A5086570186- Vibration Control and Rheological Fluids
- Seismic Performance and Analysis
- Geophysics and Sensor Technology
- Structural Health Monitoring Techniques
- Dynamics and Control of Mechanical Systems
- Structural Engineering and Vibration Analysis
- Vibration and Dynamic Analysis
- Elevator Systems and Control
- Robotic Mechanisms and Dynamics
- Gear and Bearing Dynamics Analysis
- Piezoelectric Actuators and Control
- Force Microscopy Techniques and Applications
- Sensorless Control of Electric Motors
- Railway Engineering and Dynamics
- Composite Structure Analysis and Optimization
- Tribology and Lubrication Engineering
- Shape Memory Alloy Transformations
- Elasticity and Material Modeling
- Power Systems and Technologies
- Mechanical and Optical Resonators
- Magnetic Bearings and Levitation Dynamics
Shanghai Micro Satellite Engineering Center
2019-2021
Shanghai Jiao Tong University
2012-2015
State Key Laboratory of Mechanical System and Vibration
2013
Shanghai Jian Qiao University
2009
The characteristic of a zero stiffness isolator is given first and the difference between linear one discussed. Three different types displacement shock excitations are applied to base isolator. indices defined analyze characteristics evaluate performance nonlinear absolute responses in time domain maximum ratio for undamped systems presented severity parameters. damped studied compared with that Results show performances related parameters type excitation. It beneficial introduce...
摘要: 提出具有负刚度特性的欧拉屈曲梁结构并分析其静态特性,将负刚度机构和线性隔振器并联使用,设计准零刚度隔振器。如果隔振器的载荷选用得当,系统将在零刚度点平衡,若载荷发生改变,系统平衡点将偏离零刚度点。考虑载荷的影响,对零刚度隔振器进行动态建模,并采用谐波平衡法求解准零刚度隔振器的响应。定义准零刚度隔振器平衡点不在刚度零点时系统的力传递率,分析激励幅值和载荷对隔振器性能的影响并和线性隔振器的性能进行比较。结果表明,所设计的零刚度隔振器具有低频隔振效果,其响应和隔振性能受到激励幅值和载荷的影响,可以使系统的特性从单纯的渐硬刚度向渐软刚度以及渐软-渐硬刚度混合的特性改变,并显著改变系统的传递性能。
In order to study the vibration isolation and positioning performance of noncontact 6‐DOF platform in space microgravity environment, this paper presented a cosimulation model virtual prototype. Based on driven by biaxial Lorentz force actuators (NLFAs), an equivalent dynamic has been established. meanwhile, sliding mode robust controller with exponential convergence disturbance observer is developed. The mechanical system simulation was designed using ADAMS, corresponding decoupling control...
Synthetic Aperture Radar (SAR) satellite is a kind of high-resolution earth observation system. Due to the vibration sensitivity SAR antenna, maintaining stability structure fundamental ensure imaging accuracy , so it particularly important suppress satellite. In this paper, finite element model antenna with integrated relaxation dampers established, maneuvering conditions are simulated and analyzed, influence semi-active control on suppression effect studied. The results show that based...
Vibration transmission between coupled plates has been the subject that many researchers focus on over years. Previous investigations were restricted mostly in area simple supported. In condition, contributions of in-plane vibration to power is ignored. It can simplify calculation mostly, but bring errors as other conditions. And order analyze more complex system with different boundary conditions, it's necessary account for variations coupling and this study, forces including moment, force...
Due to the inherent hysteresis characteristics of smart material, positioning accuracy piezo-driven manipulator was always decreased. Especially in multi-degrees-of-freedom (MDOFs) compliant manipulators driven by multismart actuators, cross-coupled among MDOFs decreased such platforms significantly. In this paper, feature identification and coupled compensation a XY investigated. To establish manipulator, modified Bouc–Wen model has been proposed, Genetic Algorithm-based Particle Swarm...
In order to provide an ultraquiet environment for spacecraft payload, a six‐degree‐of‐freedom microvibration isolation device satellite control moment gyro (CMG) is proposed in this paper. The dynamic characteristics of the are analyzed theoretically and experimentally. equations suppression established by using Newton–Euler method. responses numerically solved frequency‐domain under base excitation analyzed. analytical results first verified numerically, two good accordance. experimental...