SteerbyWire Systems with Integrated Torque （SteerbyWire系统与集成的扭矩）.pdfVIP

Steer-by-Wire Systems with Integrated Torque Feedback Improve Steering Performance and Reduce Cost Geoff Rondeau, Product Manager Thomson Industries, Inc. Wood Dale, IL 540-633-3549 Hydraulic steering systems have long dominated the industrial utility vehicle market because of their familiarity both to vehicle designers and operators. More recently, a trend has been seen towards the use of electronic steer-by-wire systems that provide greater design flexibility by enabling software to customize the connection between the steering wheel and steering mechanism. Several suppliers offer integrated steer-by-wire systems targeting the industrial utility vehicle market. A key differentiating factor is the method used to provide torque feedback to give the operator a heightened sense of vehicle control. The latest generation of integrated steer-by-wire systems consume less power, are less expensive, and offer the ability to be programmed to provide a wide range of value-added features. Moving away from hydraulic steering Hydraulic steering technology has been used in industrial utility vehicles for decades. Engineers are familiar with its ruggedness in unfriendly environments, and its power density which enhances performance in the most difficult applications. But recent trends in the industry position hydraulic steering as less advantageous for many industrial utility vehicles. Hydraulic steering systems require a motor, pump, valves, hoses and fittings. Utility vehicles that utilize hydraulic drives for other functions may or may not have a hydraulic pump with enough capacity to accommodate the steering system. There has been a general trend away from hydraulics in other applications as well. Many manufacturers are looking to cut back or eliminate the use of hydraulics, so it is becoming much harder to find spare capacity on a hydraulic pump for the steering system. If spare capacity is not available then it becomes necessary