• Cerebral palsy (CP) – neuro-developmental disorder – could happen before, during the after the child is born
• CP could be caused by damage to the brain before birth, brain infection (such as meningitis) after birth, stroke and other reasons .
• Cerebral palsy can severely impair children’s motor function and leading to permanent disability.
• Around 50% of children with CP suffer from an arm-hand dysfunction, especially upper elbow flexion deformity – leading to pain and loss of motion.
• Compared to adults, children are more vulnerable and susceptible to external harm.
• Elbow is a complex joint consisting of three bones and two joints, allowing for two DoFs – flexion/extension and pronation/supination, respectively .
• Conventional treatments are labour-intensive, and the existing adult-oriented wearable assistive robots are unsuitable for children.
Target, requirement and idea
• Novel soft inflatable robot that can aid children in elbow movement whilst minimising the risk of harm.
• Thermoplastic Polyurethane (TPU) and pneumatic actuation were used in developing the soft robot.
• Maximum bending angle ≥ Range of moment of arms (130°) 
• Maximum force generated by the actuator should fulfill the force required to accomplish ADL (0.97 Nm)