VEHICLE UNITS DYNAMIC STATE CONTROL METHOD Russian patent published in 2008 - IPC B60W40/00 

FIELD: transport.

SUBSTANCE: a priori, the minimum tolerable time t min.tol. for the i-th unit Pi parameter is determined for the said parameter to reach its threshold value Pi(thr) sufficient for adequate reaction and response of driver to prevent reaching the aforesaid threshold value and/or the unit failure. The parameter Pi is checked up periodically, in time intervals Dt, the Pi variation direction is determined and, given its approaching the threshold value Pi(thr) at every k-th time moment, the estimated time ti(k)p of reaching Pi(thr) is calculated. In the case of linear variation of the fi(t) function, the current value of Pi(k) is compared with the previous value Pi(k-1) to determine ti(k)p, while ti(k)p is determined from the differences Pi(thr)-Pi(k), Pi(k)-Pi(k-l) and time interval Dt. In the case of the known nonlinear law of the fi(t) function variation, its first and second derivatives are determined. With the positive first derivative, the fi(t)-Pi(thr)=0 equation roots are calculated. Given the root real values, their least positive value in the interval from k-th time interval to the time of reaching Pi(thr) is taken to be fi(k)p. Finally, ti(k)p is compared to ti min.tol. and, if ti(k)p decreases to ti min.tol. the actuators are triggered off to switch the vehicle unit over to the rated conditions.

EFFECT: higher control accuracy and efficiency.

5 cl, 2 dwg