Abstract: First, the closed-loop transfer function of the position servo system is designed using the "step response optimal criterion". Then, the servo system controller structure is designed. Without increasing the system order, the control system model is improved; this method has strong robustness to the performance parameters of the controlled object. Next, the linear motor position servo system is simulated and optimized using the MATLAM control system toolbox and SIMULINK simulation tool. Finally, the servo system is implemented using a DSP digital signal processing chip. Keywords: Artificial leg; Linear motor position servo; Simulation and design; DSP implementation "g—qi (Institution of Robot tCollege of Information Science and Engineering, Central South Univers[ty, Changsha 410083+China)[/align][/b] Abstract : First, the closed— loop transfer function of position sei-vO system is attained by adopting the optimum crlter[on of step response, then the structure of controller for position servo system is designed; On that condition that the order of system is not increased, enhance model number of control system, the meth0d has better robust performance to performance parameters of controlled object｝And then, linear motor position servo system is simulated and optimized by control toolbox and simulation toolbox provided by the software of MATALAB: Last, the servo system controller is implemented by Digital Signal Processor (DSP). Key words: artificial leg; Linear motor position servo; simulation and design; DSp implement 1 Introduction Throughout history, war, disease, workplace injuries, traffic accidents, and natural disasters have caused countless people to lose their lower limbs, bringing them numerous inconveniences. Since current medical technology cannot regenerate limbs, installing artificial legs (prostheses) has become the primary means of restoring walking function for these amputees. Therefore, research on artificial legs has significant social implications. Currently, there are three types of artificial leg control devices: the first is extension assist devices, the second is mechanical friction devices, and the third is fluid control devices. The third type is the best, as it can generate nonlinear damping very similar to muscle movement. Major artificial leg products include the IP, IP+, and NI-C1 developed in the UK and Japan. Their controllers all use open-loop control structures, resulting in low control accuracy. This project adopts a fluid control device and a speed closed-loop control structure (the speed controller is a fuzzy controller) to improve control accuracy and adaptability during walking. [b][align=center]For more details, please click: Simulation and Design of Linear Motor Position Servo System in Artificial Legs[/align][/b]