It is often difficult to measure all necessary parameters directly in the current stability control systems. This paper presents a nonlinear observer to estimate vehicle’s yaw rate, lateral acceleration, tire side slip angles and the road friction coefficient based on the measurement signals of the Electric Power Steering (EPS) system and the Anti-lock Braking System (ABS). The performances of ...

Usually, a reduced car model contains only the state variables ( speed, body side slip angle and yaw rate), which are essential for the vehicle dynamic and ABS control. When certain of these state variables cannot be measured, observers are implemented without unacceptable expenses. Since in this case the system is a non-linear one, a Luenberger observer is not possible directly to be used. In ...

This contribution describes a real-time model predictive control allocation algorithm for over-actuated electric vehicles with individually driven wheels. The proposed method allows to exploit the inherent redundancy present in these systems to optimally allocate yaw moment and longitudinal force while considering actuator dynamics and complying with rate and wheel slip constraints. A linear fo...

Tire longitudinal forces of electrics vehicle with four in-wheel-motors can be adjusted independently. This provides advantages for its stability control. In this paper, an electric is taken as the research object. Considering key factors such velocity and road adhesion coefficient, criterion studied, based on phase plane sideslip angle sideslip-angle rate. To solve problem that vehicles diffic...

Several approaches for modelling the longitudinal aerodynamic coefficients of a fighter aircraft at high angles of attack, including the unsteady effects are presented. A traditional approach where the model of the coefficient arises in the form of the steady and unsteady effects, the unsteady effect being modelled by means of transfer functions. The second approach uses an internal variable de...

Flight Control is a system that functions as helicopter control center. Failure occurs in flight would certainly result inconvenience of the pilot operating helicopter, even movement can out causing incident or accident. The continuity operation affected by maintenance applied. One mode moving yaw control, could nose to move right and left. Fault Tree Diagram described analytical technique, whe...

A control system is proposed for a low Earth orbit gravity gradient stabilised microsatellite using Z wheel. The microsatellite is 3-axis stabilized using a yaw reaction wheel, with dual redundant 3-axis magnetorquers. Two vector magnetometers and four dual sun sensors are carried in order to determine the full attitude. The attitude was estimated using an Euler angles (small libration version)...

We analyze the observability properties of the kinematic model of an autonomous underwater vehicle (AUV) moving in 3D, under the influence of ocean currents, using range and depth measurements. The results obtained shed light into the types of trajectories that an AUV may be requested to undergo in order to ensure observability, which is a crucial step in the design of single or multiple beacon...