Pointer device for thin-film transistor and cathode ray tube computer screens

Sanders, David; Urwin-Wright, Steven; Tewkesbury, Giles; Grémont, Boris

doi:10.1049/el:20051388

Cited by 30 publications

(33 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In terms of the criteria for assessing user-interfaces shown in figure 6, the selected programming environment possessed tools and functions to easily create a Graphical User Interface. Testing of the user-interface was similar to [46,47]. Similarly, if parts handling devices could not deliver and remove parts or the orientation of the parts made assembly impossible then that would be flagged to the User Interface and sent to the Design-Analysis Expert.…”

Section: User Interfacementioning

confidence: 99%

An expert system for automatic design‐for‐assembly

Sanders

Tan²,

Rogers³

et al. 2009

Assembly Automation

View full text Add to dashboard Cite

Purpose-A Multi Expert System is presented that can analyse a design and provide designers with suggestions for improvement and changes to designs at an early stage in order to improve assembly later in the manufacturing process. The Multi Expert System can analyse a design and provide designers with suggestions for improvement and changes to designs at an early stage in order to improve assembly later in the manufacturing process. Design/methodology/approach-The whole system consists of four expert systems: Computer Aided Design (CAD) Expert, Automated Assembly Expert, Manual Assembly Expert and Design Analysis Expert. The Design Analysis Expert includes a subsystem to collate the information from the Assembly Experts and to provide costs and advice Findings-The approach and the systems can reduce manufacturing costs and lead times. Research limitations/implications-A knowledge-based reckoning approach to design-for-assembly automation is used. The approach and systems can reduce manufacturing-costs and lead-times. The system can estimate assembly-time and cost for manual or automatic assembly and select suitable assembly techniques. Practical implications-The system can estimate assembly time and cost for manual or automatic assembly and select a suitable assembly technique. Originality/value-The new system models assembly, product and process design using a natural approach for capturing intelligence. The new approach categorised automated assembly and manual assembly into separate individual experts. Intelligence and knowledge from each was captured and embedded within the individual expert that represented the process. This approach enabled greater flexibility and made the subsystems easier to modify, upgrade, extend and reuse.

show abstract

Section: User Interfacementioning

confidence: 99%

An expert system for automatic design‐for‐assembly

Sanders

Tan²,

Rogers³

et al. 2009

Assembly Automation

View full text Add to dashboard Cite

show abstract

“…Common disturbances include differences in mobile-robot wheels or tractors or their different reaction to surfaces and surface or gradient 5,[45][46][47] . Users have been left to Tele-operated mobile-robots are generally guided using manual controls, often joysticks 5,34,46,48 although other input devices are available, such as switches 40 , or pointers [49][50][51] or custom built, such as Virtual Reality interfaces 52 .…”

Section: Introductionmentioning

confidence: 99%

Simple expert systems to improve an ultrasonic sensor‐system for a tele‐operated mobile‐robot

et al. 2011

View full text Add to dashboard Cite

Time taken to complete a tele-operated task with a mobile-robot partly depends on how a human operator interacts with the mobile-robot. Current tele-operated systems tend to rely heavily on visual feedback and experienced operators and this paper investigates how to make their tasks easier using an expert system to interpret joystick and sensor data. Simple expert systems improve that interaction for a tele-operated mobile-robot using ultrasonic sensors. Systems identify potentially hazardous situations and recommend safe courses of action. Results are presented from a series of timed tasks completed by tele-operators using a joystick to control a mobile-robot via an umbilical cable and watching the robot while operating it or sitting at a computer and viewing the area ahead of the robot. Tele-operators completed tests both with and without sensors and using the recently published systems to compare results. The new systems described here consistently performed tasks more quickly than some recently published systems. The paper also suggests that the amount of sensor support should be varied depending on circumstances.

show abstract

“…Others have considered the steering of a robot in real-time according to the most recent sensor readings and different interfaces to program or control robots (Sanders, 2009a), for example using pointers (Sanders and Tewkesbury, 2009;Sanders et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Simple rules to modify pre‐planned paths and improve gross robot motions associated with pick & place assembly tasks

Sanders

Tewkesbury²,

Graham-Jones³

2011

Assembly Automation

View full text Add to dashboard Cite

PurposeThis paper aims to describe real time improvements to the performance and trajectories of robots for which paths had already been planned by some means, automatic or otherwise. The techniques are applied to industrial robots during the gross motions associated with pick and place tasks. Simple rules for path improvement are described.Design/methodology/approachThe dynamics of the manipulator in closed form Lagrange equations are used to represent the dynamics by a set of second‐order coupled non‐linear differential equations. The form of these equations is exploited in an attempt to establish some simple rules. Sub‐optimal paths are improved by considering simple rules developed from the model of the machinery dynamics. By considering the physical limitations of the manipulator, performance was improved by refining pre‐calculated paths. Experiments were performed with a prototype robot and an old Puma 560 robot in a laboratory environment. Once the method had been tested successfully then experiments were conducted with a Kuka KR125 Robot at Ford Motor Company. The measured quantities for all the robots were drive currents to the motors (which represented the torques) and the joint angular positions.FindingsThe method of path refinement presented in this paper uses a simplified model of the robot dynamics to successfully improve the gross motions associated with a pick and place task. The advantage of using the input‐output form described was that intermediate non‐linearities (such as gear friction) and the motor characteristics were directly incorporated into the model.Research limitations/implicationsEven though many of the theoretical problems in manipulator dynamics have been solved, the question of how to best apply the theories to industrial manipulators is still being debated. In the work presented in this paper, information on system dynamics is used to produce simple rules for “path improvement”.Practical implicationsMost fast algorithms are for mobile robots and algorithms are scarcer for manipulators with revolute joints (the most popular type of industrial robot). This work presents real time methods that allow the robot to continue working while new global paths are automatically planned and improved as necessary.Originality/valueMotion planning for manipulators with many degrees of freedom is a complex task and research in this area has been mostly restricted to static environments, offline simulation or virtual environments. This research is applied in real time to industrial robots with revolute joints.

show abstract

Pointer device for thin-film transistor and cathode ray tube computer screens

Cited by 30 publications

References 6 publications

An expert system for automatic design‐for‐assembly

An expert system for automatic design‐for‐assembly

Simple expert systems to improve an ultrasonic sensor‐system for a tele‐operated mobile‐robot

Simple rules to modify pre‐planned paths and improve gross robot motions associated with pick & place assembly tasks

Contact Info

Product

Resources

About