ðə ɹoʊbˈʌst stəbˈɪlᵻɾi ʌvðə klˈoʊzd lˈuːp sˈɪstəm mˈʌst biː tʃˈɛkt sˈɛpɹətli ˈæftɚ ðɪ ˌɛlkjˌuːdʒˈiː kəntɹˈoʊlɚ hˈæzbiːn dɪzˈaɪnd.
The robust stability of the closed loop system must be checked separately after the LQG controller has been designed.