Implement of Electro-Hydraulic Servo Control of Aero Variable Stroke Plunger Pump

Abstract:

As the working conditions of electro-hydraulic servo valves are different between applications in fuel control of aero turbo engines and in industry, this paper examines the influence of varying supply pressure on the servo control of a variable stroke fuel pump. An aero swash plate axial plunger fuel pump was rebuilt and a hydraulic-valve controlled cylinder system formed to alter the angle of the swash plate. Tuning of the PID control is possible according to the variation of the supply pressure. Experiments showed the servo control is effective and the swash plate of the pump moves faster at higher supply pressures as shown in Figure 6.

• Periodical: Advanced Materials Research (Volumes 443-444)
• Pages: 313-318
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.443-444.313
• Online since: January 2012
• Authors: Hong Liang Pan, Jie Yan
• Keywords: Electro-Hydraulics, PID Control, Pump Displacement Control, Tuning

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[14] Merritt, H. E. Hydraulic control systems. 1976, New York: Wiley. Figure 4. Block diagram of the control loop Figure 5. Fuel flow rate vs. position of the cylinder (left) & vs. pump shaft speed (right) Figure6. History of the piston position at different working conditions.