Panther Random on Random Control delivers precision and performance in multi-environment vibration testing. Built on Spectral Dynamics' heritage as the inventor of closed-loop digital vibration control, Panther combines advanced adaptive algorithms, comprehensive safety, and intuitive operation to provide trusted results, every time. The Random on Random application enables simultaneous control of multiple independent random vibration sources, providing accurate broadband spectral control for the most demanding test environments. Building upon Spectral Dynamics' legacy of precision and innovation, Random on Random provides the flexibility to replicate multiple environments—such as combined road, acoustic, or powertrain excitations—within a single test. When quality of data is important, Panther sets the standard.
How Random on Random Vibration Test Works
Random on Random testing involves generating several superimposed Gaussian random signals, each with its own control loop, filter, and bandwidth. Panther's powerful digital signal processing allows independent control and continuous real-time PSD monitoring across all bands, ensuring the combined output matches user-defined targets precisely. Using proprietary multiple filters optimized for complex waveform generation and adaptive control, Panther ensures each random component is accurately controlled simultaneously with fast, stable, and repeatable results under full closed-loop control.
Real-time feedback continuously adjusts all signal components to maintain accuracy under nonlinear or time-varying test conditions. Gap-free streaming ensures all data is recorded for post-test analysis with full traceability, while Panther's hardware-synchronized acquisition provides phase coherence better than one degree between all channels up to 100 kHz.
Easy Setup and Flexible Test Configuration
Panther's Random on Random application simplifies even the most complex multi-environment test setups. Through the Library feature, users can instantly access saved setups, data, and reports without navigating complex file paths. The graphical interface allows quick definition of multi-random setups, comparison of data between test runs, and easy retrieval of previous configurations. The interface supports touch-screen operation and customizable layouts for both production and R&D environments. Easily and quickly compare data from different channels and different test runs. Panther's modern, touch-friendly interface makes operation fast and intuitive, for engineers at all experience levels.
Advanced Random on Random Control Technology
- Gap-Free Data Streaming — Records all channel data in real time without data loss to disk with full traceability for post-test analysis.
- Multi-Stream Acquisition — Supports independent sample rates per stream with synchronized sampling across all channels.
- High-Resolution Acquisition — With simultaneous sampling across all channels at up to 262,144 samples per second and 24-bit ADC resolution, Panther accurately captures the full frequency range required for demanding Random on Random testing.
- Powerful Library System — Provides fast access to setups and data with aliasing and favorites for instant recall of complex configurations.
- Multiple Independent Random Sources — Simultaneous control of several superimposed Gaussian random signals, each with independent control loops and filters.
- Adaptive Equalization — Proprietary adaptive control across multiple random profiles ensures precise spectral accuracy for each component.
- True Gaussian Random Generation — Maintains precise spectral control and repeatable test results for each random component.
- Real-Time Control and Monitoring — Continuous PSD correction and monitoring across all bands with stability under nonlinear conditions.
- Independent Bandwidth Control — Each random source can be shaped independently for amplitude and bandwidth to match specific test requirements.
- Automatic NIST-Traceable Calibration — Ensures measurement accuracy with automatic internal calibration and NIST reference accuracy.
- Full Channel Synchronization — Maintains precise phase alignment across all channels (< 1 µs) for accurate multi-axis testing.
- Integrated Safety System — Continuous monitoring at up to 25 times per second with real-time abort thresholds for operator and equipment protection.
Safety Features for Random on Random Vibration Test
Panther continuously monitors over a dozen critical parameters up to 25 times per second. Built-in watchdogs, automatic abort thresholds, and real-time feedback ensure operator and equipment safety. Safety isn't an afterthought — it's designed into the system.
Panther Random-on-Random: Test Lab Applications
- Multi-environment durability tests
- Combined acoustic and mechanical excitation
- Road load replication and fatigue testing
- Aerospace structural qualification
- Broad-spectrum component testing
Panther Random-on-Random: Industry Vibration Test Applications
- Aerospace Vibration Testing
- Automotive Durability & NVH Testing
- Defense & Military Qualification Testing
- Electronics Reliability Vibration Testing
- Transportation & Rail Vibration Analysis
- Energy & Power Systems Vibration Simulation
Related Resources & Technical Documentation
Technical Data Sheet
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Input Subsystem |
Output Subsystem |
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Input Channels: 8 Channels Expandable up to 32 |
Dynamic Range: >110dB |
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Dynamic Range: >110dB |
DAC: 20 Bit |
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ADC: 24 Bit |
Max Output Amplitude: ±12 Volts Peak |
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Voltage Ranges: ±12V to ±0.5V in 8 steps (Auto Ranging) |
Max Output Current: 16 mA |
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Overload Detection: Full scale on all channels, analog and digital detection |
Amplitude Linearity: ±0.20% of value or ±0.03% of full scale |
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Voltage Coupling: AC or DC or GND |
Max Output Rate: 262,144 Samples per Second |
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IEPE Power: 4 mA (24V max into open circuit) |
Image Attenuation: <96dB |
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Max Rated Input Signal: ±35 Volts Peak |
Frequency Accuracy: ±5 ppm |
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Max Sampling Rate: 262,144 Samples per Second |
Reconstruction Filters: Analog 1kHz–25kHz, >96dB attenuation, ±0.15dB ripple |
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Sampling Interval: Simultaneous on all channels |
Output Offset Removal: Digitally Controlled, Accuracy Better than ±0.5% of Full Scale |
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Frequency Accuracy: ±5 ppm |
Channel-Channel Match: ±0.25 dB amplitude, ±1° phase to 100 kHz |
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Freq. Range Reduction: Digital decimation and filtering using on-board FPGA and DSP |
Channel Crosstalk: <-100 dB |
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Anti-Aliasing Filters: Analog (524 kHz cutoff, >105 dB alias attenuation, ±0.10 dB ripple); Digital (variable, >96 dB @ Nyquist, ±0.15 dB ripple) |
Phase between Units: ±1° to 100 kHz |
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Input Impedance: 1 MΩ |
Output Impedance: 60 Ohms |
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Connection Type: Pseudo-differential, 10 Ω to system ground, low side return |
Output Type: Pseudo-Differential, 10Ω to System Ground Low Side Return |
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Calibration: Automatic Internal Digital Calibration (NIST referenced) |
COLA Output Level: 1 Volt Peak (after analog smoothing filter) |
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TEDS Compliant: Yes (IEEE 1451.4) |
Output Cable: Drives up to 50 feet of shielded 50Ω coax |
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Calibration: Internal Digital Calibration (NIST referenced) |
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Host Communication: USB / Ethernet / Optional Wi-Fi |
