用途
- General mechanical mobility measurements
- Experimental modal analysis on most mechanical structures
- SISO, MISO, SIMO and MIMO modal testing applications
- Advanced structural dynamics investigations
- Structural damage detection
- Finite element model correlation
| 特点
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Force rating 200N sine (Type 4825) or 400 N sine (Type 4826)
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Rugged, industrial design
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Extremely high force-to-weight ratio due to rare-earth magnet technology
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One inch peak-to-peak displacement for best low frequency excitation
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High-rigidity, low-mass magnesium armature for minimised force drop-offs at resonance
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Compact construction enabling easy positioning/orientation relative to test object
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Wide frequency range
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Low stray magnetic field
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Built-in air switch for protection against damage related to excessive current
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Built-in optical sensor for accurate determination of armature position
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Ideal for any excitation signal (sine, impulse and random signals)
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Electronic DC control of tension wire pre-tensioning (optional)
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Hole-through design for choice of tension wire stingers . tension wire technology as well as traditional push/pull stinger technology (optional)
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Robust lateral exciter stands for easy positioning and orientation (optional)
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Can be delivered as a complete turn-key excitation system with trunnion, auxiliary hardware and all necessary cables
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4825和4826模态激振器的激振力分别为200N (正弦)和400 N (正弦)，特别适合作为SISO/SIMO试验系统中各种机械部件高精度激励，如汽车结构件、宇航结构、轿车和载货车白车身、发动机、传动系统和驱动系零件。 这种模态激振器也是大型或超大型结构MISO/MIMO试验系统中条件苛刻且不确定激振的理想激振器。基于特殊的稀土钕磁铁技术，4825和4826模态激振器具有极小的物理尺寸，总重量小，带有质量小、刚度大的弹簧支撑动圈。
较低的动圈重量能减少在共振频率时试件的力的分散，确保高品质的力测量。四个射状上挠性支撑(radial flexures)和四个射状下挠性支撑(radial flexures)，后者为稳定性提供了附加导向，形成了强烈的平行导向系统，保持驱动线圈在磁场组件气隙中完全对中。在横向和扭转情况下，褶状结构能提供很高的刚度，阻止试件的旋转运动。 此外，通过这种构造，激振器能吸收大的侧向力，保护其内部不受损坏。
"通孔" 设计使得激振器能使用预紧金属线或传统的推/拉顶杆。通过使用卡盘螺母（用于预紧金属线）或M6到10–32 UNF标准细牙螺母（用于传统的推/拉顶杆），使两种类型都能简便快速地安装。
完整的描述和技术规格，见
产品资料
