Technical Characteristics
Wide range of applications to suit diverse needs
LKF-MSU301 is a six-axis MEMS inertial measurement unit based on micro-electro mechanical systems (MEMS), featuring high reliability and competitive price. It can be widely used in the fields of navigation, control and measurement represented by vehicles, ships and unmanned aerial vehicles, and can meet the needs of most users.
Advanced processes and technologies
The LKF-MG404 integrates high-performance MEMS gyroscope and MEMS accelerometer within an individual structure, and the gyroscopes and accelerometers selected for the system represent the leading level of inertial devices in the MEMS process. The three-axis MEMS gyroscope is sensitive to the angular motion of the carrier, and the three-axis MEMS accelerometer is sensitive to the linear acceleration of the carrier. The system internally compensates for the bias of the full temperature parameters, the scale factor, the non-orthogonality error, and the acceleration-related terms, so that it can maintain a high measurement accuracy for a long time.
High quality and reliability
LKF-SU301 is made of aluminum alloy with strict manufacturing process. Under normal use conditions, the unit can maintain stability for a longer period of time, with strong resistance to harsh mechanical environments, and after strict testing and quality control, it can meet the high reliability requirements of aerospace, military, industrial automation and other fields.
For example, the LKF-MG404 can measure the acceleration and angular velocity of the UAV, providing precise data for the UAV, improving flight accuracy and reliability, and helping the UAV to navigate, control and stabilize.
Table1 MSU301 Main Parameters
| Gyroscope |
| Range(°/s) | ±400 |
| Bias(°/h,1σ @full-temperature) | ≤1 |
| Bias Stability (°/h, 10s smoothing) | ≤0.5 |
| Bias Stability (°/h, Allan) | ≤0.05 |
| Bias Repeatability (°/h) | ≤0.3 |
| Angle Random Walk (°/√h) | ≤0.05 |
| g-Sensitive Drift (°/s/g) | ≤0.0005 |
| Cross-Coupling (rad) | ≤0.001 |
| Scale Factor Nonlinearity (ppm) | ≤100 |
| Bandwidth (Hz, adjustable) | 100 |
| Accelerometer |
| Range (g) | ±20 |
| Bias (mg, 1σ @ full-temperature) | ≤1 |
| Bias Stability (mg, 10s smoothing) | ≤100 |
| Bias Stability (mg, Allan) | ≤30 |
| Bias Repeatability (mg) | ≤100 |
| Scale Factor Nonlinearity (ppm) | ≤150 |
| Cross-Coupling (rad) | ≤0.001 |
| Bandwidth (Hz, adjustable) | 100 |
| Electrical/Mechanical Interface |
| Supply Voltage (V) | 5±0.2 |
| Power Consumption (W) | Typ: 2 Max: 3 |
| Start-up Time (s) | 2 |
| Communication Interface | 1 × RS-422 channel, 1 × sync input, 1 × sync output |
| Update Rate (Hz) | 200 |
| Dimensions (mm) | 64.8mm×47mm×35.3mm |
| Weight (g) | 165±5 |
| Operating Environment |
| Operating Temperature (°C) | -40～80 |
| Storage Temperature (°C) | -55～85 |
Table2 MSU301 Inertial Measurement Unit Connector External Pin Definitions
| Pin | Definition | Remarks |
| 1 | VSUP | Power Positive (+5V) |
| 2 | COM1_Rx+ | RS422-1 RX+ |
| 3 | COM1_Tx+ | RS422-1 TX+ |
| 4 | PPS IN+ | GPS Sync Pulse Input+ |
| 5 | TOV+ | Differential Sync Signal Output+ |
| 6 | GND | Power Ground |
| 7 | COM1_Rx- | RS422-1 RX- |
| 8 | COM1_Tx- | RS422-1 TX- |
| 9 | PPS IN- | GPS Sync Pulse Input- |
| 10 | TOV- | Differential Sync Signal Output- |
Main Features
Small size, light weight
low power consumption
-45°C to +80°C full temperature calibration compensation
12KHz high speed sampling
Replacement for Honeywell’s HG4930
Resistant to harsh environments
With software online upgrade function
Applications
Directional vehicle navigation
Radar/infrared antenna stabilization platform
UAV attitude reference/track control
Projectile flight control
Vehicle/Vessel attitude measurement
Harbor measurement systems
Satcom on the move
Drilling systems
Mobile mapping system
Automated driving test system
Individual-soldier navigation system
Figure 1 Dimension 
