By Jim Sullivan
A-3 Skywarrior in motion КНИГИ ;ВОЕННАЯ ИСТОРИЯ Издательство: Squadron/Signal publicationsСерия: plane 148Автор(ы): Jim SullivanЯзык: EnglishГод издания: 1995Количество страниц: 51ISBN: 0-89747-328-0Формат: pdfРазмер: 29.5 mbRapid eighty five
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Extra resources for A-3 Skywarrior in action
2 . 6 Desired valve profile and the tracking errors when k = 1, 5, 10 (top to bottom). 7 500 bandwidth in both the actuator and the control system, which exceeds the capabilities of the state-of-the-art electrohydraulic servo system. To overcome this challenge, as will be shown in the next section, we are able to convert this aperiodic profile tracking problem into a periodic profile tracking problem plus tracking of a constant signal with time- varying duration. 2, regardless of constant or varying engine speed, to precisely track the valve profile in real time, a high-bandwidth response of the FFVA system is required.
Detailed dynamics models of the system have been built. 3 . The results clearly demonstrate the precise control of valve lift, seating velocity, and duration. 2 Valve Actuator Model and Control For fully flexible valve actuation systems, since there is no mechanical link between the crankshaft and the engine valve, feedback control is critical to achieve precise valve motion. Control system design for FFVA systems has been explored by a number of researchers. Richman and Reynolds  presented the development of an electrohydraulic valve actuation system.
Anderson et al.  presented an adaptive peak lift control for an electrohydraulic system. Valve event consistency was affected by the nonlinearity of the device and slow response of the solenoid valve. Misovec et al.  presented the digital valve technology applied to the control of a hydraulic valve actuator. Optimal control and proportional control were applied to drive the hydraulic valve to track a 1 Hz sinusoidal curve. 3 Comparison between model simulation and experimental results. 06 Design, Modeling, and Control of Internal Combustion Engine 27 28 Design and Control of Automotive Propulsion Systems for the iterative learning control of an electromagnetic valve actuator to handle the gas flow force to improve system performance.