| 摘要 |
PURPOSE: To accurately determine the speed to an air stream of a helicopter of every kind by introducing the variables most correlated with the estimate speeds to all of flight configurations into calculation. CONSTITUTION: An MPU measures speeds Vx , Vy , pitches Po , Px , Py , Pz , bank anglesθx ,θy and an acceleration valueγz at a time when a helicopter is flown according to (N) kinds of flight configrations several times. Next the speeds Vx , Vy are estimated at every flight configuration to be set to a first matrix and all of the variable containing Vx , the variables constructed of the pitches, the bank angles and the acceleration value and a pair of one set of variables are used to calculate a correlation coefficient and a second matrix is also calculated in the same way. Next, a calculation formula having first and second sets of the constructed variables as functions is obtained. Subsequently, the pitches, the bank angles and the acceleration value in usual flight are measured and the speeds Vx , Vy are calculated to be compared with the measured values to display calculated values Vx , Vy .
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