CAJ | 학술논문

针对传统缓冲着陆装置阻尼刚度不可调节的局限性,提出采用基于磁流变技术的自适应变阻尼变刚度缓冲装置.首先从理论上研究了采用磁流变阻尼器实现刚度阻尼等效控制的原理,分析了刚度阻尼调节范围;进而设计了基于能量守恒原理和天棚阻尼控制技术的飞行器缓冲着陆的自适应控制器,最后通过数值分析考察缓冲器和控制策略的有效性.分析结果表明,与被动缓冲装置相比,基于磁流变技术的缓冲装置不仅能降低着陆冲击过程的峰值载荷,而且需要的行程也较小,表明设计的缓冲装置和控制策略是有效的.
침대전통완충착륙장치조니강도불가조절적국한성,제출채용기우자류변기술적자괄응변조니변강도완충장치.수선종이론상연구료채용자류변조니기실현강도조니등효공제적원리,분석료강도조니조절범위;진이설계료기우능량수항원리화천붕조니공제기술적비행기완충착륙적자괄응공제기,최후통과수치분석고찰완충기화공제책략적유효성.분석결과표명,여피동완충장치상비,기우자류변기술적완충장치불부능강저착륙충격과정적봉치재하,이차수요적행정야교소,표명설계적완충장치화공제책략시유효적.
To overcome the limitation of traditional absorber systems with invariable damping and stiffness characteristics which can only achieve good absorbing performance under designed conditions, a new absorber based on two magneto-rheological (MR) dampers was proposed to realize the variable damping and stiffness characteristics.As the first step, the theory of variable damping and stiffness characteristics of the proposed absorber was analyzed, and the adjustable range of variable damping and stiffness was also analyzed.Then an adaptive controller based on the energy principle and skyhook control was developed.Finally, a numerical simulation was performed to validate the proposed absorber and the controller.The simulations show that the absorbing system based on the MR absorber could greatly reduce the peak impact load of sprung mass with smaller stroke of absorbing system.Moreover, it has better performance than passive absorbing system, whichshows that the absorber based on MR variable stiffness and damping is feasiblein practice.