Absrrucr In this paper, a new fuzzy sliding mode control scheme is proposed for second-order linear timevarying systems in order to obtain faster error convergence and desired error dynamics. It is well known that a second-order linear time-varying system can be used to model higher order linear time invariant systems piece-wisely. Therefore, it is necessary to do deep investigation for the sta...

The bifurcation and chaos phenomenon which exist in power grid are threats to the stable operation of power grid and the safety of people and equipment. In order to eliminate the chaos phenomena in power grid, a kind of non-singular terminal sliding mode (NTSM) variable structure control method based on immune algorithm is put forward. The second-order model of grid chaotic oscillation is built...

Abstract In this paper, an adaptive fixed-time controller is raised for the manipulator system with uncertain disturbances to boost rate and precision of its trajectory tracking solve convergence time dependence on system's initial conditions. First, a nonsingular sliding mode (SM) surface reaching law based arctangent function are constructed enhance control scheme performance. Second, upper b...

The stratospheric satellite is regarded as an ideal stratosphere flight platform and able to accomplish various missions such surveillance, earth observation, remote sensing, which requires a robust effective trajectory tracking control method support these tasks. A novel observer-based finite-time scheme proposed address the problem dedicated in presence of external disturbance actuator satura...

The flying around monitoring task of space tumbling target is one the key links its on-orbit service. Considering practical constraints system inertia uncertainty, external disturbance, actuator saturation, and fault in engineering practice, a robust composite controller based on radial basis function (RBF) neural network proposed. First, new line sight rotation (RLOS) coordinate system, relati...

In this paper, we extend the sliding mode idea to a class of unmatched uncertain variable structure systems. This method is achieved with introducing a new terminal sliding variable and the finite time stability of proposed method is proved using a new particular finite time condition in both reaching and sliding phases. In reaching phase a new sliding mode controller is derived to guarantee th...

Under-actuated nonlinear dynamic systems trajectory tracking, such as space robots and manipulators with structural flexibility, has recently been investigated for hierarchical sliding mode control since these systems require complex computations. However, the instability phenomena possibly occur especially for long-term operations. In this paper, a new design approach of an adaptive fuzzy hier...