Assertion (A): The system functionH(z) = z3-2z2+z/z2+1/4z+1/s is not causalReason (R): If the numerator of H (z) is of lower order than the denominator, the system may be causal.

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Digital Control Systems topics include: Signal reconstruction, z transform, z-transfer function, equations, z and s domain relationship, stability analysis and compensation techniques. A digital control system (DCS) uses a computer to process signals from sensors and control a system or process. DCSs are a mix of discrete-time and continuous-time behavior. They can be in the form of a microcontroller, ASIC, or standard desktop computer.  DCSs have several advantages over other control systems, including: Improved process control: DCSs use advanced control algorithms, such as PID control,... Show more

Assertion (A): The system function<br />H(z) = z<sup>3</sup>-2z<sup>2</sup>+z/z<sup>2</sup>+1/4z+1/s is not causal<br />Reason (R): If the numerator of H (z) is of lower order than the denominator, the system may be causal.