DAVIS, CA September 23, 2003 - SoftIntegration, Inc., the leader of scripting technology for ubiquitous computing, today announced the release of Ch Control System Toolkit version 2.0. Ch is a superset of C interpreter for scripting, 2D/3D plotting, numerical computing, shell programming and embedded scripting. Ch Control System Toolkit is designed for modeling, design, and analysis of continuous-time or discrete-time linear time invariant (LTI) control systems.

Ch Control System Toolkit supports most classical and modern control
techniques through object-oriented programming based on a control class. It is simple and easy to use.

The new released Ch Control System Toolkit adds the Web-based control and analysis capabilities. The modeling, design, and analysis of control systems can be easily performed on line using a Web browser without any software installation, configuration and computer programming.

A control system can be modeled in the form of transfer functions,
zero-pole-gain, or state-space. Ch Control System Toolkit can perform
analysis and design of control systems in both time and frequency domains with extensive graphical plotting capabilities. In addition, it can seamlessly interface existing C/C++ code in either source code or binary libraries without re-compilation.

Ch Control System Toolkit contains the following major features:

* C/C++ Compatible
     Different from other similar control software packages, programs
written in Ch Control System Toolkit can seamlessly. interface existing
C/C++ code in either source code or binary static/dynamical libraries
without re-compilation.

* Object-Oriented
     Implemented as a class, Ch Control System Toolkit is object-oriented.

* Embeddable
     With Embedded Ch, Ch programs using Control System Toolkit can be embedded in other C/C++ application programs.

* Web-Based
     Using the Web-based control design and analysis system in the Ch
Control System Toolkit, design and analysis of control systems can be
performed through the Web using a Web browser over the internet without any
software installation, system configuration and programming.

* Model Building
     Support multiple model representations such as state-space models, transfer function, and zero-pole-gain models both for continuous-time and discrete-time linear time invariant (LTI) systems. When a system is created using one of these three models, the Ch Control System Toolkit automatically converts it to other two models internally and keeps the information of these three models for user to retrieve.

* Continuous/Discrete Systems Conversions
     Provide the capability of converting from continuous to
discrete, discrete to continuous, and discrete to discrete system.

* System Interconnecting and Reduction
     Construct arbitrary complex system models given in a block diagram form by using interconnecting member functions.

* Time Domain Analysis
     Compute the time responses to arbitrary inputs and initial conditions for both SISO and MIMO systems. The typical inputs are step and impulse inputs. The output responses can be displayed by either a plot or a data set.

* Frequency Domain Analysis
     Generate commonly used frequency response plots of Bode, Nyquist and Nichols plots. Calculates the bandwidth, DC gain, gain and phase margins of a SISO system for system dynamics and stability analysis.

* Root Locus Design
     Calculate and plots the root locus of a SISO system.

* Controllability and Observability
     Construct the controllability and observability matrices. Determines the controllability and observability of systems. Calculates the controllability and observability grammians of a state-space model.
    
* State-Space Design
     Find the control-law and estimator that will allow the user to select a set of pole locations for a satisfactory system dynamic response.

* Optimal Control System Design and Equation Solvers
     Calculate LQ-optimal gain for both continuous and discrete systems. Solves continuous and discrete-time Lyapunov equations.

* Plotting Utilities
     Provide many plotting functions to allow output visually displayed or exported as external files with a variety of different file formats. They can also readily be copied and pasted in other applications such as Word in Windows.

Ch Control System Toolkit is based on Ch Professional Edition. It is free for academic use and costs $299 for commercial or personal use. It can run across platform in Windows 95/98/Me/NT/2000/XP, Linux, Mac OS X, Solaris, and HP-UX.



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