Table 2 Model construction variables and their definitions.
From: Research on safety assessment methods based on tasks for aircraft takeoff pitch attitude
Symbol | Variable name | Definition |
|---|---|---|
\(\:{S}_{\alpha\:R}\left({t}_{{\nu\:}_{R}}\right)\) | The pitch attitude safety level during the process of lifting the nose wheel | \(\:{S}_{0R}\left({t}_{{\nu\:}_{R}}\right)\:\:\)denotes the ratio of the takeoff pitch time to meet the requirement to the current duration during \(\:{t}_{{\nu\:}_{R1}}\)-\(\:{t}_{{\nu\:}_{R3}}\);\(\:{S}_{1R}\left({t}_{{\nu\:}_{R}}\right)\) denotes the safety level during \(\:{t}_{{\nu\:}_{R1}}\)-\(\:{t}_{{\nu\:}_{R3}}\) . |
\(\:{S}_{\alpha\:R}\left({t}_{{\nu\:}_{R1}}\right)\) | The pitch attitude safety level at the 1st-second of lifting the nose wheel | \(\:{S}_{0R}\left({t}_{{\nu\:}_{R1}}\right)\:\)denotes whether the takeoff pitch attitude requirement is satisfied at moment \(\:{t}_{{\nu\:}_{R1}}\); \(\:{S}_{1R}\left({t}_{{\nu\:}_{R1}}\right)\) denotes the safety level at moment \(\:{t}_{{\nu\:}_{R1}}\). |
\(\:{S}_{\alpha\:R}\left({t}_{{\nu\:}_{R2}}\right)\) | The pitch attitude safety level at the 2nd-second of lifting the nose wheel | \(\:{S}_{0R}\left({t}_{{\nu\:}_{R2}}\right)\:\)denotes whether the takeoff pitch attitude requirement is satisfied at moment \(\:{t}_{{\nu\:}_{R2}}\); \(\:{S}_{1R}\left({t}_{{\nu\:}_{R2}}\right)\) denotes the safety level at moment \(\:{t}_{{\nu\:}_{R2}}\). |
\(\:{S}_{\alpha\:R}\left({t}_{{\nu\:}_{R3}}\right)\) | The pitch attitude safety level at the 3rd-second of lifting the nose wheel | \(\:{S}_{0R}\left({t}_{{\nu\:}_{R3}}\right)\:\)denotes whether the takeoff pitch attitude requirement is satisfied at moment \(\:{t}_{{\nu\:}_{R3}}\); \(\:{S}_{1R}\left({t}_{{\nu\:}_{R3}}\right)\) denotes the safety level at moment \(\:{t}_{{\nu\:}_{R3}}\). |
\(\:{S}_{\alpha\:P}\left({t}_{{\nu\:}_{D}}\right)\) | The pitch attitude safety level at the moment of the main wheel off the ground | \(\:{S}_{0P}\left({t}_{{\nu\:}_{D}}\right)\:\)denotes whether the takeoff pitch attitude requirement is satisfied at moment \(\:{t}_{{\nu\:}_{D}}\); \(\:{S}_{1P}\left({t}_{{\nu\:}_{D}}\right)\) denotes the safety level at moment \(\:{t}_{{\nu\:}_{D}}\). |
