Multi-shaker Vibration Testing for Single-Axis and MDOF
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Interest in multi-shaker vibration testing has increased significantly in the past few years. Multi-shaker testing has proven to be very useful for single-axis testing of test articles that are too large to be driven by a single shaker. Multi-shaker testing is also capable of more accurately simulating the actual multi-degree of freedom (MDOF) vibration environment experienced by your products. This course will provide an introduction to multi-shaker testing. It will cover multi-shaker test configurations, including multi-shaker/multi-axis and multi-shaker/single-axis configurations. The course will also cover the basics of multi-shaker vibration control, including measurement of MDOF vibration, selection of the proper number and location of control accelerometers, multi-shaker system identification, and multi-shaker control. Multi-shaker test environments covered will include random, sine, shock, and time waveform replication.
The course will include demonstrations of both multi-shaker/single-axis and multi-shaker/multi-axis testing.
Course outline Who should attend? Course materials Instructor
Course outline
- Overview of Multi-exciter Testing
- Benefits of Multi-exciter Testing
- Multi-exciter Single-axis (MESA) vs. Multi-exciter Multi-axis (MEMA)
- Typical MDOF Coordinate Systems
- Test Equipment Considerations
- Degrees of Freedom vs. Degrees of Constraint
- Common Actuator Arrangements
- Shaker Characteristics
- Bearing/Coupling Considerations
- System Identification for Linear Time Invariant Systems
- MIMO Frequency Response Function
- Matrix Inversion
- Singular Value Decomposition
- Over-determined Control
- Kinematic Transformation
- Transducer Considerations
- Reference Data Considerations (Number and Locations of Control Transducers)
- Reference Point Kinematics for 6 DOF Replication
- Multi Exciter Test Considerations
- Multi-shaker Single Axis
- Single Degree of Freedom (SDOF) vibration on a MDOF Shaker System
- Compensation for Overturning Moments
- SDOF Force and Response Limiting Considerations
- Minimization of Cross-axis Vibration.
- Multi-shaker Multi-axis
- Kinematic Transformation
- 6 DOF Control
- Flexible Mode Control
- Multi Exciter Control Considerations
- Time Waveform Replication
- Random
- Shock (SRS, Transient, Classical Pulses)
- Sine
- Mixed Mode (Sine on Random, Random on Random)
- Demonstrations
- Multi-shaker Single-axis
- Multi-shaker Multi-axis
- Kinematic Transformation
Who should attend?
Information coming soon
Course materials
- Copy of PowerPoint presentation in course binder
- Certificate of attendance for completion of CEUs
Continuing Education Units: .6 CEUs
Instructor
Thomas Reilly