With the rapid rise of artificial intelligence, a large amount of intelligent techniques,
including neural networks (Zhang et al., 2015), fuzzy logic (Zhong et al., 2017),
and genetic algorithms (Rovithakis et al., 2004) have been broadly applied to various
fields, such as chemical process, robotics, mechanical engineering, etc. In biological
systems, the neural networks usually contain a finite set of modes that switch in
accordance with internal evolution and external stimulation, and such switching can
often be represented as stochastic (Zhang et al., 2016) or even non-deterministic
form (Yang and Zheng, 2018). Recent novel developments in the system and control community
on control and filtering of intelligent systems with some hybrid switching characteristics.
However, the practical applications in the areas of tele-medicine, disease treatment,
and healthcare are lacking due largely to the limitations of existing hybrid intelligent
systems. It is also difficult and challenging to implant these hybrid intelligent
algorithms into the process of existing manufacturing facilities and equipment research
and development.
Recently, autonomous control (Antsaklis et al., 1991; Pachter and Chandler, 1998)—based
on the mode of operation of the autonomic nervous system-has emerged with the advent
of artificial intelligence, and an ever-increasing demand has been placed by users
in different fields (Isakhani et al., 2018; Shen et al., 2018). It is expected that
the advanced intelligent algorithms can be fitted into the learning, optimization
and control design to improve autonomous ability. Also, exploration of the novel communication
mechanisms between autonomous systems and other regulatory systems is very welcome,
building on the existing approaches on networked control systems with communication
constraints (Heemels et al., 2010). The current Research Topic provides a useful overview
of hybrid intelligent algorithm-based learning, optimization and the applications
of these new autonomous control strategies.
Wang et al. investigate the stability and stabilization control problem for non-linear
T-S fuzzy sampled-data systems under time-varying sampling intervals, with and without
quantized states. A new Lyapunov-Krasoskii functional (LKF) named discontinuous LKF
is constructed, such that the LKF is not necessary to be positive all the time, but
only positive at the sampling time. By using the proposed discontinuous LKF approach
and free-matrix-based integral inequality boundary processing technique, stability
conditions that are less conservative are obtained for T-S fuzzy systems with and
without sampled-data quantized states, and the required sampled-data controllers are
designed simultaneously. The simulation results show that the maximum sampling interval
of T-S fuzzy sampling-data systems with and without quantized states are both larger
than the existing results.
Zhang et al. establish the periodic event-triggered control (PETC) scheme of robust
H
∞ filtering for a class of uncertain discrete-time Takagi-Sugeno (T-S) fuzzy systems,
where the sample time is assumed to be a constant. Two frameworks are introduced based
on perturbed linear and piecewise linear systems to analyze the filtering problems
of the PETC strategy. Sufficient conditions for the existence of a robust H
∞ filter are derived in the form of matrix inequalities. The effectiveness of the
proposed approach is testified by using a simulation example.
Guan et al. propose a robust adaptive recurrent cerebellar model articulation controller
(RCMAC) for non-linear MIMO systems, where the GPSO-based RCMAC with the adaptive
law is used for updating parameters, and the learning rates can be optimized to best
value based on the GPSO algorithm. It has been shown that the proposed robust controller
can be designed to compensate for the difference between adaptive RCMAC and ideal
controller.
Zhao et al. present the wavelet fuzzy brain emotional learning controller (WFBELC)
model for the uncertainty of the MIMO non-linear systems based on the wavelet theory,
type-1 fuzzy inference and the BEL algorithm. The WFBELC is used as the main tracking
controller for a MIMO uncertain non-linear system and the robust compensation controller
is used as a compensator. It has been shown that this proposed WFBELC model can effectively
obtain satisfactory control capability with better transient responses and smaller
error values, compared to the fuzzy cerebellar model articulation controller (FCMAC)
design scheme and the brain emotional learning controller (BELC) design scheme.
Bi et al. introduce a novel model called the Genetic-Evolutionary Random Support Vector
Machine Cluster (GE-RSVMC) to classify individuals with Asperger syndrome and neurotypical
individuals, and search for lesions within the brain. The model innovatively integrates
the methods of cluster and genetic evolution to improve the performance of the model.
It has been shown that the classification accuracy of the model reaches 97.5% and
identifies brain regions showing significant differences. The proposed method also
provides a new perspective for the diagnosis and treatment of Asperger syndrome.
Author Contributions
All authors listed have made a substantial, direct and intellectual contribution to
the work, and approved it for publication.
Conflict of Interest
The authors declare that the research was conducted in the absence of any commercial
or financial relationships that could be construed as a potential conflict of interest.