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For the navigation of a mobile robot, the determination of its absolute location is one of essential tasks. This paper proposes a stripe type landmark which enables us to develop a fast algorithm to calculate the distance and orientation of a camera relative to the landmark. Exact and closed form solution of the camera location is obtained from the geometric relation between the pattern of landmark and its projected image. Since the presented algorithm requires only one row of the mark image, determination of the location can be processed in real-time. In addition, the mark can be identified using the projective invariant of the original mark pattern without any additional patterns. The effect of the error sources on the location determination is analyzed through a series of simulations and experiments. The applicability of the algorithm to mobile robots is discussed using the experimental results.
To remove humans from hazardous environments “good” teleoperated robotic systems are needed. “Good” is defined here to mean a system which is task centred and which is transparent to the user-in other words, a system you can see through. A teleoperated robotic system which strives towards this goal is described by way of illustration. The fundamentals that have helped to achieve this are: design and build from a task centred viewpoint, careful design of the Human Computer Interface(HCI) and special consideration for the systems integration task.
Initial development of a robotic meat cutting system based on force feedback control and continuous path planning is described. Forequarter beef cutting is attempted where each carcass processed will be compared to a database containing cut information for previously processed beef carcasses. Using the database information, cut start and end points can be defined along with initial path direction for each cut. A robot then drives a powered knife through the carcass utilising force feedback control to follow bone profiles, thus removing meat from the forequarter. An original cutting scheme suitable for robotic butchery of a beef forequarter is defined, along with a notation scheme for describing the cutting procedures.
The major thrust of technological development is the reduction of the demands made by I.T. equipment on its users. The economic pressures which underpin such developments are based on 2 principles: the continuing fall of the cost of processing power (but particularly storage) and the market edge of simple as opposed to complex systems.
The techniques which can no longer be disregarded include voice and vision communication which frees the users' hands from the prison of the keyboard: also the logical power of IT equipment will not only extend excellence of rigorous reasoning, but also the type of person to person reasoning which takes the human factor into account.
The paper describes a study of potential industrial applications where modular robots can be used in preference to conventional pedestal mounted robots and/or specially designed automatic machines. The study was conducted with reference to a particular family of pneumatically actuated robot modules.
The paper also describes a modular robotic system which was designed to automate assembly processes in the manufacture of a family of egg coddlers. The manipulator comprises multi-axis groups of modules which operate concurrently to perform the assembly operations. Flexibility is incorporated through the use of a hierarchical control system architecture.
Machine vision systems incorporating highly parallel processor architectures are reviewed. A new processor architecture, the image flow computer, is presented in detail. An interactive image processing programming language based on mathematical morphology is then presented. A detailed example of the use of the system for the inspection of a particular industrial part concludes the presentation.
In most dynamic adaptive control simulation of robotic manipulators, the Langrange–Euler (L–E) dynamic equations are first piecewise linearized about the desired reference and then discretized and rewritten in a state space form. This makes things very complicated and it is easy to make errors. What is more is that with a different reference this work must be done again. A new simulation scheme – Backward Recursive Self-Tuning Adaptive (BRSTA) – as it will be called, is suggested in this paper for adaptive controller design of robot manipulators. A two degree of freedom robot manipulator is used to verify the scheme in the condition of highly nonlinear and highly coupled system. A one degree of freedom robot manipulator is used for comparing both the forward and backward methods. The main advantages of this scheme include that it can be used for evaluating the self-tuning adaptive control laws and provide the initial process parameters for real-time control. And it is concluded here that the Newton–Euler (N–E) dynamic equations are equally well qualified as the Langrange–Euler (L-E) equations for the simulation of self-tuning adaptive control of robot manipulators.
After reviewing historical developments in robotics, particularly in Europe, and the current applications in industry, The author indicates possible trends in the future as regards the expansion of industrial automation and its impact on employment. Of interest is the concept of technological consortia or ‘systems houses’ capable of understanding from a ‘system’ perspective the cost-effective implications of overall system design. The final part of the paper is concerned with the examination of goals that lead to future developments, viz. the convergence of traditionally separate technologies, new design methodologies, rational software design, harmony between different kinds of software, and a new look at education and training leading to the emergence of a new type of engineer. The author advocates a balanced emphasis on these aspects and their co-ordination.
A new elastic structure of a robot wrist, which exhibits a six decree of freedom flexural capability, is described. Force and compliance analysis is made, and algorithms for geometrical parameter synthesis are proposed. Owing to the technological simplicity of the designed structure, it is possible to construct cost-effective compliance devices. The intended use is to permit the assembly of close tolerance parts with industrial robots having relatively low positional accuracy. It could also be applied to other manual or automatic matching operations.