Identification and Control of Bilateral Telerobot with Time Delay
Telerobotics, the body of science and technology which bridge lannan control and purely autonomous machi-nes, is expected to be a merging point of modern develop-ments in robotics, control theory, cognitive science and computer science. Telerobot helps human operator feel and control the temote pre-unknoum environment as if he/she is at the temote site, which is usually called" telepresence". However, the transmission time delay be-tween master manipulator and slave manipulator causes in-stability of the telerobot sysem and bad" telepresence" of human operator. In this paper, a new adaptive and pas-sive control scheme based on active impedance matching is proposed to quqrantee stability and transparency of the bi-lateral telerobot system. An adaptive impedance term which is active and should adapt to the impedance of envi-toninent is defined in this new control scheme. A genetic algorithm (GA) is used to directly ulentify parameters of the environment impedance, because the GA can suc-cess in the search for global. optinaan when the search space is not differentiable or linear in the parameters. The tesults of experiment show that.