Model-based design of voltage phase controller for SPMSM in field-weakening region
This paper investigates the nonlinear characteristic between voltage phase and torque and proposes a model-based design of voltage phase controller. PMSM drive systems should realize a quick torque response and have a wide operating range. However, in high-speed region, the control input is voltage phase only and the plant is nonlinear due to the inverter output voltage amplitude saturation. Because of this nonlinear characteristic between current and voltage phase, model-based design have not yet been carried out. As basic study, this paper proposes a model-based voltage phase controller for SPMSM. Simulation results and experimental results show the effectiveness of the model-based design method. In addition, the analysis of the derived plant model shows the relationship between q-axis current and voltage phase is a non-minimum phase system.
To find out the evolution principle of control SME production safety,this article constructed a payment matrix between SME and production safety control agency by the methods of evolutionary economics.Authors disclosed the effect of individuals' choice of policy on group behavior based on analyzing evolution model of interacting process.This paper showed the influence of diversity of decision-making parameters and variation of initial condition on evolution result through reliable numerical simulation.This research found that the evolution of SME' production safety control system converges in two patterns: an ideal status and a "locked" status.Through adjusting parameters,the system may jump out of the "locked" status and the supervision of route can be optimized.Results implied that SME' production safety control system based on evolutionary economics facilitates to improve the effect of control and guide the microcosmic individual evolving to the expectative direction.