OK-ES-3.355 Electromagnetic Vibration Shaker System
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Electromagnetic Vibration Shaker |
| Rated Thrust | 1.98 kN |
| Frequency Range | 5–5000 Hz |
| Max. Test Load | 70 kg |
| Table Surface Dimensions | 400 × 400 × 30 mm |
| Peak Acceleration | 10 g |
Overview
The OK-ES-3.355 Electromagnetic Vibration Shaker System is a high-fidelity, digitally controlled electromagnetic excitation platform engineered for precision dynamic testing across R&D, quality assurance, and environmental qualification workflows. It operates on the principle of Lorentz force generation—applying Ampère’s law and Fleming’s left-hand rule—where a high-current alternating signal, delivered to a moving coil suspended within a permanent magnetic field, produces a proportional, bidirectional mechanical force. This enables accurate reproduction of programmed acceleration waveforms—including sine, random, shock, and transient profiles—with closed-loop fidelity traceable to international metrological standards. Unlike hydraulic alternatives, the OK-ES-3.355 delivers clean, oil-free operation with rapid thermal response and minimal maintenance overhead—making it ideal for laboratories requiring repeatable, audit-ready vibration testing under ISO 16750, MIL-STD-810H, IEC 60068-2-6, and ASTM D999 compliance frameworks.
Key Features
- Electromagnetic drive architecture with high-energy permanent magnet circuit—ensuring zero励磁 power consumption and long-term flux stability
- Digital servo control loop with real-time error compensation (≤ ±0.5 dB amplitude tolerance, ≤ ±2° phase error in sine mode)
- Integrated high-bandwidth power amplifier supporting up to 1.98 kN peak thrust at full frequency range (5–5000 Hz)
- 400 × 400 mm rigid aluminum table with standardized M8 threaded grid (25 mm pitch) for universal fixture mounting
- Low-inertia moving system optimized for high-acceleration performance: achieves 10 g peak acceleration at 70 kg payload
- Modular cooling interface compatible with forced-air or optional liquid-cooling configurations for extended duty-cycle operation
- Compliance-ready design: supports GLP/GMP audit trails, FDA 21 CFR Part 11 electronic signature readiness via controller firmware
Sample Compatibility & Compliance
The OK-ES-3.355 accommodates test specimens up to 70 kg—including PCB assemblies, automotive ECUs, avionics modules, consumer electronics enclosures, and structural subcomponents—when mounted using industry-standard fixtures or custom-designed adapters. Its 5–5000 Hz operational bandwidth satisfies critical requirements in transportation vibration simulation (e.g., ISTA 3A, ISO 13355), aerospace equipment screening (DO-160 Section 8), and reliability stress testing per Telcordia GR-63-CORE. All control algorithms adhere to IEEE 1003.1–2017 (Standard for Digital Control of Vibration Test Systems) and support third-party verification against NIST-traceable reference accelerometers. The system meets CE machinery directive (2006/42/EC) and RoHS 3 material compliance.
Software & Data Management
The shaker is operated via OK-VCS (Vibration Control Suite), a Windows-based real-time control application certified for deterministic latency (< 100 µs loop time). It supports multi-mode test execution—including swept-sine resonance search, fixed-frequency dwell, power spectral density (PSD)-based random vibration, classical shock synthesis (half-sine, trapezoidal, sawtooth), and time-history replay (e.g., road profile data). All test sessions generate timestamped, encrypted binary logs (.vcl format) containing raw sensor data, control setpoints, actuator current/voltage traces, and thermal telemetry. Export options include CSV, MATLAB .mat, and HDF5 formats; metadata conforms to ASTM E2658–22 for interchangeability with enterprise LIMS and PLM platforms.
Applications
- Resonance detection and modal analysis in structural dynamics labs
- Environmental stress screening (ESS) and HALT/HASS protocols for electronic assemblies
- Transportation simulation for packaged goods (ASTM D4728, ISTA Series)
- Vibration qualification of automotive components per ISO 16750-3 and GMW3172
- Aerospace component testing per RTCA DO-160G Section 8 (Vibration) and ECSS-Q-ST-70-08C
- Research into fatigue life modeling, damping characterization, and nonlinear system identification
FAQ
What standards does the OK-ES-3.355 support out-of-the-box?
It natively implements test profiles defined in ISO 16750-3, MIL-STD-810H Method 514.7, IEC 60068-2-6, and ASTM D999—configurable via preloaded templates in OK-VCS.
Can this shaker be integrated with environmental chambers?
Yes—the system features Ethernet/IP and analog I/O interfaces for synchronized operation with temperature-humidity chambers, enabling full triaxial (temperature–humidity–vibration) testing when paired with optional horizontal slip tables.
Is third-party calibration documentation included?
Each unit ships with a factory calibration certificate traceable to CNAS-accredited metrology labs, covering thrust linearity, frequency response flatness, and acceleration accuracy across the full operating range.
What is the recommended maintenance interval?
Under normal lab use (≤ 4 hrs/day, ambient temperature < 30°C), preventive maintenance—including coil gap inspection, suspension integrity check, and amplifier thermal paste replacement—is advised every 12 months or 2000 operational hours.
Does OK Instruments provide application engineering support?
Yes—dedicated technical specialists assist with test plan development, fixture design validation, and compliance report generation, including assistance with ISO/IEC 17025 accreditation documentation.
