In this paper, a variable structure PID controller with good convergence rate and robustness for satellite attitude is proposed. order to improve the system rate, proportional differential term was designed, an angular velocity curve better achieved by structure. addition, integral partitioning algorithm disturbance torque improved; meanwhile, negative effect of avoided during converging proces...

the cúk converter, which has voltage buck and boost ability, offers high flexibility as an interface device for solar panels. in addition, current ripple can be more reduced because of two input and output inductors at both sides. this paper presents a new application of current-variable inductors in a cúk converter that reduces the size and capacity of storage elements. because of two inductor...

During the operation of valve-controlled cylinder position systems, there are some problems, such as uncertainty and time-varying system parameters, imprecise modeling, external interference. These problems will affect loading accuracy safety reliability electro-hydraulic servo system. This paper used a research object, mathematical model was established. Then, sliding mode variable structure c...