According to the requirements of rehabilitation training

an embedded control system of knee-joint rehabilitation trainer based on embedded operating system Linux OS is designed.32bits processor S3C2440 is used as core control unit.The system architecture and hardware are designed

some key technologies are discussed

such as the embedded Linux driving program design and the applications program design based on Qt/Embedded.Experimental results show that the embedded control system is reliable

easy to handle and can control the device to realize isokinetic continuous passive motion and isokinetic active resistance motion.This provides the guidance for the design of embedded control system of similar medical devices.