Fault Detection in Multirate Sampled-data Systems with Time-delays
نویسندگان
چکیده
In this paper, an approach is proposed to the fault detection in multirate sampled-data (MSD) systems with multiple time-delays in both input and output channels. The background of our study is the increasing demands for fault detection in complex, distributed process control systems, where the plant, controllers, sensors and actuators are networked by standardized bus systems. The core of the approach proposed is a) to derive parity relations of the MSD system with timedelays while taking the different sampling rates and time-delays into account; b) to take the intersample behaviour of the continuous-time disturbances and faults into consideration with the help of operators. Copyright c °2002 IFAC
منابع مشابه
An optimal scheme for fast rate fault detection based on multirate sampled data
Multirate systems are abundant in industry. In this paper, the problem studied is designing a residual generator for fault detection based on multirate sampled data. The key new feature of such a residual generator is that it operates at a fast rate for prompt fault detection. The design is based on optimizing a performance index to obtain an optimal parity space based residual generator. The l...
متن کاملFault Diagnosis in Multirate Sampled Data Systems
In this paper we present three new schemes for sensor and actuator fault diagnosis for linear time-invariant systems: multirate parity-space techniques, multirate observers, and multirate detection filters. We show that these approaches offer distinct advantages over conventional fault diagnosis schemes in terms of ease of failure detection, the speed and the class of systems for which detectio...
متن کاملStructural Properties of Multirate Sampled-Data Systems
The application of Networked Control Systems (NCS) in which sensory and control signals are transmitted via shared data communication networks, is growing significantly and these systems have been the subject of research during the last decade. On the other hand, multirate sampled data systems have been investigated since a long time. In this paper, conditions under which a networked control sy...
متن کاملAn H1 approach to fast rate fault detection for multirate sampled-data systems
In this paper the problem of fault detection in multirate sampled-data systems is studied. The lifting technique and direct design approach are used to convert the time-varying multirate design problem into an equivalent time-invariant single-rate discrete-time problem. A performance index is optimized to obtain a set of H1 optimal and causal residual generators. The key new feature of such a r...
متن کاملFault Detection and Isolation in Non-uniformly Sampled Systems
Abstract: This paper considers fault detection and isolation (FDI) in a non-uniformly sampled multirate system. By extending the Chow-Willsky scheme from single rate systems to multirate systems, one generates a primary residual vector (PRV) for fault detection. Further, by structuring the PRV to have different sensitivity/insensitivity to different faults, fault isolation is performed. The pow...
متن کامل