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In this paper, we present a new approach to the problem of simultaneous distributed localization for multiple autonomous underwater vehicles(MAUVs). Cooperative localization(CL) is a crucial cycle for long range navigation of MAUVs. In the leader-follower cooperative structure, a collective estimator is processed in the form of a extended Kalman filter. Different from the normal decentralized filter...
In this study, an electrically powered vehicle has been implemented to perform an unmanned ground vehicle purpose. The steering system is modified to automatically control by installing the DC servo motor at the steering wheel shaft. The compass sensor used as the feedback sensor to measure the current heading angle of the vehicle. The autonomous navigation system determines the general sense of direction...
Focusing on the dynamic model parameter identification problem, this paper proposed an adaptive linear-time-domain system identification method for the micro unmanned helicopter robot. Based on the flash memory in the Micro Guide Navigation Control (MGNC), system recorded the flight data sequences regarding the input signal for servos and output signals for attitude and velocity information. Through...
This paper presents a new, computationally inexpensive, terrain roughness assessment technique. The technique, targeted for high speed unmanned ground vehicles (UGVs), considers no previous knowledge about the terrain but a priori knowledge about the vehicle's characteristics such as damping ratio, natural frequency and wheel configuration. The approach aims to allow fast, smooth and safe transition...
To aim at attaining the control model of an underwater vehicle, an initial method of work-energy principle-based parameter identification is proposed according to the relations of work-energy conversion in the process of a underwater vehicle motion and to the least squares technique. Then identification experiments for a remotely operated vehicle (ROV) are performed in laboratory tank and its parameters...
Research of modern flight control methods for unmanned aerial vehicles (UAVs), which lower the cost and risk associated with the design of actual physical flight systems, has become research hotspot in recent years. However, design of control laws for UAV is complicated and challengeable due to UAV uncertainties, nonlinearity and coupling. This paper proposes a new hybrid controller design scheme,...
Accurate estimation of a wheeled vehicle is essential to increase the vehicle's tranversibility choices in rough terrain. The knowledge of slip parameters can be used in the development of higher-level strategic control of unmanned ground vehicles such as path planning, trajectory tracking and traction control. In this paper, a sliding mode observer is developed to estimate slip parameters based on...
Scientific research and development on the control of autonomous airship have shown a significant growth in recent years. New applications appear in the areas such as freight carrier, advertising, monitoring, surveillance, transportation, military and scientific research. The control of Autonomous airship is a very important problem for the aerial robots research. In this paper, the previous research...
So far, the inspection of power line corridors is mainly carried out by manual or helicopters. However, manual inspection is very labour-intensive and inefficient. On the other hand, the cost of the inspection using helicopters is very high. Also the safety of helicopters cannot be guaranteed. In recent years, some researchers have started to use unmanned helicopters to inspect power lines. Nevertheless,...
The safe takeoff of unmanned aerial vehicles (UAVs) under various wind conditions has been a challenging research for decades. We design an automatic takeoff control system based on the Active Disturbance Rejection Control (ADRC). The automatic takeoff control system consists of a taxiing control subsystem, an attack angle control subsystem, a pitch angle control subsystem, and a smooth switch control...
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