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Unformatted text preview: Safety and Ergonomics Spring 2010/ 2011 1 Safety and Ergonomics Controls Spring 2010/ 2011 2 Controls definitions Â¡ Activators (ISO Standards) Â¡ Transmit input to a piece of equipment Â¢ Operated by: Hand, Foot Â¡ The interface between person and machine Â¡ Transfers mechanical energy or information for functions to be performed Â¡ Provides the touch and feel of the system Spring 2010/ 2011 3 Controls Â¡ Activate or shutdown equipment Â¡ Make a discrete setting; Â¢ selecting a channel, entering data via keyboard Â¡ Make a quantitative settings Â¢ Thermostat temperature Â¡ Apply continuous control Â¢ steering Spring 2010/ 2011 4 Controls selection Â¡ The type of control shall be compatible with stereotypical, expectations Â¢ To turn a light Ã† push button or toggle witch, not rotary knob Â¡ Controls size and motion characteristics shall be compatible with experience Â¢ fairly large steering wheel, not small rotary control in automobiles Â¡ The direction of operation of a control shall be compatible with expectations Â¢ on control Ã† pushed or pulled Â¡ Compatibility of control machine movement Â¢ Controls direction movement Ã† compatible with the response movement of the controlled machine Safety and Ergonomics Spring 2010/ 2011 2 Spring 2010/ 2011 5 Controls selection Spring 2010/ 2011 6 Controls selection Spring 2010/ 2011 7 Controls selection Â¡ The control shall be safe Â¢ It will not be operated inadvertently, in false or excessive ways Â¡ Operations requiring fine control and small forces shall be done with hands, while gross adjustments and large force are usually exerted with the feet. Â¡ Control actuation force or torque Â¢ The force or torque applied by an operator to actuate a control shall be kept as low as possible, particularly if the control is operated often. Â¢ If jerks or vibrations arise, it is usually better to stabilize the operator than to increase the resistance of the control in order to prevent uncontrolled or inadvertent activation....
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- Spring '11