This book furnishes the basic theory needed by the modern structural engineer in actively controlling the behaviour of engineering systems. The book also examines the advance of materials technology and the advent of powerful, reliable microprocessors. Topics include the design and control of discrete parameter adaptive structure, the influence of dynamic distrubances and control loads, and an introduction to distributed parameter adaptive. TOC:Preface.- Introduction.- Excitation-response relations, static case.- Active control of response, static case.- Statically determinate adaptive structures.- Statically indeterminate adaptive structures.- Excitation-response relations, dynamic case.- Inverse relations, dynamic case.- Active vibraion control, autonomous systems.- Active vibration control, nonautonomous systems.- Vibration control in buildings under wind excitations.- Vibration control in buildings under seismic excitation.- Introduction to disbributed parameter adaptive structures.- Appendix A: Linear vector spaces of n-Tuples.- Appendix B: Algebraic Eigenvalue problem.