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Finite state machine impedance control method has been applied extensively in prosthesis control. However, extensive parametric configurations are required. Forthermore, there is no uniform official joint trajectory curve available which must therefore be obtained through virtual constraints. Following complete data processing, parameter configuration is needed to adjust appropriate joint trajectory, and is extremely time intensive. This article provides a smarter GUI interface for data processing. A curve fitting method that can be modified in real time is proposed. This curve fitting method is based on Bezier least squares method and uses MATLAB software to construct a visual GUI with certain generalization ability. The final smooth curve data can be extracted. Experimental data is derived from the knee and ankle trajectories of human motion.

This paper proposes a method of Rogowski coil based IGCT anode current detection to deal with the difficulty in implementation of IGCT converter overcurrent or short circuit protection, the DC bias problem of integrator is overcome by coordinating control signal of gate drive unit (GU) and switch integrator to achieve IGCT multi-pulse DC anode current detection, The feasibility and validity of the proposed method are verified by experimental results.

This paper proposed a four-level step-down soft-switching dc-dc converter that can be applied in electric locomotive auxiliary system. All dc link capacitors of the converter are voltage self-balanced under open loop control. All switches and diodes of the converter can achieve soft-switching condition without sacrificing the reliability. This helps not only to reduce the switching losses, but also to reduce the overall system volume and weight by operating much higher frequency. Modular structure is employed for commercial manufacture and expansion. The operation principles and the voltage balancing mechanism of the dc link capacitors are introduced in detail. The feasibility and validity of the proposed converter are verified by both the simulation and experimental results.