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The paper deals with the output stabilization of the system in the presence of unmatched uncertainties using higher order sliding mode control. Super twisting control is used to achieve second order sliding mode on the defined sliding surface. Here a sliding surface is proposed based on the information of output and observed states. Higher order sliding mode observer (HOSMO) is used to observe the...
A new family of continuous higher order sliding mode algorithm (CHOSMA) for arbitrary relative degree system via continuous control signal is proposed. The convergence conditions for the third order-CHOSMA algorithm is formulated based on homogeneous Lyapunov function. The formula for algorithm of arbitrary order is also suggested. The simulation results are confirmed the efficiency of the proposed...
Gas metal arc welding (GMAW) is the most popular industrial welding process today, preferred for its versatility, speed and relative ease of adapting to robotic automation. This process has been used extensively by many industrial environments especially, the automobile industry. The advantages of automated welding process with feedback controllers include increased productivity, consistency in welding...
In this paper, a methodology for stabilization of fractional discrete-time system based on discrete sliding mode approach is attempted for the first time. The proposed controller is robust in the presence of matched uncertainties. Stability during sliding is analyzed in terms of gamma function based radius using the property introduced by Hilfer [8]. Numerical example along with simulation is presented...
This paper considers the nonlinear surface design for uncertain discrete time system with state delay. Using Lyapunov-Krasovskii method delay-independent conditions are derived for the stable sliding motion along the nonlinear sliding surface. The sliding surface is typically designed to obtain the high speed response without exhibiting the overshoot. This can be achieved by keeping the damping ratio...
A novel Sliding Mode Control (SMC) based Active Queue Management (AQM) algorithm is proposed for control of TCP/IP based network. Modern switching networks are complex time delay process with abrupt time varying behavior of its parameters such as bandwidth, time delay etc., which makes it hard to capture the exact process dynamics for an efficient controller design. Our approach invokes the potential...
This paper presents a new approach for integral sliding mode controller for a class of unmatched uncertain systems. A nominal control is computed using sliding mode techniques which works for unmatched uncertain system. Integral sliding mode is further added to ensure robust reaching phase. A control system for slosh-free motion of a partially filled liquid container is sought. This is representative...
In this paper, we introduce the design method for multirate output feedback based frequency shaped sliding mode control. A switching type reaching law has been used for the vibration suppression of the smart structure. The frequency shaping approach is used to suppress the vibratory modes of smart structure excited during the sliding mode.
Sliding mode design based on Lyapunov matrices is proposed as roll autopilot for a tail controlled missile. The search of Lyapunov matrix for systems with unmatched uncertainties is formulated in terms of linear matrix inequality. The proposed scheme ensures robust roll position control even in the presence of large mismatched parametric uncertainties and external disturbances. The performance of...
This paper presents a new approach to design a sliding mode controller for a class of mismatched uncertain systems. A method is proposed for the design of a switching surface in the presence of mismatched uncertainties. A design method for a sliding mode observer based on high gain is also proposed in this paper to reconstruct the states of the system for the implementation of sliding mode control...
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