1. Background Significance
This study investigates the structure and workflow of a discrete shipborne strapdown reference system and proposes a benchmark design scheme for a ship’s strapdown control system based on ARM + DSP embedded technology. The hardware system structure is designed, the structure and working principle of the closed-loop fiber optic gyroscope are analyzed, and finally, tests on pitch and roll angles are conducted. The test results indicate that the system has high measurement accuracy and stability.
2. Theoretical Principles
The reference information in the discrete shipborne strapdown reference system mainly consists of three axial attitude angles and angular velocities, forming a fully autonomous strapdown inertial navigation system. This system can perform precise navigation calculations with the assistance of sensors such as gyroscopes, thereby enhancing the ability to obtain the accuracy of the ship’s attitude at different positions.
In the entire hardware design scheme, the ARM microprocessor is responsible for signal acquisition, while the TMS320F6678 is responsible for processing the collected data. At the signal acquisition end, signals from fiber optic gyroscopes, accelerometers, GPS, radars, etc., are collected, and after amplifying and filtering the sensor signals for preprocessing, A/D conversion is used to convert the analog signals into digital signals for processing by the ARM processor.
3. Experimental System and Conditions
The system is arranged on the ship for simulation testing, and the test results are compared with the actual angles to calculate the corresponding errors, yielding results as shown in Figures 6 and 7. The results indicate that the pitch angle error of the system test is within ±0.1°, and the roll angle error is within ±0.15°. The analysis suggests that the sensor layout and the ship’s structure may have a certain impact on the measurements, and the ship’s heading may cause the roll motion to be more susceptible to wave effects than the pitch motion.
4. Experimental Results and Analysis
Based on the measurement results presented in this paper, it can be demonstrated that the designed ship’s strapdown control benchmark system based on embedded technology has high precision. Although a temperature compensation algorithm was added to the closed-loop fiber optic gyroscope, the determination of the ship’s strapdown reference remains sensitive to factors such as the marine environment and vibrations. Data fusion is an important research direction for constructing strapdown reference systems in the future.
5. Conclusion
To fully leverage the power and strike accuracy of shipborne weapons, real-time attitude measurements at different positions on the ship are required. Traditional ship strapdown control systems cannot solve the attitude measurement problem for weapons at different positions on the ship. This paper proposes a benchmark design scheme for a ship’s strapdown control system based on embedded technology, designs the hardware structure, explains the working principle of the core component, the closed-loop fiber optic gyroscope, and finally tests the system, with results indicating that the system has high measurement accuracy.
References:
[1] Zhou Yinxiang. Benchmark Design of Ship’s Strapdown Control System Based on Embedded Technology [J]. Ship Science and Technology, 2024, 46(18): 175-178.
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