The integrated use of analog and digital computing machines for aircraft dynamic load problems

This paper describes the techniques and methods used in investigating aircraft dynamic load problems such as vibration, flutter, gust loads, taxi and landing loads, based on an integration of both analog and digital facilities to provide maximum information on a problem in a minimum of time with a guarantee that the results are correct. The last requirement is an important consideration since high-speed computing machines not only provide the possibility of investigating far more complex dynamic problems but, unfortunately, also extend the probability of introducing errors due to the additional complexities of the problem.

The advantages and disadvantages of both the digital and analog computers in terms of the needs specified for the aircraft dynamic problems are discussed; a method of analysis is suggested using the best features of each in a closely integrated manner. An example is presented of a typical dynamics problem for a transport type airframe.