System Integration, Testing and Final Prototype
This stage focused on transforming the project from a collection of independent subsystems into a fully integrated interactive object. The mechanical structure, embedded electronics, interaction system, power distribution, and enclosure design were progressively assembled and tested together as a single kinetic system.
Unlike previous development stages where components were tested separately, this phase revealed new challenges related to internal space organization, cable routing, structural alignment, movement tolerances, and accessibility during assembly.
1. Integration and Iterative Development
Several redesign iterations were necessary to improve the relationship between the mechanical and electronic subsystems. Small dimensional variations, cable positioning, and component distribution directly affected the reliability of the flower opening mechanism.
The integration process included:
- Internal redistribution of electronic components
- Servo support redesign
- Mechanical spacing adjustments
- Cable routing optimization
- Battery positioning improvements
- Structural reinforcement and alignment corrections
Initial integrated internal layout.
Servo integration and PCB positioning.
Connection between the servo system and the opening mechanism.
Switch and LED mounting features integrated into the enclosure wall.
Alignment and assembly refinement process.
A CAD-based motion simulation was developed to study the opening and closing behavior of the flower. The animation allowed the interaction between the central mechanism and the petals to be evaluated, helping validate the motion concept and identify potential design adjustments before fabrication.
2. Assembly Process
The assembly process involved the integration of all structural, electronic, and mechanical components into a single functional prototype.
| Stage | Assembly Process | Purpose |
|---|---|---|
| 01 | Structural Base Assembly | Preparation of the main enclosure and internal supports. |
| 02 | Servo and Mechanical Support Installation | Integration of the actuation system and movement supports. |
| 03 | Opening Mechanism Integration | Connection between the servo system and central flower mechanism. |
| 04 | PCB and Electronics Mounting | Installation of the control board and electronic components. |
| 05 | Battery System Integration | Incorporation of the portable power supply inside the enclosure. |
| 06 | Cable Routing and Organization | Internal distribution and management of wiring connections. |
| 07 | Switch and LED Installation | Integration of the external interaction interface. |
| 08 | Petal Placement and Alignment | Assembly and calibration of the flower structure. |
| 09 | Embedded Code Upload and Testing | Verification of programmed system behavior. |
| 10 | Final Functional Verification | Validation of the complete integrated prototype. |
Several assembly iterations were necessary to adjust tolerances and ensure smooth movement of the petals without interference from cables or structural components.
3D printed enclosure base with integrated mounting features designed to accommodate the electronic and mechanical components. Dedicated supports, alignment guides, and component holders were incorporated to ensure accurate positioning, simplify assembly, and improve the overall integration of the system.
Installation of the control electronics, servo motor, and status LED inside the enclosure. This stage established the connection between the embedded control system and the actuation mechanism, allowing motion commands generated by the microcontroller to be translated into mechanical movement while providing visual feedback of the system status.
Installation of the power switch used to activate and deactivate the system. The switch was mounted on the enclosure wall to provide easy external access while maintaining a secure connection to the internal electronics and power distribution system.
Installation of the PIR motion sensor and verification of the electrical connections using a multimeter. Continuity and voltage measurements were performed to confirm proper wiring, ensure reliable signal transmission, and validate the integration of the sensing subsystem before final assembly.
3. Power Integration
To improve portability and reduce dependence on external wired connections, a battery pack was integrated into the prototype. This allowed the system to operate autonomously while maintaining the functionality of the sensing, control, and actuation subsystems.
The battery was installed inside the enclosure and positioned to optimize the use of the available space while preserving access to the electronic and mechanical components.
The integration of the power system represented an important step toward transforming the prototype from a bench-test setup into a more self-contained interactive object, enabling greater mobility and a cleaner overall assembly.
4. Testing and Adjustments
After completing the integration process, multiple tests were performed to validate the functionality of the entire system.
| Testing Focus | Implemented Adjustments |
|---|---|
| Mechanical movement reliability | Adjustment of servo rotation limits and movement calibration |
| Servo response consistency | Calibration of timing values and optimization of actuation behavior |
| PIR sensor detection behavior | Adjustment of sensor response timing and detection conditions |
| Stability of the petal opening sequence | Optimization of mechanical spacing and reduction of movement interference |
| Structural resistance and alignment | Reinforcement and repositioning of internal structural supports |
| Internal component organization | Modification of cable routing paths and redistribution of internal elements |
| Battery integration and power stability | Redistribution of internal space to accommodate the battery safely |
| Accessibility for maintenance and assembly | Improvement of component positioning and internal accessibility |
5. System Testing and Validation
Multiple integration tests were performed to validate the complete interaction behavior of the prototype under real operating conditions.
The first tests were conducted with the enclosure open to observe the movement of the mechanism, verify servo response, evaluate sensor behavior, and identify possible interference between moving and static components.
Additional tests were later performed with the enclosure assembled in order to validate the complete interaction sequence and the stability of the integrated system.
The testing process allowed continuous refinement of:
- Servo calibration and movement limits
- PIR sensor response timing
- Mechanical reliability of the opening sequence
- Internal cable organization
- Structural stability and alignment
- Battery integration and accessibility
6. Final Integrated Prototype
The final prototype successfully integrates digital fabrication, embedded electronics, programming, interaction design, mechanical actuation, and portable power into a single autonomous kinetic object.
The integration process was carried out in multiple stages. Initially, the complete mechanical system was assembled and tested using flat, non-thermoformed petals. This intermediate configuration allowed the validation of the opening mechanism, movement sequence, clearances, and structural stability before introducing the final petal geometry.
Once the mechanical performance was verified, the petals underwent the thermoforming process to achieve their final organic shape. The system was then reassembled using the thermoformed petals, followed by additional testing and calibration to ensure that the modified geometry did not introduce unwanted friction, interference, or alignment issues during operation.
The system detects user presence through a PIR sensor and responds by activating the flower opening mechanism through a servo-controlled movement sequence. The interaction creates a direct relationship between the observer and the artifact, allowing the flower to reveal itself only when someone approaches.
This stage validated the complete integration of all developed subsystems, including the mechanical structure, thermoformed petals, electronic control system, embedded programming, and power supply, resulting in a cohesive interactive prototype capable of autonomous operation.