Active and passive integrated vibration isolation device and vibration isolation platform

Abstract

The invention discloses an active and passive integrated vibration isolation device and a vibration isolation platform. The vibration isolation device comprises an elastic plane net structure, an active electromagnetic dynamic vibration absorber, and a piezoelectric stack actuator. The elastic plane net structure is formed by weaving steel wires in a tensioning and crossed manner. The active electromagnetic dynamic vibration absorber is arranged on the intersection of a central region of the elastic plane net structure. The piezoelectric stack actuator is arranged on the edge position of the elastic plane net structure. The vibration isolation platform comprises the vibration isolation device, a bearing cylinder, an intermediate support, and a control system. A satellite attitude control device assembly is arranged on the intermediate support. The intermediate support is installed on the vibration isolation device. The vibration isolation device is installed on the inner side of the bearing cylinder. The control system is used to control the active electromagnetic dynamic vibration absorber according to vibration acceleration information of the intermediate support, and control the piezoelectric stack actuator according to the vibration acceleration information of the bearing cylinder. The vibration isolation device and the vibration isolation platform are effective for low-frequency line spectrum, and have good control effect on broadband random excitation.

Description

Technical field [0001] The invention relates to the field of vibration reduction, in particular to an integrated active and passive vibration isolation device and a vibration isolation platform used for on-orbit micro-vibration control of satellite attitude control equipment. Background technique [0002] With the establishment of a large number of civil or military surveying and mapping, reconnaissance, deep-space reconnaissance, astronomical observation, laser communications and other satellite projects, these projects continue to upgrade the satellite pointing stability and observation resolution requirements, scientific researchers from relevant research institutions have found Satellite attitude oscillation, satellite rotation or micro-vibration interference of reciprocating parts on the satellite platform is gradually becoming a bottleneck restricting the use of highly sensitive payloads. For precision instruments and equipment working in a space environment, excessive vibr...

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Problems solved by technology

[0004] One is to reduce the vibration output energy of the vibration source, but the current manufacturing level and technological level can only reach the current minimum static unbalance and dynamic unbalance; in order to meet the requirements of high-precision and very high-precision payloads, various vibration must be adopted control measures

[0005] The second is to control and optimize the structural parts in the micro-vibration transmission path, such as using local stiffness optimization to dynamically correct and optimize the structure of the mounting bracket or satellite load-bearing cylinder, or to lay a constrained damping layer in areas with large structural strains, but when When the frequency of the disturbance source is much lower than the first-order natural frequency of the structural plate (above 100 Hz), it is difficult to exert the vibration reduction advantages of the constrained damping layer

[0017] (3) The advantage of active vibration reduction is that it can obtain large-scale vibration attenuation (especially low frequency), which is suitable for high-precision control, but its disadvantages are also obvious, such as complex system, energy consumption on the planet, and effective weight and space of the aircraft. etc., when active control is used, controllable force sources such as lightweight high-precision drives, electromagnetic drives (voice coil motors, inertial actuators) and smart material drives are required to generate micro-amplitude excitation balance according to a given control law interference source excitation

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