Watch a robot swarm "bloom" like a garden

Building a Swarm Garden: The Future of Adaptive Architecture

Imagine a building that can change its shape and color in response to the sun's movement, or one that can adapt to the needs of its occupants in real-time. This is the vision of a team of researchers at Princeton University, who have developed a swarm of interconnected mini-robots that can "bloom" like flowers in response to changing light levels in an office.

The team, led by mechanical engineer Merihan Alhafnawi, has designed a proof-of-concept project called the Swarm Garden, which consists of 40 modular, rearrangeable robotic units called SGbots. These units are connected via a Wi-Fi network to enable a shared communication protocol designed to facilitate collective decision-making.

Each SGbot has a back-facing ambient light sensor to detect lighting changes and a front-facing proximity sensor to enable it to find and communicate with its nearest neighbors. And each SGbot has an actuator designed to retract or extend a thin plastic sheet through a thin slot; the sheets can buckle or open up into a "bloom" in response to environmental stimuli.

The Inspiration Behind the Swarm Garden

The idea for the Swarm Garden was inspired by the behavior of fire ants, which can link together to build towers or floating rafts, and can even regulate their own traffic flow. The researchers were interested in exploring how they could mimic this kind of collective behavior in a robotic system.

"We wanted to create a system that could adapt to its environment in real-time, and that could respond to changing conditions in a way that was both dynamic and beautiful," said Alhafnawi.

The Design of the Swarm Garden

The Swarm Garden consists of 40 SGbots, each of which is approximately 10 inches in diameter. The units are connected via a Wi-Fi network, and are powered by a rechargeable battery that lasts for several hours.

Each SGbot has a back-facing ambient light sensor to detect lighting changes, and a front-facing proximity sensor to enable it to find and communicate with its nearest neighbors. The units also have an actuator designed to retract or extend a thin plastic sheet through a thin slot; the sheets can buckle or open up into a "bloom" in response to environmental stimuli.

Case Studies: Adaptive Shading and Creative Interior Design

The researchers designed two case studies to demonstrate the potential of the Swarm Garden. In the first case study, they used a Swarm Garden for adaptive shading, placing 16 SGbots on an office window and letting them operate continuously for three days.

The SGbots fully extended their sheets to block sunlight when the light was especially strong, gradually buckling as the sun weakened and the room became darker. Additional simulations showed the array also worked well when placed horizontally in atrium spaces.

In the second case study, the researchers used a Swarm Garden for creative interior design, placing 36 SGbots at a public exhibition in April 2024 at Princeton's Lewis Center for the Arts.

In one demonstration, users could cause the SGbots to "bloom" and retract using simple hand gestures. In another, users donned wearable devices so they could induce LED color changes with gestural arm movements. One of the co-authors even performed a live dance while equipped with a wearable device midway through the three-hour exhibition.

The Future of the Swarm Garden

The researchers plan to continue developing the Swarm Garden, with a focus on making it more sustainable and resilient. They also plan to explore more advanced materials and manufacturing techniques to make the SGbots more durable and efficient.

"We envision a future where the built environment is increasingly inspired by living architectures, creating facades that constantly adapt to their surroundings and occupants," said Alhafnawi.

Implications and Applications

The Swarm Garden has a range of potential implications and applications, from adaptive architecture to creative interior design. The technology could be used to create buildings that are more energy-efficient, more responsive to their occupants, and more beautiful and dynamic.

The Swarm Garden could also be used in a range of other fields, from art and design to education and research. The technology has the potential to inspire new forms of creative expression and to enable new forms of interactive and immersive experiences.

Conclusion

The Swarm Garden is a revolutionary new technology that has the potential to transform the way we design and build our environments. By mimicking the behavior of fire ants and other living systems, the Swarm Garden creates a dynamic and adaptive system that can respond to changing conditions in real-time.

The technology has a range of potential implications and applications, from adaptive architecture to creative interior design. The Swarm Garden could be used to create buildings that are more energy-efficient, more responsive to their occupants, and more beautiful and dynamic.

As the Swarm Garden continues to evolve and develop, it has the potential to inspire new forms of creative expression and to enable new forms of interactive and immersive experiences.

Source: https://arstechnica.com/science/2026/01/watch-a-robot-swarm-bloom-like-a-garden/