Electrical Inertia Simulation Contraction Than The System Improvement And Resistance Torque Compensation

By studying the electric inertia simulation, an 800:1 reduction ratio of the uniaxial bench used to study the simulation principle and control algorithm, has been developed. Because of the unsatisfied effective of inertia simulation bench, an improvement program is proposed and implemented on DSP.In the scaled bench, affected by the proportional coefficient K of the single neuron PID control algorithm, control performance becoming worse in the simulation of large inertia. A hybrid control method is proposed which integrates the advantages of variable universe fuzzy control theory and Bang-Bang control theory, to improve the response speed and static performance during inertia simulation. On the use of variable universe fuzzy control algorithm to suppress overshoot of the system, reduce steady-state error; and using Bang-Bang control theory to reduce rapidly the system's large deviations and improve the response speed. The fuzzy switching is used for eliminating the jitter caused by switching.The system identification result is not accurate because the resistance moment is difficult to measure. According to the conversion between power and energy, we propose resistance moment compensation algorithm based on energy to amend system model. According to the energy loss of resistance moment in the previous process, the resistance is compensated real-timely in the next process. The whole compensation process for resistance moment is completed by the iterative calculation.Taking into account PLC's poor floating-point operations and improved control algorithm requires real-time computing, a new control system is developed based on TMS320F2812. The control algorithm is successfully implemented because of the DSP chip owns 150MIPS processing speed and a powerful floating-point computing performance; PCI bus is used to improve the communication speed between DSP and IPC.Finally, comparative analysis about the improved control system and old system is done in scaled bench to verify the effectiveness of the improved scheme, which can provide reference rolling test bed for the motor car.