## Fluid Power: Components and SystemsThis text is the second in a series reporting on the International Fluid Power Research Workshops held annually in Bath, England. Consisting of the proceedings of the 1989 meeting, the book explores a variety of areas, indicating the breadth of research and development in fluid power components and systems. Among the topics discussed are energy efficient systems for mobile applications; integration of microelectronics with hydraulic valves; mathematical modeling of components and systems; pneumatic systems; a variety of different pumps; dynamometry; hydraulic component and system noise; the problem of pump flow ripple; assessment of pump or motor performance. In addition, three of the papers are concerned with simulation, reflecting the industry-wide emphasis on performance and design. |

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### Contents

Introduction | 1 |

Use of pulsewidth modulation pressure control | 25 |

Hydropneumatic accumulators | 43 |

Copyright | |

15 other sections not shown

### Common terms and phrases

accumulator actuator analysis axial piston pumps Bath behaviour block diagram closed loop coefficient constant curves cylinder described dynamic dynamometer dynamometer system effect efficiency electropneumatic engine equation experimental feedback ferrograms Figure filter flow ripple flowmeter Fluid Power Centre fluid power components fluid power systems frequency domain friction gear pump hydraulic circuit hydraulic systems hydroacoustic hydrostatic impedance inlet input leakage linear linearisation load sensing machine mass flow rate mechanical natural frequency obtained operating conditions orifice P-Q pump parameters performance PID control poppet possible power loss pressure control pumps and motors ratio reference rotational speed rubbing wear particles seat valves sensors servovalve shaft shown in Fig signal simulation slipper plate surface test rig theoretical thermodynamic method tilting couple torque transducer transfer function transfer matrix transmission University of Bath values valve control variable vector viscosity volume Wheatstone bridge