Recent advances and future research directions in semiactive control isolator

Abstract

<p indent="0mm">Sensitive equipment could be disturbed by vibration or shock motion. Hence, an isolator should be installed to protect such equipment. A passive isolator does not adapt to the complicated environment of vibration and shock, and an active isolator always has a large energy consumption and high cost. Compared with such isolators, the semiactive control isolator with slightly extra energy consumption has excellent vibration isolation abilities; hence, it is more stable than active isolators. Moreover, it is more flexible than passive isolators owing to its wider isolation frequency. However, most research pertaining to the isolation performance of semiactive isolators considers a single mode, such as the vibration isolation mode or antishock mode, and few studies have focused on hybrid mode, i.e., both vibration isolation and antishock modes. To investigate the semiactive control isolator with hybrid mode, first, research on the theoretical study and application of semiactive control isolators in the recent decade is overviewed. Further, the isolator performance by considering the aspects of the control algorithm and structure parameters is evaluated. Finally, a guideline for a new semiactive control hybrid isolator system is proposed. The guideline can help improve the control algorithm, optimize structure parameters, create evaluative criteria, highlight unsolved problems, and provide recommendations for future research directions.