Study on Adjustment and Vibration Isolation System for Adaptive Optics

One of the main trends in modern astrophysics is the use of adaptive optics for high quality limiting characteristics of optical tools, aperture synthesis, automated image processing tools, and the creation of extremely large optical telescopes, among other things. The suggested adjustment system can be used in optical equipment (for adaptive optics, laser mirror adjustment, customising fiber-optic systems, and so on) both on Earth and in space. Using high-precision drive in automated optical-mechanical systems helps correct image distortion caused by various types of agitation - vibratile, thermic, electromagnetic - in real time. The adjustment and vibration isolation system has the following capabilities: improved positioning accuracy in automatic mode, reduced transient process duration, active shock absorption, adjustment and stabilisation of object position, increased number of degrees of freedom during positioning and vibration isolation, self-braking hydraulic cylinders, and smaller overall dimensions. These goals were met by employing a multimotion actuator based on magnetorheological (MR) fluid that was hermetically encapsulated by metal bellows. Adjustment system can be used in ultrahigh vacuum, including open space, thanks to all-metal hermetic bellows. The paper describes the design, operational concept, dynamic performance of the MR drive, and transient process parameters during step-by-step positioning. The calculated data of the MR drive electromagnetic system are given.