To realize online detection of aircraft pilot coupling(APC) or pilot induced oscillation(PIO),this paper presents a recursive algorithm of Fourier transform with a sliding window,the membership functions for relevant features,and the identifying model based on fuzzy logic.

A pilot vehicle system (PVS) mathematical model containing nonlinear control elements of the flight control system is established by the describing function method; the limit cycle of PVS is determined; the relation between the limit cycle and pilot induced oscillation (PIO) and the influence of nonlinear control elements on PIO are explored.

This method is spreaded to some verification flighter with longitudinal digital fly-by-wire system and it can predict the landing flying quality of the flighter, the control frequency of critical unstabily and the control frequency of pilot induced oscillation, so that some useful conclusions can be worked out.

Investigation of Hearing Impairment among Motor Vehicle Drivers;

Analysis of Motorcycle Drivers Physical Examination before Driving in Lengshuitan District of Yongzhou City from 2003 to 2005;

A epidemiological investigation on low back pain of truck driver in plateau;

The effect of 8 hour driving on sEMG signal changes of lumbar muscles and the tibialis anterior muscles in middle-aged male taxi drivers;

Study on hypertension and its risk factors among drivers;

The Psychological Investigation of Bus Drivers.;

The thesis introduces the current state,existing problems and simple improving scheme of the driver doors made by bus-and-coach-self manufacturer,as well as the advantages of the driver doors made by the specialized manufacture.

Then,it is pointed out that the high humid weather distinctly varies with regions and seasons;this characteristic makes the driving environment more complex,brings bad effects to drivers psychology and thus .