Mixed Mode Vibration Testing is less common than Sinusoidal and Random Vibration Testing. However, it does have a special purpose for simulating specialized helicopter vibration or vibration from tracked vehicles such as tanks.
The three mixed modes of vibration testing are:
- Sine-on-Random (SoR)
- Random-on-Random (RoR)
- Sine-on-Random-on-Random (SoRoR)
Some common test standards that have specifications for Mixed Mode Vibration Testing are:
- MIL-STD-810 Department of Defense Test Method Standard for Environmental Engineering Considerations and Laboratory Tests
- RTCA DO-160 Environmental Conditions and Test Procedures for Airborne Equipment