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Manual control device and method

A controller and control signal technology, applied in the direction of mechanical control devices, manually operated control mechanisms, control mechanisms, etc., can solve problems such as undesired position of the machine tool, transitional adjustment of the position of the machine tool, or over-compensation

Inactive Publication Date: 2014-11-19
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, inexperienced or inattentive operators can sometimes over-adjust the position of the implement in the presence of an obstacle or overcompensate for the force required to move the implement, leaving the implement in an undesired position
These situations are currently unavoidable

Method used

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  • Manual control device and method
  • Manual control device and method
  • Manual control device and method

Examples

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Embodiment Construction

[0013] Exemplary embodiments are described herein with respect to machines having work tools. Operation of the work implement may be performed by selective control of the actuators in response to control signals from the machine controller. In one embodiment, the manual control is configured to control the actuator in response to user input via appropriate displacement of the control handle. The control handle is configured to provide tactile feedback to a user or operator indicating the load status or operating condition of the implement actuator. Haptic feedback may be in the form of selectively varying resistance against displacement of the handle such that commands exceeding the current power capability are avoided. Haptic feedback may also include positive force feedback that tends to push the handle when the handle commands the actuator beyond the system's current capabilities. Although the described embodiments relate to the control of machine implements, the structur...

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Abstract

A manual control device for a machine includes a handle having a variable damper configured to alter a stiffness thereof in response to a control signal. A displacement sensor provides a displacement signal indicative of the displacement of the handle. A controller is associated with the variable damper, the manual control device, the displacement sensor, and the actuator. The controller determines a then present operating state of the actuator and a command provided to the actuator based on the displacement signal, and provides the control signal to stiffen the variable damper such that the displacement of the handle is limited to an additional displacement of the handle that corresponds to a difference between the then present operating state of the actuator and a maximum allowable operating state of the actuator.

Description

technical field [0001] The present invention relates generally to manual controls, and more particularly to manual controls that provide tactile information to a user. Background technique [0002] A machine with implements is usually controlled by a combination of control devices. For example, an operator may use one device—such as a steering wheel or directional stick—to move the machine in a desired direction, use a different device—such as a pedal or lever—to accelerate and decelerate the machine, and use yet another Various devices—such as joysticks—operate the implements of the machine, such as buckets or shovels. [0003] When machines, such as excavators, are operating, they often operate in confined areas and are surrounded by immovable objects, such as building structures, or by hazardous conditions, such as power lines. During these conditions, accurate and precise control of the motion of the work tool needs to be maintained to ensure safe machine operation. C...

Claims

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Application Information

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IPC IPC(8): E02F9/20G05G1/08
CPCG05G5/03G05G9/047Y10T74/20201E02F9/2004G05G1/04
Inventor C·M·埃利奥特
Owner CATERPILLAR INC
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