Soft Robotic Systems and Actuation Technologies

Soft robotic systems represent a paradigm shift in robotics, replacing rigid links with compliant, deformable materials and architectures that mimic biological organisms. By harnessing actuation technologies such as fluidic networks, electroactive polymers, phase-change composites and stimuli-responsive gels, these robots achieve versatile motion, tunable stiffness and safe interaction with complex environments. Advances in multimaterial fabrication have enabled seamless integration of actuation, sensing and structural elements within a single body, reducing assembly complexity and enhancing performance. Practical applications span from wearable assistive devices and minimally invasive surgical tools to adaptive search-and-rescue crawlers and shape-morphing structures. Key challenges include maximising energy density and strain in soft actuators, embedding distributed sensors for robust closed-loop control, and scaling high-resolution manufacturing methods to produce intricate morphologies. Emerging design principles exploit material programmability and structural hierarchy to implement functions such as locomotion, grasping and fluid transport through purely mechanical intelligence, opening new avenues for responsive, human-safe robotic technologies.

Research from Nature Portfolio

Recent studies have introduced a vision-controlled, contactless jetting technique that automatically prints high-resolution composite systems with integrated actuation and sensing channels. Real-time feedback of three-dimensional geometry allows seamless fabrication of tendon-driven hands, pneumatically actuated walking manipulators, biomimetic pumps and metamaterial lattices in a single process. This digital approach broadens the range of printable chemistries and elastic moduli, supporting rapid prototyping of complex soft robotic components. In parallel, the development of a self-contained soft composite material combining an elastic polymeric matrix with a liquid-vapour phase-change medium has delivered unprecedented strain (up to 900%) and stress (over 1.3 MPa) at low density. Electrically driven and cost-effective, this actuator formulation promises untethered operation of entirely soft machines with high power density and environmental compatibility.

Research from all publishers

Advanced design frameworks employing artificial intelligence now guide the optimisation of soft robot architectures, using machine learning to predict material responses and automate the selection of component geometries for complex tasks. Comprehensive reviews of soft actuation modalities have charted progress in light-activated polymers, magneto-responsive composites, thermal-responsive gels and dielectric elastomers, comparing metrics of force output, response speed and multifunctionality. Critical analyses of soft grippers have classified end-effector strategies into pneumatic inflation, controlled stiffness variation and bioinspired adhesion, emphasising novel silicone‐based elastomer composites and embedded stretchable sensors. These developments illustrate how morphological computation and material compliance can simplify control, enhance adaptability in unstructured environments and enable safe human–robot interaction.

Soft Robotic Systems and Actuation Technologies publication trend

The graph below shows the total number of articles in soft robotic systems and actuation technologies across all publications each year (not limited to Nature Index journals).

Technical terms

Soft actuator: A deformable component that converts external stimuli (fluid pressure, electric field, temperature change) into mechanical motion or force.

Dielectric elastomer actuator: A soft actuator comprising an electroactive polymer film between compliant electrodes that deforms under an applied electric field.

Pneumatic actuation: Actuation achieved by pressurising gas within elastomeric chambers to produce controlled deformation and movement.

Morphological computation: The strategy of embedding computation in the physical form and material properties of a system, reducing the need for complex control algorithms.

Multimaterial fabrication: A manufacturing approach that integrates materials with differing mechanical or functional properties into a single structure for seamless performance.

References

1. Vision-controlled jetting for composite systems and robots. Nature (2023).
2. Advanced Design of Soft Robots with Artificial Intelligence. Nano-Micro Letters (2024).
3. Soft Robotic Grippers. Advanced Materials (2018).
4. Soft material for soft actuators. Nature Communications (2017).
5. Toward Perceptive Soft Robots: Progress and Challenges. Advanced Science (2018).
6. Soft Robotics in Minimally Invasive Surgery. Soft Robotics (2019).
7. Soft Actuators for Soft Robotic Applications: A Review. Advanced Intelligent Systems (2020).