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The multiphase PM synchronous motor drive systems have been developed rapidly in modern industry and agriculture. In this paper, an adaptive nonlinear control design is applied to a multiphase PM synchronous motor system. Based on the deduced mathematic model with both electrical and mechanical dynamics of motor, the back stepping and fuzzy neural network control schemes are used to design the speed...
When a high precision LOS stabilized platform runs in a low speed, the precision and performance are always affected by slip-stick. Its reason is the non-linear friction. For dealing with the problem, the paper proposes an new integral sliding mode variable structure controller approach, and designs a novel reaching rule. Actual test results of the system show that the presented controller can solve...
Friction exists in all motions, and friction is the key factor that influences the low velocity performance of servo systems. It usually caused the steady-state error of servo systems and resulted in the creeping phenomenon in low velocity motions. Friction is complicated nonlinear process with time-varying uncertainties. The traditional PID controller of servo systems with fricition was not satisfactory...
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