Suspension Motion Control System Report

Suspension Motion Control System Overview

1. System Overview

Suspension Motion Control System is an automated system designed to control the motion of suspended objects in space along a predefined trajectory. Developed by a student team from the Measurement and Control Technology and Instruments major at Xi'an University of Electronic Science and Technology, this system aims to achieve functions like free motion, point-to-point motion, circular motion, and path-following.

2. System Components and Functions

The system mainly consists of the following core components:

1. Controller Module: Utilizes the MSP430F149 microcontroller from TI. This microcontroller is equipped with resources such as 6 8-bit parallel ports (two supporting interrupts), a 12-bit ADC, powerful timers, precision comparators, and a large RAM/ROM capacity, making it capable of handling complex control logic and large program storage.

2. Motor Module: A stepper motor is used for precise motion control of the suspended object. The advantage of the stepper motor lies in its ability to achieve accurate positioning without additional sensors. By adjusting pulse frequency, the motor’s rotation speed can be controlled, enabling precise movement at various speeds.

3. Tracking Module: Uses a reflective infrared photoelectric sensor to provide feedback for tracking a predefined curve on a panel. This sensor is highly sensitive, small in size, light in weight, and immune to ambient light interference, ensuring high detection accuracy.

4. Power Supply Module: The system adopts a dual power supply solution: one for the motor driver (12V) and another for the microcontroller (3V). This effectively avoids interference caused by the high current during motor startup, improving system stability and reliability.

5. Display Module: The LCD screen, compared to traditional LED displays, provides more detailed information with simpler circuitry and lower resource consumption. This makes it easier to read and more intuitive for users.

3. Key Technical Aspects

1. Application of MSP430F149 Microcontroller: The MSP430F149 microcontroller, known for its low power consumption and high performance, coordinates communication between modules and handles complex algorithms to ensure efficient operation of the system.

2. Precise Control of Stepper Motors: The stepper motor’s position control is crucial in this system. The frequency of pulse signals directly influences smooth movement, allowing the system to adapt to various motion scenarios.

3. Design of the Reflective Infrared Sensor: This sensor detects object presence through infrared reflection, maintaining high detection accuracy even under varying environmental light conditions. The sensor array provides real-time position feedback, enabling closed-loop control.

4. Selection of Dual Power Supply: The dual power supply design improves system stability and anti-interference capability, ensuring normal operation even when the motor starts and current spikes.

5. Application of LCD Screen: The LCD screen enhances the user interface by providing real-time system status and motion parameters, which makes debugging and maintenance easier.

4. Conclusion

The Suspension Motion Control System developed by the student team at Xi'an University of Electronic Science and Technology successfully achieves precise control of suspended objects by selecting suitable hardware and carefully designed software algorithms. This system not only demonstrates the students’ solid professional skills but also provides a valuable reference for practical applications. With ongoing technological advancements, similar systems are expected to see further applications and development in various fields.