Relay System


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relay system

[′rē‚lā ‚sis·təm]
(communications)
(electricity)
Dial-switching equipment that does not use mechanical switches, but is made up principally of relays.

Relay System

 

in control, an automatic control system in which at least one component has a relay characteristic. A relay system is one type of nonlinear sampled-data automatic-control system.

A distinction is made between two-step and multistep relay systems. The fundamental characteristic of two-step relay systems is the presence of self-maintained oscillations in the output (controlled) parameter of the system when the system is in a steady-state condition—that is, after transient processes have ended. The amplitude and period of the self-maintained oscillations are determined by the relay characteristic of the relay element used, the dynamic characteristics of the controlled system, the actuating mechanisms, and the measuring and converting devices in the automatic control system.

Relay systems are relatively simple to manufacture and operate, and their cost is low. The use of contactless relay elements improves the reliability of the system. Relay systems are extensively used in the control of various production processes.

References in periodicals archive ?
"Joint transceiver optimization for two-way MIMO relay systems with MSE constraints," IEEE Wireless Communication Letters, vol.
When the transmission rate is larger than the mutual information of the relay system, the system will be interrupted.
The channel outage probability of the secondary DF relay system can be expressed as [9]
We consider the Gaussian relay system model shown in Figure 2.
It must be noted that, since we compare the relay system performances with the direct link, for a fair comparison, the global encoding rate must be the same.
Yao, "Capacity analysis for multiple-input multiple-output relay system in a low-rank line-of-sight environment," IET Commun., 2012, Vol.
The required FLOPs of the proposed method, conventional RBD, and the nonregenerative MIMO relay system are counted as 34638,40824, and 45306, respectively.
The EE of two-way and one-way relay systems was analyzed in [11] and the search technique was used to find the optimal solution which had high complexity and incurred additional energy.
In particular, the diagonal relay amplifying matrix in the three-hop AF wireless distributed relay system consisting of all nodes with only a single antenna is more practical than the nondiagonal one.
Under the current relay system, an assistant acts as an intermediary to convert speech to text and vice versa for the two parties.
Relay propagation will be affected not only by its travel path but also by the relay system, such as the size of the receiver of relay system and the correction, which is different from the direct propagation.