Technical Characteristics
Customizable precision and wide range of applications
LKF-MSU300 High-Precision MEMS Inertial Measurement Unit (IMU) is a highly reliable and cost-effective six-axis MEMS inertial sensor module, designed for a broad range of navigation, control, and measurement applications—particularly in inertial navigation and attitude stabilization.
LKF-MSU300 supports custom hardware/software configurations to meet diverse user requirements. For specialized inertial navigation applications, the gyroscope can be upgraded to high-precision or high-dynamic MEMS gyros, ensuring optimal performance for different operational needs.
Advanced processes and technologies
LKF-MSU300 IMU integrates high-performance MEMS gyroscopes and accelerometers within a standalone structure. The selected gyroscopes and accelerometers represent the leading edge of MEMS inertial technology, with 100% domestically sourced electronic components.
- Triaxial MEMS Gyroscopes: Detect angular motion of the carrier.
- Triaxial MEMS Accelerometers: Measure linear acceleration of the carrier.
- Comprehensive Compensation: Includes full-temperature calibration for bias, scale factor, non-orthogonal errors, and acceleration-dependent terms, ensuring long-term measurement accuracy.
- Robust Design: Features reinforced structural design and adhesive sealing to maintain precise measurement of angular and linear motion parameters even in harsh environments, providing users with a highly reliable solution.
High-Precision Manufacturing /System Calibration Technology
The company has developed a series of key technologies during the R&D process to ensure the product's high performance. The system employs high-speed sampling, static error compensation (fine compensation for zero bias, scale factor, and misalignment across the full temperature range), and dynamic error compensation (e.g., coning and sculling errors) to deliver optimal performance in user applications.
Table 1 Performance Parameters Of LKF-MSU300
| Gyroscope |
| Range (°/s) | ±400 |
| Bias(°/h) | ≤2 |
| Bias Stability (°/h, 10s smoothing) | ≤0.3 |
| Bias Instability (°/h, ALLAN) | ≤0.02 |
| Angular Random Walk (°/√h) | ≤0.015 |
| Bias Repeatability (°/h) | ≤0.1 |
| Scale Factor Nonlinearity (ppm) | ≤100 |
| Bandwidth (Hz) | ≥200 |
| Cross-Coupling (rad) | ≤0.001 |
| Resolution (°/s) | ≤0.001 |
| Threshold (°/s) | ≤0.001 |
| Accelerometer |
| Range (g) | ±40 |
| Bias (mg) | ≤2 |
| Bias Stability (μg) | ≤100 |
| Bias Instability (μg, ALLAN) | ≤30 |
| Velocity Random Walk (μg/√Hz) | ≤30(0.018mm/s/sqrt(h)) |
| Bias Repeatability (μg) | ≤100 |
| Scale Factor Nonlinearity (ppm) | ≤300 |
| Bandwidth (Hz) | ≥200 |
| Cross-Coupling (rad) | ≤0.001 |
| Resolution (μg) | ≤100 |
| Threshold (μg) | ≤100 |
| Electrical/Mechanical Interface |
| Power Supply (V) | 5±0.2V |
| Power Consumption (W) | ≤2 |
| Startup Time (s) | ≤2 |
| Communication Interface | 2×RS-422 |
| Update Rate (Hz) | 200(Customizable up to 1000) |
| Dimensions (mm×mm×mm) | 56×56×38.5 |
| Weight (g) | 236±5g |
| Operating Environment |
| Operating Temperature (°C) | -45～80 |
| Storage Temperature (°C) | -55～85 |
| Vibration (g, RMS) | 13 |
| Shock (g) | 1000g/1ms (powered),
20000g/10ms (unpowered, requires customization) |
Table 2 Definition of electrical interface
| Pin | Definition | DB9 Definition | Connect to testing device |
| 2 | RS422 Rx+ | DB9-M1 | RS422 Tx+ |
| 7 | RS422 Rx- | DB9-M2 | RS422 Tx- |
| 3 | RS422 Tx+ | DB9-M3 | RS422 Rx+ |
| 8 | RS422 Tx- | DB9-M4 | RS422 Rx- |
| 6 | GND | DB9-M5 | DC 5V
Power Supply |
| 1 | POWER_IN | DB9-M6 |
Main features
High-precision MEMS IMU
100% domestically sourced components
High performance, compact size, lightweight, low power consumption
Full-temperature calibration compensation (-45°C to +80°C)
1KHz high-speed sampling
Harsh mechanical environment resistance
Supports firmware online updates
Applications
Guidance weapons operating in harsh mechanical/thermal conditions
UAV/vehicle/ship/boat attitude reference
Attitude control systems
Radar/infrared antenna stabilization platforms
Fig. 1 Outline Structure Dimension Diagram
