Guidance system

About: Guidance system is a research topic. Over the lifetime, 4282 publications have been published within this topic receiving 45964 citations.

System and method for periodically adaptive guidance and control

Abstract: A system and method that guides a device to an object using periodically adaptive guidance. The guidance and control system creates a reconstructed line-of-sight (LOS) vector to avoid system destabilization associated with small angle approximation during high bore sight engagements. The guidance system adaptively estimates the periodic maneuver of evasive objects with a set of harmonically balance Kalman filter banks. The Harmonically Balanced Kalman filter banks generate a set of probabilities that weight the effect of each individual Kalman filters on a resultant guidance command signal. The guidance command signal generated by the system acts perpendicular to the object LOS. The guidance and control system uses vectored proportional navigation guidance laws, optimal proportion navigation laws and periodically adaptive augmented guidance laws to generate a guidance command signal to supply to an autopilot.

Machine Vision Guidance System for a Modular Climbing Robot used in Shipbuilding

Abstract: During naval construction, vessels are divided into various blocks or subunits that are manufactured in different workshops and then carried to a building dock or shipway where they are welded together. This paper describes a versatile lightweight climbing robot that is capable of moving on the hull and a compact machine vision guidance system that allows it to follow grooves on the surface of the hull. This capability is useful for tasks such as inspecting welding seams, reducing the need for scaffolds. The robot is designed as a three wheeled Synchro-Drive vehicle. That allows it to perform movements in any direction without changing its orientation. The force of attraction necessary to stick the robot to the ship’s hull is provided by three permanent magnets that are placed at the bottom of the robot. To guide this robot when it operates in automatic mode, a real time machine vision system has been developed. This system is prepared to detect and track the groove that is formed between two blocks of a ship when they are joined for welding. This groove is detected by the vision system using a multiline laser beam and a camera with an appropriate filter. The camera used for this application is a compact vision system that includes image capturing, image processing and communications capacities in a single unit.

Partial stabilization-based guidance.

Abstract: A novel nonlinear missile guidance law against maneuvering targets is designed based on the principles of partial stability. It is demonstrated that in a real approach which is adopted with actual situations, each state of the guidance system must have a special behavior and asymptotic stability or exponential stability of all states is not realistic. Thus, a new guidance law is developed based on the partial stability theorem in such a way that the behaviors of states in the closed-loop system are in conformity with a real guidance scenario that leads to collision. The performance of the proposed guidance law in terms of interception time and control effort is compared with the sliding mode guidance law by means of numerical simulations.

Design and modelling of an airship station holding controller for low cost satellite operations

Abstract: Current research has been directed in the use of autonomous airships as less expensive alternatives to satellites. A key component in these applications is the control and guidance systems. In this paper an existing airship has been considered, and the control and guidance laws have been tailored to it. Furthermore, the addressed airship is limited in its control authority. This presents a challenge in these designs. A realistic model of the airship was developed to test the performance of a guidance and control scheme. Simulation results show the efiectiveness of the approach.