A simplified yaw-attitude modeling, consistent with Bar-Sever (1996), has been implemented and tested in the NRCan PPP software. For Block IIR GPS satellite it is possible to model yaw-attitude control during eclipsing periods by using the constant hardware yaw rate of 0.20 /s. The Block IIR satellites maintain the nominal yaw attitude even during a shadow crossing (Y. E. Bar-Sever, private com...

A suitable and effective control strategy is a prerequisite for achieving the stable driving of distributed drive electric bus. In order to effectively utilize advantage independent controllability each rear wheel, this paper designs compares two direct transverse moment strategies sliding mode self-correcting fuzzy distributes torque in combination with vehicle steering constraint. Moreover, b...

The lateral stability control of the vehicle can avoid serious traffic accidents when it had a tire blowout during operation. This article proposes robust nonlinear method for controlling after blowout. To be exact, seven degree freedom dynamic model with modified Dugoff is established. yaw moment performed by differential braking once occurring. As strategy, taking linear two as reference, usi...

The biomechanical properties of an animal's locomotor structures profoundly influence the relationship between neuromuscular inputs and body movements. In particular, passive stability properties are of interest as they may offer a non-neural mechanism for simplifying control of locomotion. Here, we hypothesized that a passive stability property of animal flight, flapping counter-torque (FCT), ...

It is well known that yaw can affect the penetrative power of armour piercing rounds. To investigate this effect purely experimentally is difficult because the typical ballistic set up does not allow control over the yaw angle of the projectile. In this study, a numerical model is used complementing ballistic experiments for a range of yaw angles. For the projectile, a validated computer model ...

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...

This paper presents a novel chassis structure for advanced mobility platforms, using caster wheels with disturbance observers, and independent driving motors. The system consists of two independent driving wheels and two caster wheels. The proposed configuration enables the vehicle to have: a low mechanical stiffness against the direct yaw moment input because caster wheels are free to rotate; ...

A convergence-based anti-windup control strategy is presented and demonstrated by the example of aircraft yaw control problem.

A curve negotiation task at a prescribed and constant velocity was performed in the presence of external disturbances. The driver’s goal was to simultaneously minimize the heading error and lateral position error. The present paper investigates the separate contributions of the road tracking and the disturbance to the heading and position errors, and more important, the effect of motion on thes...