Kybernetische grundlagen und beschreibung kontinuierlicher systeme / the basic principles of cybernetics in continuous-time systems : by Karl Reinisch. 384 pages, 255 figures, 32 tables, 6 × 9 in. VEB Verlag Technik, Berlin, 1974. Price, $20.50 (approx.) (approx. £8·50).

Abstract

This chapter discusses the sensitivity considerations for sampled-data feedback systems with a minimal prototype response. As distinct from continuous linear control systems, the settling time of a system with discrete control elements can be made finite not only practically, but also theoretically. After a short and defined transient time the controlled variable follows without deviation the specified command signals such as step, ramp, or parabola. These properties of a special type of sampled-data systems are usually described by the overall prototype response function (PRF) or deadbeat-response. To reduce the influence of parameters, it has been proposed to introduce self-adjustment in sampled data systems with PRF response. The problem of measuring parameter values, which is associated with every correction and which is an inherent difficulty of every self-adjusting system, is tacitly assumed to be solved. The requirements in time and hardware imposed by process identification are considerable even in continuous systems.