithms, which are least mean square (LMS) adaptive feedforward control, recursive least square (RLS) adaptive feedforward control, filtered reference signal LMS (FxLMS) adaptive control, linear quadratic regulator (LQR) optimal control, H2 control, H∞ control, proportional integral derivative (PID) feedback control, fuzzy control and fuzzy PID control. In summary, the FxLMS adaptive control algorithm has the better performance and the advantage of easier hardware implementation, and it can apply in ACMs.

Recent Advances in Shock Vibration Isolation: An Overview and Future Possibilities

2019 ◽  
Vol 71 (6) ◽  
Author(s):  
Diego Francisco Ledezma-Ramírez ◽  
Pablo Ernesto Tapia-González ◽  
Neil Ferguson ◽  
Michael Brennan ◽  
Bin Tang
Keyword(s):  
Adaptive Control ◽  
Nonlinear Systems ◽  
Ground Motion ◽  
Vibration Isolation ◽  
Harsh Environments ◽  
Future Research ◽  
Mechanical Shock ◽  
Recent Interest ◽  
Isolation Requirements ◽  
Increasing Demand

Abstract Mechanical shock is a common problem that is present in many situations, such as ground motion, blast, explosions, crash, and impact. The development of passive, active, or adaptive control and isolation strategies for shock-induced vibration has experienced recent interest, typically due to the increasing demand in improved isolation requirements for sensitive equipment subjected to harsh environments. This paper presents a review of some of the significant recent works developed in the field, focusing on novel developments that contribute to the shock isolation. The article explores several isolation approaches considering passive, active, and nonlinear systems discussing both theoretical and experimental results. In addition, important outcomes of the work are reviewed. The paper concludes with suggestions for potential developments, applications, and recommendations for future research.

Comparison of TEM and STM observations of small silver clusters on different carbon supports

1990 ◽  
Vol 48 (4) ◽  
pp. 264-265
Author(s):  
Bernd Tesche ◽  
Tobias Schilling
Keyword(s):  
Vibration Isolation ◽  
Pyrolytic Graphite ◽  
Carbon Film ◽  
Silver Clusters ◽  
Carbon Supports ◽  
Stacking Order ◽  
System P ◽  
High Resolution Tem ◽  
High Degree ◽  
Degree Of Order

The objective of our work is to determine:a) whether both of the imaging methods (TEM, STM) yield comparable data andb) which method is better suited for a reliable structure analysis of microclusters smaller than 1.5 nm, where a deviation of the bulk structure is expected.The silver was evaporated in a bell-jar system (p 10−5 pa) and deposited onto a 6 nm thick amorphous carbon film and a freshly cleaved highly oriented pyrolytic graphite (HOPG).The average deposited Ag thickness is 0.1 nm, controlled by a quartz crystal microbalance at a deposition rate of 0.02 nm/sec. The high resolution TEM investigations (100 kV) were executed by a hollow-cone illumination (HCI). For the STM investigations a commercial STM was used. With special vibration isolation we achieved a resolution of 0.06 nm (inserted diffraction image in Fig. 1c). The carbon film shows the remarkable reduction in noise by using HCI (Fig. 1a). The HOPG substrate (Fig. 1b), cleaved in sheets thinner than 30 nm for the TEM investigations, shows the typical arrangement of a nearly perfect stacking order and varying degrees of rotational disorder (i.e. artificial single crystals). The STM image (Fig. 1c) demonstrates the high degree of order in HOPG with atomic resolution.

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