A High-Order Sliding Mode Observer: Torpedo Guidance Application

TL;DR

This paper presents a high-order sliding mode observer for torpedo guidance that effectively estimates velocity without chattering, enhancing control precision and robustness against disturbances.

Contribution

It introduces a high-order sliding mode observer tailored for torpedo guidance, addressing velocity estimation challenges and reducing chattering in control.

Findings

Achieves high-precision control with no chattering

Demonstrates robustness against external disturbances

Provides effective velocity estimation without sensors

Abstract

The guidance of a torpedo represents a hard task because of the smooth nonlinear aspect of this system and because of the extreme external disturbances. The torpedo guidance reposes on the speed and the position control. In fact, the control approach which is very solicited for the electromechanical systems is the sliding mode control (SMC) which proved its effectiveness through the different studies. The SMC is robust versus disturbances and model uncertainties; however, a sharp discontinuous control is needed which induces the chattering phenomenon. The angular velocity measurement is a hard task because of the high level of disturbances. In this way, the sliding mode observer could be a solution for the velocity estimation instead of a sensor. This article deals with torpedo guidance by SMC to reach the desired path in a short time and with high precision quality. Simulation results show that this control strategy and observer can attain excellent control performances with no chattering problem.