Peng Zhai

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Due to the high conversion efficiency and good frequency response, Giant Magnetostrictive Actuator (GMA) has been widely used in the machining field. A hysteresis model composed of the phase-lag transfer function and the linearity model is established to meet different working conditions of the GMA. Identifying the parameters in both section, a feed-forward(More)
Some kinds of non-cylinder piston pinhole are introduced. Due to its heavy measurement task with the current instrument, according to its measurement requirements and structural features, a new special measurement instrument for pinhole is developed. To achieve the precision of micron grade, firstly, on the hardware, the high-precision inductive(More)
The paper proposed an optimization procedure to solve the problems of shock and instability in processing the asymmetric pin hole of high load piston. The shape of the asymmetric pin hole of high load piston was described in detail. The motion characteristic of the transition curve was studied. The types of shock in processing the asymmetric pin hole of(More)
Hysteresis nonlinearity is the inherent property of Giant Magnetostictive Material (GMM), Prandtl-Ishlinskii (P-I) model is an effective way to describe and compensate the hysteresis of Giant Magnetostictive Actuator (GMA), while one of the drawbacks of P-I model is the narrow applicable frequency domain. In this paper, A compounding feedforward(More)
The non-dominated sorting genetic algorithm (NSGA-II) is applied to solving a multi-objective optimization problem of a six-bar mechanism that is used in a kind of presses, providing an approach to this problem. Mathematical model of the mechanism is set according to 4 objectives and 11 constraints, and the NSGA-II is flexibly used to deal with(More)
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