The lateral stability of Velocity-173, canard-pusher type airplane, has been investigated with and without an extended vertical panel. It is well known that Velocity-173 has an excellent longitudinal stability but a r...The lateral stability of Velocity-173, canard-pusher type airplane, has been investigated with and without an extended vertical panel. It is well known that Velocity-173 has an excellent longitudinal stability but a relatively poor lateral stability. To improve the lateral stability, two types of composite sandwich panel have been designed and attached to the vertical tail of Velocity-173. A series of flight test has been performed to measure the effects of the extended vertical tail. Analytical methods, such as maximum likelihood estimation method and real-time parameter estimation method, have been used to extract lateral controllability/stability derivatives from flight test data. This work validates the effects of an extended panel to the lateral stability.展开更多
室内设计 vs 时装设计买时装和买室内设计有多少相似的地方?大抵两者花费金钱的目的,莫不是为了装饰二字。但凡提及装饰,总是代表有一点不满足、不好的想着要把它修补遮掩过去;好的地方,最好可以把它更张扬开来,让人欣赏它。难怪以往也...室内设计 vs 时装设计买时装和买室内设计有多少相似的地方?大抵两者花费金钱的目的,莫不是为了装饰二字。但凡提及装饰,总是代表有一点不满足、不好的想着要把它修补遮掩过去;好的地方,最好可以把它更张扬开来,让人欣赏它。难怪以往也曾听过专做室内摄影的摄影师用美女来比喻房子。穿衣之道和室内设计之道,也许真有其相近的观点。展开更多
文摘The lateral stability of Velocity-173, canard-pusher type airplane, has been investigated with and without an extended vertical panel. It is well known that Velocity-173 has an excellent longitudinal stability but a relatively poor lateral stability. To improve the lateral stability, two types of composite sandwich panel have been designed and attached to the vertical tail of Velocity-173. A series of flight test has been performed to measure the effects of the extended vertical tail. Analytical methods, such as maximum likelihood estimation method and real-time parameter estimation method, have been used to extract lateral controllability/stability derivatives from flight test data. This work validates the effects of an extended panel to the lateral stability.
文摘室内设计 vs 时装设计买时装和买室内设计有多少相似的地方?大抵两者花费金钱的目的,莫不是为了装饰二字。但凡提及装饰,总是代表有一点不满足、不好的想着要把它修补遮掩过去;好的地方,最好可以把它更张扬开来,让人欣赏它。难怪以往也曾听过专做室内摄影的摄影师用美女来比喻房子。穿衣之道和室内设计之道,也许真有其相近的观点。
