Novel Integral Sliding Mode Variable Structure Control of High Precision LOS Stabilized Platform with Nonlinear Interference

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 the problem of stability when the system moving a large range rapidly, eliminate the phenomenon of ”creeping”, and improve the dynamic and static quality effectively.