Is soft robotics more versatile than traditional rigid robotics?

What makes soft robots more versatile than rigid ones?

Soft robots are built from flexible, compliant materials like elastomers and hydrogels, which allow them to deform and adapt to their surroundings in ways rigid robots cannot. A 2022 review in the Annual Review of Control, Robotics, and Autonomous Systems notes that this flexibility and compliance give soft robots the potential to outperform rigid-bodied robots in unexpectedly changing environments and conditions [2]. For instance, a 2025 study on underwater soft robots demonstrated a compact hydraulic control system that could reversibly actuate three independent pumps with a combined maximum pressure of 0.9 MPa and flow rate of 3.6 L/min, enabling precise control of multiple soft actuators for tasks like underwater exploration [1]. This adaptability is a key advantage over rigid robots, which are typically designed for specific, predictable tasks.

Soft robots also excel in applications requiring safe human interaction and delicate manipulation. A 2024 study on flexible strain sensors for soft robots found that traditional rigid robots, made of metal or plastic, lack adaptability in environments like limb rehabilitation or handling fragile objects, whereas soft robot components offer hyper-elasticity and conductivity for safer interaction [5]. Similarly, a 2025 review on soft robotics in automation highlights that soft robots can handle fragile objects, navigate narrow spaces, and interact with humans safely, making them ideal for healthcare, agriculture, and search-and-rescue [6]. These capabilities stem from their ability to deform and respond to environmental stimuli, enabling new automation paradigms that rigid robots cannot achieve.

Where do soft robots fall short compared to rigid robots?

Despite their versatility, soft robots face significant limitations in precision, load capacity, and durability. A 2026 study on public perceptions of soft versus rigid robots found that laypeople associated rigid robots with precision, robustness, and efficiency, while soft robots raised concerns about fragility and emotional dependence [3]. This reflects real engineering trade-offs: soft materials can deform under load, reducing accuracy in tasks like assembly or surgery. A 2026 review on soft robotics materials and actuation notes that challenges remain in material durability, control complexity, and fabrication constraints, which limit the robustness and reliability of soft systems in practical applications [4].

Additionally, soft robots often struggle with high-force tasks and precise positioning. A 2023 study on stiffness tuning in soft robots using granular chain structures showed that while jamming methods can enhance load capacity and compliance, they still face issues like deformation-induced softening, which restricts applications where both large deformation and high stiffness are needed [11]. In contrast, rigid robots excel in high-precision manufacturing and heavy lifting, where their stiffness and control accuracy are unmatched. The 2022 overview of soft robotics also acknowledges that nature is still far more advanced in locomotion and manipulation, indicating that soft robots have not yet matched the performance of rigid systems in many areas [2].

How are researchers making soft robots more versatile without sacrificing performance?

Innovations in materials and design are helping soft robots overcome their limitations. For example, a 2023 study introduced a modular soft robot with origami-inspired skins that enable contraction, bending, and twisting motions from a single actuator design, allowing for fragile object manipulation and locomotion in various environments [10]. This modularity simplifies fabrication and extends functionality, making soft robots more adaptable. Similarly, a 2025 study developed a suction-type soft robotic gripper with a variable diameter, which can adjust to grasp objects of different sizes—a key limitation of fixed-size suction cups [7]. This enhances versatility in everyday scenarios where object shapes vary.

Advanced sensing and control are also critical. A 2023 review on sensing in soft robotics highlights that integrating sensors for force, temperature, and shape perception improves control and enables soft robots to handle delicate objects with human-like dexterity [8]. Additionally, photoresponsive hydrogels, as reviewed in a 2023 study, offer wireless actuation through light, promoting untethered operation and expanding application possibilities [9]. These advances address the control complexity and energy efficiency challenges noted in earlier reviews [6], moving soft robotics closer to practical, real-world use.

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