The accumulation of ice on an airplane in flight is one of the leading contributing factors to general aviation accidents, and to date only relatively sophisticated methods based on detailed empirical data and flight data exist for its analysis. This paper develops a methodology and simulation tool for a preliminary yet accurate evaluation of airplane dynamical response and stability and contro...

A recursive least square RLS algorithm for estimation of vehicle sideslip angle and road friction coefficient is proposed. The algorithm uses the information from sensors onboard vehicle and control inputs from the control logic and is intended to provide the essential information for active safety systems such as active steering, direct yaw moment control, or their combination. Based on a simp...

The cutaneous vasculature and eccrine sweat glands are modified by both thermal and nonthermal factors. To determine the effect of thermal stress on the vestibulosympathetic reflex, skin sympathetic nerve activity (SSNA) and cutaneous end-organ responses were measured in 10 subjects during static head-down rotation (HDR) and dynamic yaw and pitch (30 cycles/min) to activate the otolith organs a...

Vision is a key sensory modality for flying insects, playing an important role in guidance, navigation and control. Here, we use a virtual-reality flight simulator to measure the optomotor responses of the hawkmoth Hyles lineata, and use a published linear-time invariant model of the flight dynamics to interpret the function of the measured responses in flight stabilization and control. We reco...

This work addresses the control allocation problem for a nonlinear over-actuated time-varying system where parameters a¢ ne in the actuator dynamics and actuator force model may be assumed unknown. Instead of optimizing the control allocation at each time instant, a dynamic approach is considered by constructing update-laws that represent asymptotically optimal allocation search and adaptation....

Traction control system (TCS) comprises the slip control subsystem and the directional stability subsystem. The slip controller can enhance the traction performance by maintaining the slipratio within a proper range. Additional information about the lateral behavior of the vehicle is necessary to enhance the directional stability during the cornering or lane change on the slippery roads. With a...

Active Front Steering system (AFS) provides an electronically controlled superposition of an angle to the steering wheel angle. This additional degree of freedom enables a continuous and driving-situation dependent on adaptation of the steering characteristics. In an active steering system, there needs be no fixed relationship between the steering wheel and the angle of the road wheels. Not onl...