Hydraulic and Electric-Hydraulic Control Systems

1. Part 1

   1. The Electronic Interface

      • R. B. Walters

      Pages 173-178

   2. System Enhancement

      • R. B. Walters

      Pages 179-199

   3. Analysis of Pressure Control System

      • R. B. Walters

      Pages 200-208

   4. Efficiencies and Power Dissipation

      • R. B. Walters

      Pages 209-215

   5. Elastically Mounted Mass Systems

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      Pages 216-223

   6. The Flow Feedback Option

      • R. B. Walters

      Pages 224-229

   7. Non-Linearities

      • R. B. Walters

      Pages 230-236

   8. Steady-State System Analysis

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      Pages 237-241

   9. Applications

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      Pages 242-243

   10. National and International Standards

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       Pages 244-244

2. System Simulation Package HYDRO ANALYST

   1. Introduction

      • R. B. Walters

      Pages 245-245

   2. Structure

      • R. B. Walters

      Pages 246-247

   3. Modules

      • R. B. Walters

      Pages 248-269

   4. How to Get Started (Browsing)

      • R. B. Walters

      Pages 270-271

   5. Guided Tour (Tutorial Mode)

      • R. B. Walters

      Pages 272-274

   6. Worked Examples

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      Pages 275-280

   7. Loop Gain Selection

      • R. B. Walters

      Pages 281-282

   8. Applying a Duty Cycle

      • R. B. Walters

      Pages 283-284

   9. Automatic Looping

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      Pages 285-286

   10. System Enhancement

       • R. B. Walters

       Pages 287-289

Force and motion control systems of varying degrees of sophistication have shaped the lives of all individuals living in industrialized countries all over the world, and together with communication technology are largely responsible for the high standard ofliving prevalent in many communities. The brains of the vast majority of current control systems are electronic, in the shape of computers, microprocessors or programmable logic controllers (PLC), the nerves are provided by sensors, mainly electromech­ anical transducers, and the muscle comprises the drive system, in most cases either electric, pneumatic or hydraulic. The factors governing the choice of the most suitable drive are the nature of the application, the performance specification, size, weight, environ­ mental and safety constraints, with higher power levels favouring hydraulic drives. Past experience, especially in the machine tool sector, has clearly shown that, in the face of competition from electric drives, it is difficult to make a convincing case for hydraulic drives at the bottom end of the power range, specifically at fractional horsepower level. A further, and frequently overriding factor in the choice of drive is the familiarity of the system designer with a particular discipline, which can inhibit the selection of the optimum and most cost-effective solution for a given application. One of the objectives of this book is to help the electrical engineer overcome his natural reluctance to apply any other than electric drives.

• algorithms
• feedback
• hydraulics
• simulation
• structure
• system

• Wembley, UK

  R. B. Walters

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