The series Advances in Industrial Control aims to report and encourage technology transfer in control engineering. The rapid development of control technology impacts all areas of the control discipline. New theory, new controllers, actuators, sensors, new industrial processes, computer methods, new applications, new philosophies . . . , new challenges. Much of this development work resides in industrial reports, feasibility study papers and the reports of advanced collaborative projects. The series offers an opportunity for researchers to present an extended exposition of such new work in all aspects of industrial control for wider and rapid dissemination. Operating plant as close as possible to constraint boundaries so often brings economic benefits in industrial process control. This is the conundrum at the heart of this monograph by Tommy Gravdahl and Olav Egeland on stall control for compressors. Operation of the compressor closer to the surge line can increase operational efficiency and flexibility The approach taken by the authors follows the modern control system paradigm: -physical understanding, detailed modelling and simulation studies and finally control studies. The thoroughness of the presentation, bibliography and appendices indicates that the volume has all the hallmarks of being a classic for its subject. Despite the monograph's narrow technical content, the techniques and insights presented should appeal to the wider industrial control community as well as the gas turbine/compressor specialist. M. J. Grimble and M. A.

The theory and discussion presented is backed up by case studies Brings together an overview of the achievements in modeling and control over the last decade Virtually unique in being dedicated to both modeling and control

Klappentext

This work gives a comprehensive overview of the achievements in the field of modelling and active control of instabilities in compressions systems over the last decade. Existing models of unstable compression systems are in most cases restricted to constant speed compressors. Here, two models are derived that take time varying rotational speed into account - one for centrifugal compressors and one for axial compressors. The main focus of the modeling element is the inclusion of non-constant speed in existing dynamic models of unstable compression systems, and the study of surge and rotating stall in connection with this. The focus of the control element is the use of a close coupled valve as a means of stabilising surge and rotating stall. Little work has yet been published on this.

Inhalt
1 Compressor Surge and Stall: An Introduction.- 1.1 Introduction.- 1.2 Compressors.- 1.3 Application of compressors.- 1.4 Stability of Compression Systems.- 1.5 Previous work on modeling of axial compression systems.- 1.6 Previous work on modeling of centrifugal compr. systems.- 1.7 Jet engine and gas turbine models.- 1.8 Previous work on surge/stall avoidance.- 1.9 Active Control of Surge and Rotating Stall.- 1.10 Sensor/actuator selection in surge/stall control.- 2 CCV Control of Surge and Rotating Stall for the MG Model.- 2.1 Introduction.- 2.2 Preliminaries.- 2.3 Surge Control.- 2.4 Control of Rotating Stall.- 2.5 Simulations.- 3 Passivity Based Surge Control.- 3.1 Introduction.- 3.2 Model.- 3.3 Passivity.- 3.4 Disturbances.- 3.5 Simulations.- 3.6 Concluding Remarks.- 4 A MG Model for Axial Compr. with Non-constant Speed.- 4.1 Introduction.- 4.2 Preliminaries.- 4.3 Modeling.- 4.4 Simulations.- 4.5 Concluding Remarks.- 5 Modelling and Control of Surge for a Centrifugal Compressor with Non-constant Speed.- 5.1 Introduction.- 5.2 Model.- 5.3 Energy Transfer.- 5.4 Energy Transfer and Pressure Rise.- 5.5 Choking.- 5.6 Dynamic Model.- 5.7 Surge Control Idea.- 5.8 Controller Design and Stability Analysis.- 5.9 Simulations.- 5.10 Conclusion.- 6 Concluding remarks and further research.- 6.1 Conclusions.- 6.2 Further research.- A Stability of the Greitzer model.- B Nomenclature.- C Some Thermodynamic and Fluid Mechanical Relations.- C.1 Flow and Pressure Coefficients.- C.2 Isentropic Processes.- C.3 Mass Balance of the Plenum.- C.4 Flow through a Nozzle.- C.5 Compressor Pressure Rise.- D Including a CCV in the Moore-Greitzer Model.- E Numerical Values Used in Simulations.- F Bounds on the Controller Parameters of Theorem 2.5.