D. Engels

A method of synthesizing hydromechanical compensation networks for hydraulic servomechanisms

D. Engels, K. Fletcher, 1964 .

The describing functions for a constrained-range integration process with bang-bang input and dead zone

D. Engels, 1967 .

Stabilization and control of the space shuttle orbiter during entry/pitchdown maneuvers

P. Shipley, D. Engels, E. Estrine, 1970 .